Browse Topic: Thermoplastics

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Development of Advanced Thermoplastic Elastomeric Mat and Its Study on Thermal Performance of Wireless Charging System2026-26-02831/16/2026
This study aimed to develop a thermally conductive TPE mat and assess its performance in comparison to an existing antiskid rubber mat, specifically evaluating its impact on wireless charger efficiency. Moreover, morphological and thermal analyses were conducted to establish a correlation between the material behaviours of the new and current thermally conductive antiskid mats. The process of developing the thermally conductive TPE involved utilizing a two-roll mill followed by compression moulding to achieve a 2D sheet shape. Notably, the thermally conductive mat demonstrated a consistent enhancement in charging efficiency over the conventional antiskid mat. To examine the thermal characteristics, thermal characterization techniques including DSC and TGA were employed for both the existing and newly developed mats. FTIR spectroscopy was also utilized to confirm the presence of organic functional groups within the mat. The morphological analysis of the fillers used to enhance thermal
NAIKWADI, AMOL TARACHAND, Mali, Manoj, Patil, Bhushan, Tata, Srikanth
Material-Optimization in Rib-Stiffened Polymer structures: A Computational & Analytical Study2026-26-04981/16/2026
Background The demand for lightweight yet rigid polymer components continue to drive innovation in structural design, particularly for applications requiring optimal stiffness-to-weight ratios. This study examines an alternative rib-stiffening approach for polypropylene plates, where conventional single-rib geometries are reconsidered in favor of parallel micro-rib configurations. While single ribs have been extensively studied, the potential benefits of distributed rib architecture remain less explored, particularly regarding their combined bending and shear performance. Key objective: This study systematically evaluates how parallel rib configurations influence mechanical performance in polypropylene plates, with specific focus on:  Bending stiffness preservation through optimized moment of inertia distribution  Shear resistance enhancement via controlled rib spacing  Coupled effect of the bending and shear resistance Prior art and their limitations: Current literature primarily
Sreejith, M P, Jain, Deepak, Maheshwari, Pankaj, Kumar, Mandeep, Ravi, Abhikrishna
Numerical Investigation on Thermo-Mechanical Characteristics of Injection-Molded Thermoplastics using Anisotropic Material Properties2026-26-02801/16/2026
This paper presents a comprehensive numerical method intended at developing a coupled process structure simulation that integrates both elastoplastic and anisotropic material behavior for short glass fiber-reinforced injection-molded thermoplastics. Three engineering tools, namely Moldflow, Digimat, and ABAQUS are used in the current numerical methodology to assess material anisotropy and its influence on thermo-mechanical characteristics. The simulation incorporates fiber orientation concerns as well as potential injection molding defects known as weld lines, linking with thermo-mechanical simulations. The behavior of real injection-molded components is computationally represented by the ability to transfer data from injection molding software (Moldflow) to structural software (ABAQUS). Besides, integrating with multi-scale modeling software Digimat as an interface tool, the results of the Moldflow simulations, such as fiber orientations and weld-line properties transmitted directly
T, KALINGA, Yanamadala, Dharma Teja, Mattupalli, Venkata, Chirravuri, Bhaskara, Miller, Ronald
DESIGN & STATIC STRUCTURAL ANALYSIS OF COMPOSITE PROPELLER SHAFT: A COMPARATIVE STUDY2026-26-02971/16/2026
Advanced Fiber Reinforced Polymer (FRP) composites have emerged as an important class of engineering materials for load bearing applications with all round properties for many engineering and social applications. Composite materials are created by combining two or more dissimilar materials with a viewpoint to improve the properties or to create materials with desired properties. Substituting composite structures for conventional metallic structures has many advantages because of higher specific strength and stiffness of composite materials. The role of composite material in weight reduction and fuel saving in automobiles is highly significant. Advanced composite seems ideally suited for long, power drive shaft applications. Their elastic properties can be tailored to increase the torque and the rotational speed at which they operate. Composite driveshaft is designed based on filament winding technology for higher strength and torque applications. In the present work, a comparative
Indla, Veneil Sai, REDDY, NEERATI, Kopparapu, Laxmi kanth
New generation Natural Rubber-Based Bump Stopper with Improved NVH Characteristics2026-26-02921/16/2026
In automotive suspension systems, components like bump stoppers and jounce bumpers play critical roles in controlling suspension travel and enhancing ride comfort. Material selection for these components is driven by functional demands and performance criteria. Traditionally, Natural rubber (NR) has traditionally been favoured for bump stopper applications due to its excellent vibration absorption, tear resistance, cost-effectiveness, and biodegradability. However, in more demanding environments, it has been largely replaced by microcellular polyurethane (PU) elastomers, which offer superior durability, environmental resistance, and enhanced noise, vibration, and harshness (NVH) performance. PU's high compressibility, low lateral expansion, and low compression set make it the material of choice across automotive, aerospace, and industrial sectors. Other materials like thermoplastic elastomers (TPE/TPU) and EPDM rubber are also used, offering advantages such as recyclability, ease of
Murugesan, Annarajan, Perumal, Mathavan
Hose Assembly, Polytetrafluoroethylene, Cres Reinforced, 400 °F, 3000 psi, Lightweight, Beam Seal, Straight to 90°AS1911D (Current)11/26/2025
No scope available
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
Bearing, Plain, Self-Aligning, PTFE Lined, NarrowAS21233B (Current)11/26/2025
No scope available.
ACBG Plain Bearing Committee
Bearing, Plain, Self-Aligning, Grooved Outer Ringer PTFE Lined, WideAS21230B (Current)11/26/2025
No scope available.
ACBG Plain Bearing Committee
Blade Stiffened Carbon/Epoxy Panels with Longitudinally Tapered Acoustic Black Holes for Vibration ReductionF-0081-2025-02765/20/2025
Carbon/epoxy stiffened panels are being increasingly used in transport rotorcraft. The reduced mass density and high stiffness of carbon/epoxy composites can lead to higher levels of vibration relative to comparable metallic structures, which themselves can have vibrations and interior noise high enough to damage the hearing of crew and passengers. The current investigation explores a method to reduce the vibration of carbon/epoxy stiffened panels by introducing thickness tapers known as acoustic black holes (ABHs). The ABH feature is integrated into either the stiffeners or plate of a representative stiffened panel configuration. A finite element (FE) parametric study was used to guide designs that reduce the vibration of the panel without compromising the compressive buckling capability or mass of the panel. FE studies showed that a 30 ply to 12 ply thickness taper longitudinally oriented in the blade stiffener can reduce vibrations and increase compressive buckling capability
Brown, Avery, Patel, Bhavya, Robertson, Noah, Bakis, Charles, Smith, Edward, Beck, Ben, Shepherd, Micah, Vlajic, Nicholas
Lightweight Low-Cost Multifunctional Thermoplastic Composite AirframeF-0081-2025-01625/20/2025
With performance advances proposed for the Future Vertical Lift suite of aircraft and advancements in the electronic battlefield, it is imperative that advanced materials and concepts be included in the vehicle designs to meet the aggressive weight reduction objectives, structural requirements, and operational environment capabilities. Integrating electromagnetic (EM) shielding during the design process offers an opportunity to make progress towards the performance goals. To this end, efforts must be made to minimize the impact of this shielding to platform weight and structural performance. This article presents work to develop a hybrid multifunctional composite material technology that incorporates copper mesh into a carbon fiber and thermoplastic matrix structural composite material to achieve required levels of EM shielding and high levels of structural efficiency while reducing the overall weight of the system. This article focuses on the design of a representative helicopter
Haynes, Robert, Luzetsky, Harry, Phifer, Ellen
Maximizing the Potential of TPU Extrusion in Medical Tubing ApplicationsTBMG-5216412/1/2024
Whether for vascular catheters or implantable devices, medical tubing must meet tough standards for flexibility, strength, and biocompatibility. That’s why more manufacturers are turning to thermoplastic polyurethanes (TPUs) that strike the ideal balance between these key properties, making them an excellent choice for high-performance medical tubing. Unlocking the best that TPUs have to offer means optimizing the extrusion process. This article looks at why TPUs are a top pick, the common obstacles in extrusion, and the ways manufacturers can fine-tune their process to get the most out of different grades.
Characterization and Modelling of Composite Fastened Joints for Impact AnalysisF-0080-2024-12605/7/2024
This work proposes an experimental and numerical activity aimed at developing methods to evaluate the strength and toughness of Kevlar/Epoxy composite fastened joints used in aeronautical structures and exposed to high energy impacts. Experiments were conducted using an Arcan rig that allowed applying various loading conditions, ranging from pull-through to bearing. A non-linear model of the material based on a bi-phasic decomposition and hybrid meshing technique was built and calibrated. The material model was used to develop a high-fidelity model of the junction to simulate the pull-through test with the Abaqus/Explicit finite element solver. The results of the analysis point out that the implemented progressive damage laws are capable of achieving an appreciable experimental-numerical correlation, both from the qualitative and the quantitative standpoint. Therefore, the combined experimental-numerical approach is promising for developing a validated numerical tool capable of
Novembre, Edoardo, Cacchione, Benedetta, Janszen, Gerardus, Brunori, Filippo, Airoldi, Alessandro
Circular Acoustic Black Holes Integrated into Carbon/Epoxy Stiffened Panels for Noise ControlF-0080-2024-12455/7/2024
Carbon fiber reinforced epoxy composite stiffened panels are increasingly being used for structural components in large transport rotorcraft. However, problems are arising with high levels of vibration and interior noise due to the increased stiffness-to-density ratio of composites. The current investigation explores the potential of reducing vibrations in carbon/epoxy stiffened panels with the integration of acoustic black holes (ABH), namely features that incorporate a power law thickness taper. The proposed approach involves designing a taper into the thickness of the blade stiffeners as well as the thin plate. Integration of ABHs into the fuselage structure has the potential to reduce broadband vibrations. Multiple parametric studies with either an ABH integrated into the blade stiffener or a grid of ABHs integrated into the plate were conducted, and the tradeoffs between vibration amplitudes, panel mass, and compressive buckling load were examined. Carbon/epoxy panels were
Brown, Avery, Vlajic, Nicholas, Shepherd, Micah, Beck, Ben, Smith, Edward, Bakis, Charles, Robertson, Noah, Patel, Bhavya
Manufacturing of Thermoplastic Composite Parts with Press Forming TechnologyF-0080-2024-13625/7/2024
Thermoplastic composites are serious competitor for classic epoxy composites. They have comparable properties to epoxy composites, but characterize much lower processing costs. There are several methods of manufacturing the components from thermoplastic composites. One of the most interesting method in terms of efficiency is thermoforming on a press. This technology allows to product of the aircraft parts such as: ribs, brackets, covers, stiffeners. Thermoplastic composites are resistant to most solvents such as grease, oil and aviation fuel. They are also non-flammable and heat-resistant. This all makes them suitable for use in aircraft as upholstery, casing or elements around the tank. PZL Mielec has been developing press thermoforming technologies since 2016 and is the owner of the several patents in this area.
Głodzik, Marcin, Wojtuszewski, Radosław, Farbaniec, Konrad, Sienicki, Jarosław, Banaś, Aleksander, Gałaczyński, Tomasz
Dynamic Mechanical and Thermal Properties of Polymer-Coated Jute Fibers for Enhanced Automotive Parts2024-01-50192/12/2024
Automobile parts often require materials that offer high strength and durability. With the continuous push for environmentally friendly solutions, natural fibers such as jute have emerged as a potential alternative for synthetic fibers in automobile components. In this study, we aim to enhance the properties of jute fibers by coating them with different polymers and assessing their suitability for automotive applications. We treated jute fibers with various polymers—low-density polyethylene, polyester, and araldite epoxy. The performance of these treated fibers was compared using fiber tensile experimentation, differential calorimetry, and dynamic mechanical evaluation. Our findings reveal that the treated jute fibers exhibit a tensile strength of 598 MPa. However, when coated with polymers, there’s a variance in strength: polyethylene (263 MPa), polyester (191 MPa), and epoxy (281 MPa). Among these, epoxy-coated fibers displayed the least tensile strength, while polyethylene-coated
Natrayan, L., Kaliappan, Seeniappan, Balaji, N., Mahesh, V.
Effect of environmental factors on the function of an Automotive Luggage Cover of a passenger vehicle – A case study2024-26-02281/16/2024
Abstract: - Automobile OEMs, universally, have always given high priority to the Luggage Area of the vehicle. Luggage Area primarily includes a Load Floor (the load bearing part), Side & Rear garnishes & the Luggage Shelf (or the Parcel Tray) for covering the luggage. The Parcel Tray makes the Luggage Area look neat and aesthetically appealing & is occasionally also used for carrying small items like files, papers, cushion, tissue box etc. The article under consideration in this paper is a Luggage Cover made from thermoplastic composite such as PP-Compounds (with Glass-fiber or Wood-powder), with rotating hinges towards the cabin side. Such types of Covers are predominantly in use in many markets including India. In the vehicle, the Luggage shelf is suspended on the Side Trims or Garnishes & has an elastomer interface with the back Door. The back door tends to be opened and closed in frequent intervals and the elastomer tends to harden with time. This leads to increased load on
Sreejith, M P, Khandelwal, Lokesh, Sandilya, Arnab, Natu, Mandar R, Ray, Amulya Kali, Handa, Rajat
Automated Fiber Placement Double in-Situ Manufacturing Technology of Thermoplastic Composites ComponentsF-0079-2023-181045/16/2023
Glodzik, Marcin, Krauze, Wojciech, Wojtuszewski, Radoslaw, Banas, Aleksander, Farbaniec, Konard, Sienicki, Jaroslaw, Galaczynski, Tomasz
A Holistic Comparison of a Trailing Edge Rib Demonstrator Made with Three Different PEEK Thermoplastic Composite Form Factors: Unidirectional, Fabric and BraidF-0079-2023-181015/16/2023
Lopez, Alfonso, Kariyawasam, Supun, Postera, Richard, Carrol, Brennan, Spangler, Joe, Seneviratne, Waruna, Leach, David, Wood, Billy
Optimization of Buckling Load of Thin Hybrid Composite plate of Carbon/Glass Epoxy using Taguchi Approach2022-28-050211/18/2022
The aim of the paper is to analyze the effect of the design factors on the buckling load of the thin hybrid laminated composite plate made of Carbon/Glass Epoxy fiber. The detailed investigation is done on the stacking sequence, stacking angle, cut-out orientation whose shape is elliptical and thickness of the plate. For optimization the Taguchi approach of Design for Experiments (DOE) is being considered. For obtaining the combinations L16 orthogonal array is implemented using MINITAB and analysis is carried using ANSYS software. Analysis of each factor is done and significance of each factor is decided based on the 0.05 confidence level. Normal Probability and Residual versus Fitted Values plot is being obtained. Based on the delta values rank for each factor which have four levels are given. The boundary condition of simply supported on all edges is considered during the simulation for calculating the critical buckling load.
Gore, Renuka, Bhaskara Rao, Lokavarapu
High performance unfilled polypropylene material for light weight interior trims2022-01-03933/29/2022
Light weighting is important to improve energy efficiency in the automotive industry. In this paper, high performance unfilled polypropylene copolymer (PPCP) material was selected and developed to reduce weight and cost without compromising on functional requirements for interior trims such as door trims, lower pillar trims, scuff trims and rear quarter trims (RQT). Interior trims are loaded with challenging requirements such as stiffness, dimensional stability, haptic feel, scratch resistance, cleanability, thermal stability, toughness, low emission and weathering resistance. Reactor polymerised PPCP material compound met these requirements by having ultra-flow behaviour, optimum tensile strength, balanced modulus - impact strength, scratch resistant, low emission and improved thermal properties. The combination of material, optimized part and tool design led to weight savings and considerable cost reduction.
Govindaraj, Karthik, Deoli, Manish, Gregory, Koch
Wear and Friction of PTFE and PEEK Coated Cast Iron Piston Ring 2022-01-03803/29/2022
In engine 30% of the total energy is lost due to the friction between piston ring and cylinder liner due to their constant rubbing motion. A piston that reciprocates at high speeds has piston rings that constantly scrape against the wall leading to high frictional losses within the engine. The engine has to work against this resistance to provide the required power, and hence it will consume more fuel. For this reason, material used for these components is more crucial. Reduction of surface friction between moving parts in order to increase overall efficiency can be achieved by suitable coating. The most commonly used piston rings are coated with chromium layers that are electroplated which is being replaced by chrome plating. Low coefficient of friction (COF) and high wear resistance can be achieved by self-lubricating coating of PTFE and PEEK polymer-based composite coatings. Experimental results showed that the PEEK and PTFE coating performed better in terms of friction and wear
Rajendran, R.
Morphological Characterization of ABS and PC-ABS Surfaces for Automotive Industry2022-01-03953/29/2022
In the automotive industry, the measurement, control and reproducibility of certain morphological characteristics of surfaces are increasingly required since the surface morphology may be able to explain a large number of physical and mechanical characteristics, such as the degree of wear or the degree of adhesion by adhesives, glues or paints on the surfaces themselves. In this regard, the work is based on the study of ISO-25178 surface morphological parameters capable of completely characterizing a polymeric surface from a microstructure point of view. In particular, this work studies different surfaces in Abs (Acrylonitrile butadiene styrene) and PC-Abs (Polycarbonate/acrylonitrile butadiene styrene) material after different etching treatments performed with different chemical elements: these treatments can radically modify the micro-roughness of a surface making it more or less suitable according to the industrial purposes sought. In addition, the work wants to identify which set
Deninno, Gianluca
Impact of chemical blowing agent on polypropylene properties2021-28-020310/1/2021
Weight reduction and material saving goals in automotive applications have led to the processing of thermoplastic polymers by foam injection molding. The density of the foamed polymer can be reduced up to 20%. Whilst, work has been reported on the weight reduction of the foamed polymer by using different types of blowing agent technologies, there has been limited studies in the areas of the sound transmission loss and material dampening properties of these materials. The present study is intended to understand the effect of chemical blowing agent (CBA) on the properties of polypropylene. The molded specimens were characterized against the density, Tensile property, flexural property, Izod impact, heat deflection temperature, differential scanning colorimetry (DSC), thermogravimetric analysis (TGA), Fourier transform infra-red spectroscopy (FT-IR), sound transmission loss (STL) properties as per standard test protocol and cell structures by stereo microscope. Obtained results indicates
Shukla, Sandeep Kumar, Balaji, K V
Packing, Preformed (PTFE) - AMS3668, SealAS9956B (Current)8/19/2021
SCOPE IS UNAVAILABLE.
A-6C2 Seals Committee
Molded or Extruded Bar, Rod, and Shapes Produced from 20% Graphite – 3% Polytetrafluoroethylene (PTFE) Filled Polyamide-Imide (PAI) MaterialAMS3670/2C (Current)5/19/2021
This specification covers molded or extruded bar, rod, and shapes produced from a polyamide-imide (PAI) polymer filled with 20% graphite and 3% polytetrafluoroethylene (PTFE). This is designated as Grade 2 material per AMS3670.
AMS P Polymeric Materials Committee
Bar, Rod, and Shapes Produced from 12% Graphite - 3% Polytetrafluoroethylene (PTFE) Filled Polyamide-Imide (PAI) MaterialAMS3670/3C (Current)5/19/2021
This specification covers molded or extruded bar, rod, and shapes produced from a polyamide-imide (PAI) polymer filled with 12% graphite and 3% polytetrafluoroethylene (PTFE). This is designated as Grade 3 material per AMS3670.
AMS P Polymeric Materials Committee
Interlaminar Properties Improvement of Nanocomposites Using Coiled Nanomaterials2021-01-00273/2/2021
In this research helical Carbon Nanotubes (CNTs) with various weight percentages as an additional reinforcement were used. The objective was to investigate the effectiveness of helical geometries of the CNTs to form interlocking mechanisms with the resin and the traditional microfiber reinforcements to improve the overall performance of the composite structures and assemblies. In this study, ASTM D2344/2344M-16 is used to study the short beam strength of the laminated nanocomposites and evaluate the benefit of the mechanically interlocked helical CNTs reinforcement. Overall, three sets of composite laminates (i.e., with neat epoxy, and with two different wt% of Helical CNTs reinforced epoxy) were fabricated per ASTM standard D2344/2344M-16. Adequate test specimens were prepared and then they were tested per ASTM standard. The test results were analyzed and evaluated to determine the effects of helical CNTs on short beam strength of the laminated nanocomposites.
Sritharan, Ramanan, Askari, Davood
Eco-profiling of Bio-epoxies via Life cycle AssessmentSAE-PP-002312/3/2021
Epoxies, synthesized from bisphenol-A (BPA) and epichlorohydrin (ECH), are predominantly used as coatings, adhesives, and as matrix material in fiber-reinforced composites for body-in-white (BiW) applications in the automotive sector. However, given the production of conventional epoxies from non-renewable petroleum resource and toxicity of BPA, several initiatives have been undertaken by researchers to synthesize alternative epoxies from various bio-sources that are free of BPA and exhibit similar mechanical performance. As a result, such bio-sourced epoxies are almost immediately termed as “eco-friendly”, despite the lack of comprehensive evaluation of their ecological performance that takes into account enhanced natural resource usage and associated impacts accompanying such epoxies. Hence, this work aims at addressing this gap by evaluating the environmental impacts of such bio-sourced epoxies via cradle-to-gate life cycle assessment to determine the genuine credentials of their
Anthony, Lindsay, Jackson, Alyssa
Adapting to Manufacturing Challenges of COVID-19TBMG-385552/1/2021
The COVID-19 pandemic has caused great changes and challenges, disrupting not only the global marketplace but also the supply chains that keep people and essential businesses healthy and functioning. For example, amid an already growing market for infection-control gear and hygienic products made of nonwoven thermoplastic fabrics, COVID-19 has greatly strained and helped to reshape the global supply chain for nonwoven personal protective equipment (PPE).
Mixing Silk with Polymers Could Lead to Better Biomedical ImplantsTBMG-3785710/1/2020
By combining silk, which is safe for use in the human body, with synthetic compounds, one research team is getting closer to developing new implantable composite materials with the best properties of both. Potential applications could include structures that hold bone in place after surgery or replacements for the cartilage cushions in the knee.
Process Creates Soft Actuated Objects Using Commercial Knitting MachinesTBMG-373848/1/2020
Computationally controlled commercial knitting machines were used to create knitted objects that are actuated by tendons. New software makes it possible for the objects to emerge from the knitting machines in their desired shapes and with tendons already embedded. They can then be stuffed and the tendons attached to motors as necessary.
INSULATION SLEEVING, ELECTRICAL, HEAT SHRINKABLE POLYTETRAFLUOROETHYLENEAS23053/12A (Historical)4/21/2020
AE-8D Wire and Cable Committee
High-Area Rapid 3D PrintingTBMG-363874/1/2020
High-Area Rapid Printing (HARP) enables a record-breaking throughput that can manufacture products on demand. The prototype HARP system is 13 feet tall with a 2.5-square-foot print bed and can print about half a yard in an hour. It can print single, large parts or many different small parts at once.
Eco-profiling of Bio-epoxies via Life Cycle Assessment13-01-01-00033/25/2020
Epoxies, synthesized from bisphenol-A (BPA) and epichlorohydrin (ECH), are predominantly used as coatings, adhesives, and matrix material in fiber-reinforced composites for body-in-white (BiW) applications in the automotive sector. However, given the production of conventional epoxies from nonrenewable petroleum resource and toxicity of BPA, several initiatives have been undertaken by researchers to synthesize alternative epoxies from various bio-sources that are free of BPA and exhibit similar mechanical performance. As a result, such bio-sourced epoxies are almost immediately termed as “ecofriendly,” despite the lack of comprehensive evaluation of their ecological performance that takes into account enhanced natural resource usage and associated impacts accompanying such epoxies. Hence, this work aims at addressing this gap by evaluating the environmental impacts of such bio-sourced epoxies via cradle-to-gate life cycle assessment (LCA) to determine the genuine credentials of their
Kousaalya, Adhimoolam Bakthavachalam, Iyer, Rakesh Krishnamoorthy, Pilla, Srikanth
Nylon Provides Building Block for Electronic DevicesTBMG-3551411/1/2019
Thin nylon films are several 100 times thinner than human hair and could thus be attractive for applications in bendable electronic devices or for electronics in clothing. The researchers developed a method to fabricate ferroelectric nylon thin-film capacitors by dissolving nylon in a mixture of trifluoroacetic acid and acetone and solidifying it again in vacuum. They were able to realize thin nylon films that are typically only a few hundred nanometers thick.
Thin Nylon Films for Transparent Electronic DevicesTBMG-3525510/1/2019
Very thin nylon films were created that can be used in electronic memory components. The films are several hundreds of times thinner than a human hair and could be used in bendable electronic devices or for electronics in clothing.
High-Speed 3D Printer for High-Performance PlasticsTBMG-3526210/1/2019
3D printers that build small parts layer by layer from melted plastic can take up to an hour to produce a pocket-sized piece. This process is far too slow for the mass-production of components as required by the automotive industry, for instance.
Clamp Material, Injection MoldedAIR1397B (Current)9/26/2019
This report presents the material properties and test requirements for an injection molded thermoplastic compound utilized for fabrication of AS1396 clamp block assembly.
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
Automotive Engineering: September 201919AUTP099/1/2019
Engineering the 2020 Chevrolet Corvette The eighth-gen (C8) Corvette is a creative mix of novel and traditional technical solutions - unleashed at a shockingly low base price. Stuck on structural adhesives As the need for lighter materials and enhanced body performance intensifies, structural adhesives flourish as a materials-joining solution. Rethinking ADAS materials New specialized thermoplastics offer greater design freedom to improve sensor performance and packaging, at reduced cost. Inside VW's expanding Silicon Valley lab The pioneering California innovation hub enters its third decade on a new wave of innovation. Editorial There is no substitute for 'Automotive Grade' Standards News SAE embraces micromobility and its macro challenges Supplier Eye The value - and risks - of Technology Testbeds What We're Driving Latest mass-reducing innovations honored by Altair GM underway with plan to build U.S. electric-vehicle charging infrastructure Ford 'cranks' it up with another big V8
Hierarchically Organized Nanocomposites for Enhanced Fatigue Life of Rotorcraft ComponentsF-0075-2019-147225/13/2019
Rotorcraft components, which are often made with reinforced fiber composites, are subjected to severe fatigue loadings due to increased performance demands. Therefore, considerable research interest exists in improving fatigue life of conventional fiber reinforced composites. Nanocomposites are a new class of materials which seek to improve mechanical performance of materials by creating nanoscale crack-nanofiller interactions. In this study we demonstrate the fatigue life improvement of conventional composites by addition of SiO2 nanofillers. The epoxy resin was initially modified with nanofillers to test the static fracture toughness. Once the improvement in static facture toughness was confirmed, three phase modified fiber reinforced composites were made using the modified resin. Cyclic tests were performed at various stress level which demonstrate that three phase nanocomposites perform better than conventional fiber reinforced composites. Fractographic analysis suggests that
Kamble, Mithil, Lakhnot, Aniruddha, Picu, Catain, Koratkar, Nikhil
Composite Advances Lignin as Renewable 3D Printing MaterialTBMG-339353/1/2019
Lignin is the material left over from the processing of biomass. It gives plants rigidity and also makes biomass resistant to being broken down into useful products. Researchers combined a melt-stable hardwood lignin with conventional plastic, a low-melting nylon, and carbon fiber to create a composite with just the right characteristics for extrusion and weld strength between layers during the printing process, as well as excellent mechanical properties.
Insulation Sleeving, Electrical, Heat Shinkable, PolytetrafluoroethyleneAMSDTL23053/12B (Current)12/7/2018
The requirements for acquiring the sleeving described herein shall consist of this specification sheet and the issue of the following specification listed in that issue of the Department of Defense Index of Specifications and Standards (DODISS) specified in the solicitation: MIL-DTL-23053.
AE-8D Wire and Cable Committee
Ultralight Gloves Provide Realistic Haptic FeedbackTBMG-3338212/1/2018
Engineers and software developers are seeking to create technology that lets users touch, grasp, and manipulate virtual objects while feeling like they are actually touching something in the real world. An ultralight glove — weighing less than 8 grams per finger — was developed that enables users to feel and manipulate virtual objects. The system provides extremely realistic haptic feedback and could run on a battery, allowing for freedom of movement.
Research Collaboration Could Reshape Injection MoldingTBMG-3308810/1/2018
As Ralph Colby peers at the microscope image in front of him, he thinks he can make them out — “shish kebabs,” as polymer scientists call them. Nobody knows for sure what they are, but these shapes that appear at seemingly unpredictable times when certain plastics cool have a big impact on the overall properties of plastics. It's not a big deal when a plastic fork breaks, but if a bearing cage on an airplane were to break, it could put people in danger.
Tech Briefs: August 201818AERP088/1/2018
Designing a High-Speed Decoy Unmanned Aerial Vehicle (UAV) Using Thermoplastics in Aerospace Applications In-Flight Real-Time Avionics Adaptation Using Turbine Flow Meters for Aerospace Test and Measurement Applications Communicating from Space: The Front End of Multiscale Modeling Laser-Based System Could Expand Space-to-Ground Communication Hydraulic Testing of Polymer Matrix Composite 102mm Tube Section Research could lead to development of a composite material that can be processed at a low temperature and still be used at 1000°F. Permeation Tests on Polypropylene Fiber Materials Study attempts to determine if polypropylene nanofiber materials can be used in air filtration systems to remove toxic vapors. Inter-Laboratory Combat Helmet Blunt Impact Test Method Comparison Ensuring consistent test methods could reduce the risk of head injuries.
Design Development of Lightweight Thermoplastic Composite Cargo Floor for Helicopter ApplicationF-0074-2018-128205/14/2018
ABSTRACT The ability to construct a composite, semimonocoque, damage-resistant, cargo floor for a rotary wing application using an IM7 graphite/polyetheretherketone (PEEK) composite with in-situ tape-placement fabrication technology has been demonstrated. Through an evolutionary process, a damage-tolerant thermoplastic composite cargo floor was designed according to realistic requirements, and subelement representative structures were developed to verify the design viability and approach. The fabricated and tested structural composite floor subelements demonstrated the feasibility of the technology, illustrated the ability to customize the design to meet unique cargo floor properties (e.g., cargo-loading features), and validated the maturity of the approach and fabrication technology for rotary-wing applications.
Luzetsky, Harry, Michasiow, John
Development of Techniques for Composite Parts Failure Analysis in Static and Fatigue Mode - Application on Thermoset and Thermoplastic Materials for Rotorcraft Main Rotor Hub AnalysisF-0074-2018-128875/14/2018
ABSTRACT A model defined at the ply scale to predict the failure of laminated composites for static or fatigue loading is proposed. The model describes the loss of strength in the fiber direction for a significant level of transverse damage. This meso-scale model has been characterized on woven ply laminates used for rotorcraft dynamic components, such as glass/epoxy of Starflex®, carbon fiber/epoxy, and carbon fiber/PEEK of H160 main rotor hub. Failure behavior prediction at coupon level has been validated regarding static and fatigue failure mode in tension for epoxy resin woven ply laminates. Characterizations have been also provided for PEEK resin in balanced woven ply laminate, regarding static or fatigue failure mode. Those activities are crucial to increase the level of confidence in failure model, to rely on virtual testing at coupons level, and to better predict damage and failure at component level. This work intends to support the building block approach during development
Herman, Mélanie, Hochard, Christian, Besson, Jean-Marc, Charles, Jean-Paul, Boulebbad-Gomez, Nassira, Lahellec, Noël
POLYTETRAFLUOROETHYLENE (PTFE) HOSE ASSEMBLIES (WIRE REINFORCED) FOR MEDIUM AND HIGH PRESSURE FLUID SYSTEMS IN AIRCRAFTTSC47-012_044/19/2018
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Carbon Fiber/Epoxy Mold with Embedded Carbon Fiber Resistor Heater - Case Study05-11-02-00114/7/2018
The article presents a complete description of the design and manufacturing of a Carbon Fiber/epoxy mold with an embedded Carbon Fiber resistor heater, and the mold performances in terms of its surface temperature distribution and thermal deformations resulting from the heating. The mold was designed for manufacturing aileron skins from Vacuum Bag Only prepreg cured at 135°C. The glass transition temperature of the used resin-hardener system was about 175°C. To ensure homogenous temperature of the mold working surface in the course of curing, the Carbon Fiber heater was embedded in a layer of a highly heat-conductive cristobalite/epoxy composite, forming the core of the mold shell. Because the cristobalite/epoxy composite displayed much higher thermal expansion than CF/epoxy did, thermal stresses could arise due to this discrepancy in the course of heating. Therefore, to lower these stresses, the Carbon Fiber/epoxy faces were separated from the cristobalite/epoxy core containing the
Czarnocki, Piotr, Boczkowska, Anna, Frączek, Wojciech, Chabera, Paulina, Kubis, Michał, Marjanowski, Jędrzej
Making the Gas Assist Plastic Molding Process Work for Medical ApplicationsTBMG-283612/1/2018
Gas assist molding offers a variety of process and design advantages for medical equipment applications. It produces parts that are smooth and extremely cleanable, while offering increased strength and rigidity, weight reduction, design flexibility, and improved surface finish. Gas assist may also lower production costs by reducing cycle time compared with producing solid sections.
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