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DESIGN & STATIC STRUCTURAL ANALYSIS OF COMPOSITE PROPELLER SHAFT: A COMPARATIVE STUDY2026-26-0297To be published on 01/16/2026
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
Dynamic Mechanical and Thermal Properties of Polymer-Coated Jute Fibers for Enhanced Automotive Parts2024-01-501902/12/2024
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.
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
An Integrated Approach for Simulation of the RTM Process2022-01-038703/29/2022
In the preform preparation stage of the RTM process, the fabric is draped on the mold along the geometry. Before the filling and warpage analysis, the draping analysis will be performed to get the fabric orientation. Due to the anisotropy of the fabric material, the main direction of the material has a significant influence on the overall flow behavior and warpage of the product. In this study, the advanced simulation approach for the RTM process is demonstrated. The filling and warpage analysis integrate with the draping simulation result from AniForm. The influences of fabric shearing and fiber orientation on the resin flow and warpage in RTM process is studied. With more accurate fabric orientation prediction methods, the accuracy of predicting fabric ply orientation is improved and more accurate infusion and product warpage simulation results can be obtained.
Bora, Anand
Interlaminar Properties Improvement of Nanocomposites Using Coiled Nanomaterials2021-01-002703/02/2021
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
INSTALLING AND REMOVAL TOOLS, CONNECTOR, ELECTRICAL CONTACT, TYPE I AND II, CLASS 2, COMPOSITION BAS81969/10A (Current)01/26/2021
AE-8C2 Terminating Devices and Tooling Committee
Mixing Silk with Polymers Could Lead to Better Biomedical ImplantsTBMG-3785710/01/2020
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.
3D Printable Material Mimics Biological TissuesTBMG-3758209/01/2020
Researchers have 3D printed a complex, porous lattice structure using liquid crystal elastomers (LCEs), creating devices that can finally mimic cartilage and other biological tissues. LCEs are soft, multifunctional materials that are known for their elasticity and extraordinary ability to dissipate high energy.
Material “Shape-Shifts” in Response to External ForcesTBMG-3747808/01/2020
A self-adapting material was developed that can change its stiffness in response to the applied force. This advancement can someday open the door for materials that can self-reinforce to prepare for increased force or stop further damage; for example, a bone implant or a bridge that can self-reinforce where a high force is applied without inspection and maintenance.
Advancements in Thermoplastic Optical Materials for Automotive Lighting Systems2020-01-063404/14/2020
Described are strategies to maximize the performance and efficiency of long path length acrylic optical elements through material selection and manufacturing optimization. Recent LED lamp designs include functional optical elements such as light pipes and dispersion optics that channel LED light through long optical path lengths (LOPL), 5-80 cm in length. Typically, these elements are manufactured from thermoplastic optical materials such as PMMA or PC through injection molding. However, conventional thermoplastic optical materials are not suitable for LOPL application due to insufficient luminous transmission and high absorption coefficients, resulting in inadequate lamp function and poor efficiency. Furthermore, the effects of molding conditions on LOPL performance are poorly understood. Recent advancements in acrylic technology produced optimized materials for LOPL signature lighting optics: Plexiglas® HT121-LPL® and V825T-LPL® resins. Compared to conventional acrylic resins, these
Cromer, Brian, Thoma, Laura, Macy, Noah, Rissel, Charles
Durability Study of Automotive Additive Manufactured Specimens2020-01-095704/14/2020
The long-term weathering behavior of three different 3D printable, non-stabilized, UV cure resin formulations (A and B with thiol-ene base, and C with acrylate chemistry) was studied using tensile testing, nano-indentation, and photoacoustic infrared (FTIR-PAS) spectroscopy. To this end, type I tensile bars were printed from each resin system using a 3D printer, and were post UV-cured under a broad spectrum source. Systems A and C showed a similar trend after weathering. They first experienced an increase in modulus and tensile strength, due to additional crosslinking of the residual unreacted species. This increase in mechanical properties was followed by a drop in modulus, tensile strength, and percent elongation, due to the over-crosslinking and consequent embrittlement. System B, however, showed remarkable retention of the mechanical properties before/after weathering. Nano-indentation results were in good agreement with the tensile properties, showing a similar trend in hardness
Zareanshahraki, Forough, Davenport, Amelia, Cramer, Neil, Seubert, Christopher, Lee, Ellen, Cassoli, Matthew
High-Area Rapid 3D PrintingTBMG-3638704/01/2020
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.
5 Ws of Microlattice Pads for Improved HelmetsTBMG-3598402/01/2020
Football players and other athletes, motorcycle riders, soldiers, and anyone wearing protective helmets made with the new microlattice pads will have greater protection from both single hits and a series of impacts.
Primer, Anodic Electrodeposition for Aircraft ApplicationsAMS3144A (Current)10/17/2019
This specification establishes the requirements for a waterborne, corrosion inhibiting, chemical and solvent resistant, anodic electrodeposition epoxy primer capable of curing at 200 to 210 °F (93 to 99 °C).
AMS G8 Aerospace Organic Coatings Committee
Influence of Amount of Phenolic Resin on the Tribological Performance of Environment-Friendly Friction Materials2019-01-210509/15/2019
The binder in friction materials (FMs) plays a very crucial role which binds all the ingredients firmly so that they can function the way they were supposed to do. The type and amount of binder, both are very critical for manipulating the desired performance properties, which mainly include friction and its sensitivity towards operating parameters, wear resistance, counter-face friendliness, noise, vibration etc. Although a lot is reported on the influence of types of resins on tribo-performance of FMs, hardly any paper pertains to paint this on a bigger canvas with more detailed understanding of the amount of resin in FMs on the performance properties. The present study addresses these aspects by developing brake-pads with identical composition but varying in amount (wt. %) of straight phenolic resins (6, 8, 10 and 12) by compensating the difference with barite, a space filler. The ingredients did not contain asbestos, Copper, Zinc, etc. and hence were environment friendly
Kalel, Navnath, Bijwe, Jayashree, Darpe, Ashish
Aging Effect on Disc Pad Properties2019-01-210809/15/2019
One low-copper formulation and one copper-free formulation were made into disc pads, and both of them were cured under 4 different conditions. These pads had no backing layer and no scorched layer. Pad thickness, dynamic modulus and natural frequencies were continuously monitored over a period of 12 months. After 12 months at room temperature, pad thickness, dynamic modulus and natural frequencies all increased to higher values. The low-copper formulation increased relatively rapidly during the first 60 days and the copper-free formulation increased relatively rapidly for the first 90 days, and then slowly thereafter. Two competing processes are found to be taking place simultaneously; internal stress relief leading to pad expansion and cross-linking of the resin leading to pad shrinkage. As the pad properties are changing continuously, the timing of property measurement becomes an important issue for quality assurance. Implications of these changing properties are discussed for
Sriwiboon, Meechai, Rhee, Seong K., Kaewlob, Kritsana, Tiempan, Nipon
Combining Origami and 3D Printing to Make Complex Structures in One StepTBMG-3475107/01/2019
There are many different types of 3D printing technologies. The most familiar — inkjet — has been around for some 20 years. But until now, it has been difficult to create 3D-printed structures with the intricate hollow features associated with complex origami because removing the supporting materials necessary to print these structures is challenging. Further, unlike paper, the 3D-printed materials could not be folded numerous times without breaking. Making such structures has involved multiple steps, more than one material, and assembly from smaller parts.
Portable, Wearable, Ultrasound TransducerTBMG-3358001/01/2019
Researchers have developed a new ultrasound transducer that could dramatically lower the cost of ultrasound scanners to as little as $100. Conventional ultrasound scanners use piezoelectric crystals to create images of the inside of the body and send them to a computer to create sonograms. The piezoelectric crystals were replaced with tiny vibrating drums made of polymer resin, called polyCMUTs (polymer capacitive micromachined ultrasound transducers), which are cheaper to manufacture.
Cementitious-Based Brake Pads Technology: Performance, Low Energy Consumption, Emission Drop2018-01-186710/05/2018
Brake pads employing innovative hydraulic inorganic binders in place of common state-of-the-art thermosetting phenolic resins have been produced by means of a unique prototypal equipment and a distinctive manufacturing process. The unicity of the process enables us to exclude completely any thermal cycle in the manufacturing steps, with a considerable positive energy balance compared to the standard counterpart. Realized brake pads have indeed been successfully tuned to meet the braking performances of phenolic counterparts. In the present work our latest efforts in this field are illustrated, focusing our attention to three main areas of interest: performance, energy consumption, volatile organic emissions. One selected exponent of our cementitious-based material is reported, demonstrating its capability of matching both standard OE and AM braking performances (investigated through a full scale brake dynamometer by SAE J2522 procedure), and its feasibility to be released as an actual
Sanguineti, Alessandro, Samela, Alessandro, Rampinelli, Flavio, Bottalico, Luca, Ranza, Luigi, Romeo, Marco, Bonfanti, Andrea
Carbon Fiber/Epoxy Mold with Embedded Carbon Fiber Resistor Heater - Case Study05-11-02-001104/07/2018
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
Fluorinated Alkyl Ether Epoxy Resin Compositions and Applications ThereofTBMG-2816801/01/2018
NASA Langley Research Center has developed fluorinated alkyl ether-containing epoxies designed as an anti-insect coating. The robust and durable coating was developed to improve aircraft efficiency, but the coating could be useful in a variety of applications where reduction of insect residue adherence is desirable, such as in automotive and wind energy industries.
Dental Material Resists Plaque, Kills MicrobesTBMG-2819912/27/2017
Researchers have evaluated a new dental material tethered with an antimicrobial compound that not only kills bacteria but also resists biofilm growth. In addition, unlike some drug-infused materials, it is effective with minimal toxicity to the surrounding tissue, as it contains a low dose of the antimicrobial agent that kills only the bacteria that come in contact with it.
POTTING COMPOUND, EPOXY Bisphenol A-Type Unfilled, Room Temperature Cure, SemiflexibleAMS3731/10C (Current)11/29/2017
This specification covers an unfilled, room-temperature-polymerizing epoxy resin formulation with a polyamide hardener, supplied as a two-component system.
AMS P Polymeric Materials Committee
Resistive Heating-Assisted Infiltration and Cure (RHAIC) for Polymer/Carbon Nanotube Structural CompositesTBMG-2754609/01/2017
NASA’s Langley Research Center scientists have developed a process for fabricating carbon nanotube (CNT) structural nanocomposites that brings CNT-based composites closer to realizing their potential for structural applications. Conventional methods fail to properly wet CNTs within the epoxy matrix due to high resin viscosity, resulting in poor infiltration and reduced load transfer between the CNTs and matrix. The NASA process — resistive heating-assisted epoxy infiltration (RHAEI) — uses the CNTs’ electrical resistance to generate heat, which reduces epoxy resin viscosity for greater CNT wetting and adhesion. Mechanical properties are significantly improved compared to conventional methods. NASA’s process has been demonstrated to offer 50% improvement in strength and elastic modulus, with mechanical properties competitive with structural carbon fiber composites.
Adam Sidor, NASA Research Fellow, Georgia Institute of Technology, Atlanta, GATBMG-2710206/20/2017
Thermal Protection Systems (TPS) — heatshields — form the outer surface of spacecraft and provide protection as the vehicle plunges through planetary atmospheres. Conformal ablative materials are currently being developed to improve TPS performance. Adam Sidor is developing a fresh approach to designing and manufacturing these materials to produce larger tile sizes while reducing labor, cost, and waste.
Polyimides Derived from Novel Asymmetric Benzophenone DianhydridesTBMG-2685105/01/2017
NASA's Glenn Research Center invites companies to license or establish partnerships to develop its patented high-temperature, low-melt imide resins for fabrication of automotive components. Produced by a solvent-free melt process, these resins exhibit high glass transition temperatures (Tg = 370 to 400 °C), low melt viscosities (10 to 30 poise), long pot-life (1 to 2 hours), and can be easily processed by low-cost RTM and vacuum-assisted resin transfer molding (VARTM). These RTM resins melt at 260 to 280 °C, and can be cured at 340 to 370 °C in 2 hours without releasing any harmful volatile compounds.
Automotive A/C Servicing – Refrigerant Flushing of a Failed A/C System2017-01-016703/28/2017
The failure of an A/C system often results in the introduction of contaminants to the A/C system. The sources of the contaminants include debris from damaged components and debris from the surrounding environment. Returning the A/C system to service requires the removal of these contaminants from any reused components. The recommended approach to cleaning contaminated components and systems is to flush with a solvent flushing machine. Previous internal studies have concluded that solvent flushing will remove all contaminants, restoring component and system performance. Many commercial refrigerant recovery and recharge machines include a refrigerant “flush” feature which can flush oil from the system and components with the systems refrigerant. The effectiveness of using the “flush” feature of a refrigerant recovery and recharge machine with an added in-line filter to remove contaminants is investigated. One gram of Arizona Test Dust is introduced to the suction line of an automotive A
Lambert, Steven, Jamo, William, Kurtz, Mike
Marking of Plastic PartsJ1344_201703 (Current)03/28/2017
This SAE Recommended Practice provides a system for marking plastic parts to designate the type of material from which the part was fabricated.
Plastics Committee
Development of GFRTP Crush Box with Consideration of Use Environment and Effect of Fiber Orientation2017-01-049803/28/2017
Regulation of automotive CO2 emissions is becoming increasingly stringent throughout the world in response to global warming. For automakers, this means a focus not only on increasing the fuel economy of powertrains, but also on reducing automotive driving resistance. High expectations are held for thermoplastic fiber-reinforced plastics (FRP) for the realization of automotive weight savings while also offering high levels of productivity and recyclability. Thermoplastic FRP crush boxes display a higher level of energy absorption performance than metal (steel, aluminum, etc.) crush boxes. This will contribute to automotive weight savings and improved package design. In the case of automotive front bumper beam systems, it is necessary to realize stable load characteristics irrespective of the use environment. It is therefore necessary to consider the effects of temperature and thermoplastic resin degradation. The molding process for discontinuous fiber-reinforced FRP produces
Yabu, Tomoya, Yasuhara, Shigeto, Kashiwagi, Masakazu
Tire Tread Performance Modification Utilizing Polymeric Additives2017-01-150203/28/2017
Tire manufacturers have long grappled with the challenge of balancing the conflicting tire attributes of traction, rolling resistance, and treadwear. Improvements to one of these “magic triangle” attributes often comes at the expense of the other attributes. Recent regulations have further increased the pressure on manufacturers to produce optimized tires with minimal performance compromises. In order to meet this challenge, the tire industry is looking to new material systems beyond the traditional tire tread components. Polymeric materials beyond the base elastomers and processing oils used in tread provide opportunities to modify the physical and viscoelastic properties of tread. In this study, various polymeric materials were evaluated as additives in a model tire tread formulation. Hydrocarbon resin, high styrene resin, and thermoplastic styrene elastomers were added to the model formulation at various loading levels and through various addition strategies. The thermal behavior of
Harper, Madeline, Tardiff, Janice, Haakenson, Daniel, Joandrea, Maria, Knych, Matthew
Mechanoresponsive Healing PolymersTBMG-2634802/01/2017
NASA's Langley Research Center is developing an innovative self-healing resin that automatically reacts to mechanical stimuli. Current structural materials are not self-healing, making it necessary to depend on complicated and potentially destructive repair methods and long down times. Unlike other proposed self-healing materials that use microencapsulated healing agents, this technology utilizes viscoelastic properties from inherent structure properties. The resulting technology is a self-healing material with rapid rates of healing and a wide range of use temperatures.
Cloth, Organic Fiber, High Modulus Epoxy Resin Impregnated OC Style 181, 80 (180)AMS3903/6B (Current)11/11/2016
This specification covers one type of epoxy-resin-impregnated organic fibers in the form of woven cloth.
AMS P17 Polymer Matrix Composites Committee
Cloth, Organic Fiber, High Modulus Epoxy Resin Impregnated OC Style 281, 80 (180)AMS3903/7B (Current)11/11/2016
This specification covers one type of epoxy-resin-impregnated organic fibers in the form of woven cloth.
AMS P17 Polymer Matrix Composites Committee
Cloth, Organic Fiber, High Modulus Epoxy Resin Impregnated OC Style 328, 80 (180)AMS3903/8B (Current)11/11/2016
This specification covers one type of epoxy-resin-impregnated organic fibers in the form of woven cloth.
AMS P17 Polymer Matrix Composites Committee
Cloth, Organic Fiber, High Modulus Epoxy Resin Impregnated OC Style 120, 80 (180)AMS3903/5B (Current)11/11/2016
This specification covers one type of epoxy-resin-impregnated organic fibers in the form of woven cloth.
AMS P17 Polymer Matrix Composites Committee
Cloth, Organic Fiber, High Modulus Epoxy Resin Impregnated OC Style 328, 175 (350)AMS3903/4B (Current)11/11/2016
This specification covers one type of epoxy-resin-impregnated organic fibers in the form of woven cloth.
AMS P17 Polymer Matrix Composites Committee
Cloth, Organic Fiber, High Modulus Epoxy Resin Impregnated OC Style 120, 175 (350)AMS3903/1B (Current)11/10/2016
This specification covers one type of epoxy-resin-impregnated organic fibers in the form of woven cloth.
AMS P17 Polymer Matrix Composites Committee
Cloth, Organic Fiber, High Modulus Epoxy Resin Impregnated OC Style 281, 175 (350)AMS3903/3B (Current)11/10/2016
This specification covers one type of epoxy-resin-impregnated organic fibers in the form of woven cloth.
AMS P17 Polymer Matrix Composites Committee
Cloth, Organic Fiber, High Modulus Epoxy Resin Impregnated OC Style 181, 175 (350)AMS3903/2B (Current)11/10/2016
This specification covers one type of epoxy-resin-impregnated organic fibers in the form of woven cloth.
AMS P17 Polymer Matrix Composites Committee
Potting Compound, Epoxy Bisphenol A-Type Unfilled, Room Temperature CureAMS3731/1C (Current)09/22/2016
This specification covers a unfilled, room-temeperature-polymerizing epoxy resin formulation, supplied as a two-component system.
AMS P Polymeric Materials Committee
Potting Compound, Epoxy Bisphenol A-Type Filled, Room Temperature Cure, Low ExothermAMS3731/5C (Current)09/22/2016
This specification covers a filled, room-temperature-polymerizing epoxy resin formulation, supplied as a two-component system.
AMS P Polymeric Materials Committee
Potting Compound, Epoxy Bisphenol A-Type Impregnating Resin, Heat Cure, Single ComponentAMS3731/4C (Current)09/22/2016
Requiring an oven cure for attainment of maximum properties.
AMS P Polymeric Materials Committee
Potting Compound, Epoxy Flexible, Thermal Shock Resistant, Heat CureAMS3731/9C (Current)09/22/2016
This specification covers a flexibilized epoxy resin formulation, supplied as a two-component system, requiring an oven cure for attainment of maximum properties.
AMS P Polymeric Materials Committee
Potting Compound, Epoxy Bisphenol A-Type Syntactic Foam, Heat CureAMS3731/6C (Current)09/22/2016
This specification covers a glass or silica micosphere-filled epoxy resin formulation, supplied as a two-component system, requiring an oven cure for attainment of maximum properties.
AMS P Polymeric Materials Committee
Potting Compound, Epoxy Bisphenol A-Type Filled, Heat Cure, MachinableAMS3731/3C (Current)09/22/2016
This specification covers an epoxy resin formulation with fillers such as calcium carbonate, supplie as a two-component system, requiring an oven cure for attainment of maximum properties.
AMS P Polymeric Materials Committee
Potting Compound, Epoxy Bisphenol A-Type Filled, Room Temperature Cure, Low ShrinkageAMS3731/7C (Current)09/22/2016
This specification covers a filled, room-temperature-polymerizing epoxy resin formulation, supplied as a two-component system.
AMS P Polymeric Materials Committee
Potting Compound, Epoxy Bisphenol A-TypeAMS3731C (Current)09/22/2016
This specification and its supplementary detail specifications cover epoxy resin formulations based on diglycidyl ether of bisphenol A with an epoxide equivalent of 175-195. When properly mixed and cured, these resisns produce a rigid or flexible product.
AMS P Polymeric Materials Committee
Potting Compound, Epoxy Bisphenol A-Type Filled, Heat Cure, High HDTAMS3731/8C (Current)09/22/2016
This specification covers an epoxy resin formulation supplied as a two-component system, requiring an oven cure for attainment of maximum properties.
AMS P Polymeric Materials Committee
Potting Compound, Epoxy Bisphenol A-Type Filled, Heat Cure, Low CTE Thermal Shock ResistantAMS3731/2D (Current)09/22/2016
This specificiation covers a filled epoxy resin formulation, supplied as a two-component system, requiring an oven cure for attainment of maximum properties.
AMS P Polymeric Materials Committee
Alkali-Activated Inorganic Based Brake Pads: Realization and Performances of Alternative Friction Materials for a Concrete Industrial Application2016-01-191309/18/2016
Organic brake pads for automotive can be defined as brake linings with bonding matrix constituted of high-temperature thermosetting resins. Bonded together inside the polymeric binder are a mix of components (e.g. abrasives, lubricants, reinforcements, fillers, modifiers…), each playing a distinctive role in determining the tribology and friction activity of the final friction material. The herein reported work presents inorganic “alkali-activated”-based materials suitable for the production of alternative brake linings (i.e. brake pads), by means of an unconventional low-temperature wet process. Exploiting the hydraulic activity of specific components when exposed to an alkaline environment, such peculiar inorganic materials are capable of coming to a complete hardening without the need of traditional high-temperature energivorous procedures. The main advantages of these materials resides in: the decreased embodied energy of the employed raw materials, the reduction of process costs
Sanguineti, Alessandro, Tosi, Federico, Bonfanti, Andrea, Rampinelli, Flavio
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