Browse Topic: Plastics

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Wire, Electrical, Fluoropolymer-Insulated, Crosslinked Modified ETFE, Low Fluoride, Normal Weight, 80 Microinch Silver-Coated, High-Strength Copper Alloy, 200 °C, 600 Volt, ROHSAS22759/49C (Current)10/1/2025
SCOPE IS UNAVAILABLE.
AE-8D Wire and Cable Committee
Test Method for Determining Cold Cracking of Flexible Plastic MaterialsJ323_202109 (Current)9/15/2021
This SAE Recommended Practice is applicable for determining the cold characteristics of flexible plastic materials, as applicable. It consists of three different methods for determining low-temperature properties of materials depending on type of material and end use. The method used shall be as specified by the contractual parties.
Textile and Flexible Plastics Committee
Plastic Sheet and Strip, PolyimideAMSP46112B (Current)8/3/2021
This specification covers polyimide sheet and strip with or without heat sealable FEP-fluorocarbon coatings.
AMS P Polymeric Materials Committee
TUBING, PLASTIC, EXTRA FLEXIBLE, CONVOLUTED, HELICAL, ETHYLENE TETRAFLUOROETHYLENE (ETFE), CLOSE CONVOLUTIONAS81914/5C (Current)4/30/2021
AE-8C1 Connectors Committee
TUBING, PLASTIC, FLEXIBLE, CONVOLUTED, HELICAL ETHYLENE TETRAFLUOROETHYLENE (ETFE), STANDARD CONVOLUTIONAS81914/6C (Current)4/14/2021
AE-8C1 Connectors Committee
Q&A: Solid Silk - A Biocompatible, Sustainable, Degradable Building BlockTBMG-361753/1/2020
David Kaplan, Stern Family Professor of Engineering at Tufts University’s College of Engineering, and his team have developed a unique and practical method for processing silk into solid form for products such as rods and plates for medical implants.
Automated Production of Advanced MaterialsTBMG-360122/1/2020
Engineers have developed an automated way to produce polymers, making it much easier to create advanced materials aimed at improving human health. The innovation is a critical step in pushing the limits for researchers who want to explore large libraries of polymers, including plastics and fibers.
5 Ws of Microlattice Pads for Improved HelmetsTBMG-359842/1/2020
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.
3D Printing of Plastics with Electrical CircuitsTBMG-359732/1/2020
Engineers have embedded high-performance electrical circuits inside 3D-printed plastics, which could lead to smaller and versatile drones and better-performing small satellites, biomedical implants, and smart structures.
3D Printing Technique Produces “Living” 4D MaterialsTBMG-359582/1/2020
Repairing and reusing plastics and delivering cancer drugs more effectively are two of the many potential applications a new 3D/4D printing technology might have. The technology merges 3D/4D printing and photo-controlled/living polymerization — a chemical process to create polymers. 4D printing is a subset of 3D printing where the printed object can transform its shape in response to certain conditions. The new method uses visible light to create an environmentally friendly “living” plastic or polymer. Polymers can be synthetic, such as plastic, as well as biological; for example, DNA.
Liquid Flow Influenced by a Quantum Effect in WaterTBMG-360282/1/2020
Water is the basis of all life on earth. Its structure is simple — two hydrogen atoms bound to one oxygen atom — yet its behavior is unique among liquids, and scientists still do not fully understand the origins of its distinctive properties.
3D Printed Plastics with High-Performance Electrical CircuitsTBMG-357711/1/2020
Engineers have embedded high-performance electrical circuits inside 3D printed plastics, which could lead to better-performing biomedical implants. They used pulses of high-energy light to fuse tiny silver wires, resulting in circuits that conduct 10 times more electricity than the state of the art. By increasing conductivity tenfold, the engineers can reduce energy use, extend the life of devices. and increase the device’s performance.
Options for Reducing Friction When Using Silicone ElastomersTBMG-357691/1/2020
Silicone has a long and proven history of use with medical devices and can provide many benefits, from flexibility to cushioning. When working with some medical devices, however, silicones can present challenges due to an inherent surface tack. The surface of cured silicone elastomers is sometimes characterized by a high coefficient of friction (CoF), some degree of tackiness, and a tendency for blocking (sticking to itself by virtue of chemical affinity). These characteristics may need to be addressed in applications that require a molded or extruded silicone component to move or slide with minimal friction. Blocking is particularly evident in slit valves, for example, where the two sides of the silicone part touch each other and “heal,” or close the slit.
Scientists Replace Metal Collimators with Plastic AnalogsTBMG-357741/1/2020
Scientists have developed plastic collimators that can replace their metal analogs used in radiation therapy. The team focused on the exact characteristics of the desired product, its development, and testing. The study will be beneficial for both medicine and everyone who is interested in the effect of radiation on plastic products.
Innovations in Orthopedic Elastomers Enhance Durability and AppearanceTBMG-3562512/1/2019
The history of silicone rubber is synonymous with advancements in medical materials. Silicones, a family of biocompatible elastomers, provide an attractive balance of properties. For example, silicones offer thermal stability over a wide temperature range. They also provide electrical insulation and are resistant to ozone, water, ultraviolet (UV) light, and some chemicals. For medical applications, silicone rubber can also meet requirements from the U.S. Food and Drug Administration (FDA) and the U.S. Pharmacopeia (USP).
Investigation of Silver-Plated Conductor Corrosion (Red Plague)AIR4487B (Current)10/2/2019
This SAE Aerospace Information Report (AIR) shall be limited to information about a specific corrosion mechanism of silver-plated conductors that produces cuprous/cupric oxide deposits (Red Plague). It examines some possible causes and some recommendations to minimize the possibility of its occurrence. It also provides a number of reference documents that describe the corrosion in detail, methods to determine conductor damage, methods to produce the corrosion, and other investigative reports of this phenomena and their conclusions.
AE-8D Wire and Cable Committee
BULKHEAD BRACKET FOR USE WITH MS33667 PLASTIC TIEDOWN STRAPSAS33401B (Historical)10/2/2019
AE-8C2 Terminating Devices and Tooling Committee
Products of Tomorrow: September 2019TBMG-351239/1/2019
Ruggedized BioprinterTBMG-351039/1/2019
nScrypt Inc. Orlando, FL 407-275-4755
Combining Origami and 3D Printing to Make Complex Structures in One StepTBMG-347517/1/2019
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.
Blocked Force Determination on Thin Plate Structures Including Applications2019-01-15256/5/2019
Transfer path analysis is commonly used to determine input forces indirectly utilizing measured responses and transfer functions. Though it is recommended that the source should be detached from the vibrating structure when measuring transfer functions, engineers and technicians frequently have a difficult time in doing so in practice. Recently, a substitute for inverse force determination via transfer path analysis has been suggested. The indirectly determined forces are termed blocked forces and are usable so long as the source and machine are not detached from one another. Blocked forces have the added advantage of being valid even if the machine structure is modified. In this research, a typical automotive engine cover is considered as a receiver structure and is bolted to a plastic source plate excited by an electromagnetic shaker. Blocked forces are determined at different locations, and the correctness of the calculated blocked forces is assessed by comparing the predicted and simulated responses at selected receiver points which were not used for determining the blocked forces.
Chen, Keyu, Herrin, David
Ingestible, Expanding Pill Monitors the Stomach for Up to a MonthTBMG-346246/1/2019
An ingestible pill was developed that, upon reaching the stomach, quickly swells to the size of a soft, squishy ping-pong ball big enough to stay in the stomach for an extended period of time. The inflatable pill is embedded with a sensor that continuously tracks the stomach's temperature for up to 30 days. If the pill needs to be removed from the stomach, a patient can drink a solution of calcium that triggers the pill to quickly shrink to its original size and pass safely out of the body.
Plastic Bearings Redefine the WheelchairTBMG-345806/1/2019
For wheelchair users, the feeling of uneven ground can seem all too familiar. Determined to make ride discomfort a thing of the past, Israel-based SoftWheel has completely reinvented the wheel for a float-like experience.
Method Shrinks Objects to the NanoscaleTBMG-344085/1/2019
Existing techniques for creating nano-structures are limited in what they can accomplish. Etching patterns onto a surface with light can produce 2D nano-structures but doesn’t work for 3D structures. It is possible to make 3D nano-structures by gradually adding layers on top of each other, but this process is slow and challenging. And while methods exist that can directly 3D-print nanoscale objects, they are restricted to specialized materials like polymers and plastics that lack the functional properties necessary for many applications. Also, they can only generate self-supporting structures; for example, the technique can yield a solid pyramid, but not a linked chain or a hollow sphere.
Test Procedure for Determining the Resistance of Safety-Glazing Materials, of which One Surface is Plastic, to Simulated WeatheringJ2081_201904 (Historical)4/11/2019
This SAE Recommended Practice determines whether plastic and glass-plastic safety glazing materials will successfully withstand exposure to simulated weathering conditions.
Glazing Materials Standards Committee
A Model Study for Prediction of Performance of Automotive Interior Coatings: Effect of Cross-Link Density and Film Thickness on Resistance to Solvents and Chemicals05-12-02-00073/27/2019
Automotive interior coatings for flexible and rigid substrates represent an important segment within automotive coating space. These coatings are used to protect plastic substrates from mechanical and chemical damage, in addition to providing colour and design aesthetics. These coatings are expected to resist aggressive chemicals, fluids, and stains while maintaining their long-term physical appearance and mechanical integrity. Designing such coatings, therefore, poses significant challenges to the formulators in effectively balancing these properties. Among many factors affecting coating properties, the cross-link density (XLD) and solubility parameter (δ) of coatings are the most predominant factors. In general, the higher the XLD (i.e., more number of cross-links between the polymeric chain per unit volume of coating network), the lower the free volume between polymer chains and the lower the permeability to the diffusion of solvents and chemicals at a given film thickness. Coatings with optimum XLD are desirable as XLD also affects various mechanical properties like flexibility, hardness, and toughness. Coating formulators often use time-consuming trial-and-error studies to determine formulation with optimum XLD. In this study, a range of 2K-polyurethane automotive clear coats with varying XLDs were formulated and applied on widely used automotive plastic substrates at varying dry-film thicknesses (DFT). The XLD of these coatings were determined by equilibrium swelling technique using various solvents and also by dynamic mechanical analysis (DMA). Additionally, these coatings were tested for chemical, physical, and mechanical properties as per standard test protocols. Analysis of the results provided useful insight into the effect of XLD, DFT, and δ on chemical resistance of the coatings. The outcome of this research can be useful for coating formulators, specifiers, and end-users in optimization of formulations, application processes, and trouble shooting.
Mannari, Vijay, Kommineni, Raviteja
“Metallic Wood” Has the Strength of Titanium and the Density of WaterTBMG-339283/1/2019
Titanium is as strong as steel but about twice as light. These properties depend on the way a metal's atoms are stacked, but random defects that arise in the manufacturing process mean that these materials are only a fraction as strong as they theoretically could be. An architect, working on the scale of individual atoms, could design and build new materials that have even better strength-to-weight ratios.
CAE Based Head Form Impact Simulations for Development of Vehicle Interiors2019-26-02371/9/2019
The interior components of a passenger vehicle are designed to provide comfort and safety to its occupants. In the event of accident, vehicle interiors are primary source of injuries when occupants interact with them. Vehicle interiors consists of Instrument panel (IP), center console, seats and controls in front of seating position etc. Severity of the injuries depends on the energy dissipating characteristics, profiles, projections of different interior components. These are assessed by ECE R21 and IS12553 head form impact tests. To evaluate the Head form impact performance on Interior components, Computer Aided Engineering (CAE) simulations are extensively used during the vehicle development. In order to predict failure of plastic components and snap joints which might lead to expose sharp edges, it is critical to model plastic material and snap joint. Vehicle interiors are certified for head form impact requirements based on physical testing where dashboard samples from productions tools are used. At this stage of development, if any failure occurs then changes in interior design becomes very expensive and time consuming. To avoid this situation, CAE based failure predictions and injury performance evaluations are done during initial design phase of product development when changes are easily implemented without time and cost penalties. This paper describes the development of vehicle interior using CAE based head form impact simulations and predicting the failures like sharp edges exposure, structural integrity or joint failures. For accurate prediction of these failures in CAE based vehicle interior development, plastic material characterization and snap joint failure characterization are done.
Suryawanshi, Yuvraj, Joshi, Kedar, Lambate, Sachin, Jadhav, Vilas
Test Procedure to Measure the Fuel Permeability of Materials by the Cup Weight Loss MethodJ2665_201812 (Current)12/12/2018
This test standard covers the procedure for measuring the permeation of fuel or fuel surrogates through test samples of elastomeric, plastic or composite materials, up to about 3 mm thick. The method involves filling a test cup with the test fluid (fuel or fuel surrogate), sealing test sample over the open end of the cup, and then placing the sealed container into an oven at the desired test temperature and measuring the weight loss over time. Permeation rates are calculated from the rate of weight loss and the exposed area of the test sample. Standard permeation test temperatures are 40 °C and 60 °C. Standard test fluids are Fuel C, Fuel CE10 and Fuel CM15. Other fluids, such as Fuel CMTBE15, and other volatile liquids may be tested according to this procedure as desired (SAE J1681). The method is not applicable for measuring permeation of higher boiling materials that will not completely evaporate from the exterior surface of the sample at the test temperature.
Fuel Systems Standards Committee
New Catalyst for Plastic Production Also Creates HydrogenTBMG-3339012/1/2018
Researchers have developed a new, low-cost catalyst for plastic production that turns a biorefinery product into a starting material for the synthesis of plastics, which could represent a sustainable alternative to widespread PET. At the same time, hydrogen can also be formed during the reaction.
2018 Create the Future Design Contest: Sustainable Technologies Category WinnerTBMG-3332111/1/2018
Bio-Renewable Process Creates “Green” PlasticTBMG-3310410/1/2018
Plastics are often derived from petroleum, contributing to reliance on fossil fuels, and driving harmful greenhouse gas emissions.
Ensuring Injection Molding Quality for Medical DevicesTBMG-3308910/1/2018
Plastics are incredibly versatile. There are thousands of types available to satisfy a myriad of medical applications. Yet, certain plastics present special challenges during the injection molding process that — if not properly addressed — can impact product quality and ultimately preclude medical devices from meeting exacting specifications. The medical device or component cannot — and must not — fail. To do otherwise increases the risk of recall, warranty claims, and litigation. In worst-case scenarios, failure may prove lethal.
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.
Cleaner, Transparent PlasticAMS1535D (Current)9/28/2018
This specification covers a cleaner for plastics in the form of a liquid.
AMS J Aircraft Maintenance Chemicals and Materials Committee
Plastic Bearings Reduce Weight and Improve DurabilityTBMG-290026/1/2018
When engineer Mark Doyle started to put together plans for an exoskeleton to support surgeons in 2012, he wanted to develop a lightweight product that they could wear comfortably for extended periods of time. Doyle and his team at Levitate Technologies (San Diego, CA) had to carefully choose the products that would be included in the device because any additional ounces could have made the device uncomfortable and unwieldy, thus ending development before it entered production.
Radiation Detection with Plastic ScintillatorsTBMG-290266/1/2018
It has been established opinion since the 1950s that organic crystals and liquid scintillators can work for detecting neutrons, but that plastics are not suitable for neutron detection. For years, plastic materials have been used in large, low-cost detectors for portals and high-energy physics facilities, and while they could detect neutrons and gamma rays, they have been incapable of distinguishing one from the other, which is key to identifying nuclear substances such as uranium and plutonium from benign radioactive sources.
Additively Manufactured Composite Ply Placement TemplatesF-0074-2018-128055/14/2018
ABSTRACT Resin pre-impregnated fiber reinforced plastic components are integral to the advancement of rotorcraft due to their highly customizable configuration, outstanding dynamic properties, and light weight. The complexity of their fabrication introduces numerous manufacturing challenges; chief among these is the internal location of individual plies of material. Industry standard solutions are commensurately complicated and require highly specialized equipment and personnel. In order to mitigate this, the Sikorsky-Boeing SB>1 DEFIANT™ Technology Demonstrator team developed the use of additively manufactured (AM) ply locating templates as a simple, low cost alternative. An AM template eliminates many of the issues associated with industry standard ply location techniques and tools. They are elegantly simple to use while being extremely ergonomic; they are extremely cost effective, and require no capital equipment to support them; and they are flexible and quick to implement.
Dunn, Eric
The Unique Dynamic and Structural Solution of a Finite Element Representation of Full Vehicle Based on the Integrated Implicit/Explicit Approach2018-01-12144/3/2018
This article describes a numerical methodology, based on Finite Element approach, able to simulate, with a unique solution, the dynamic and structural response of a full vehicle running on fatigue reference roads. The current durability process is a multidisciplinary one based on a combination of three different phases: load definition, stress definition, and fatigue life prediction. For Long-Time Histories events, the second phase of this process is necessarily based on a Linear assumption using a Static or Dynamic approach. However, in durability events, some situations can lead the material to work in the plastic range, thus putting on the top the strength aspect of the performances and making these phases not independent and sequential, but strongly interdependent. The goal of the methodology reported in this article is to merge, in a unique numerical simulation, the load and stress definition phases. To this purpose, the solution of a full vehicle model of a commercial van, with a complete Finite Element representation of the body structure, running on fatigue roads, is investigated. This work represents an evolution of current load generation methodology and is able to quantify the impact of Nonlinear effects, such as contact and material plastic behavior, on structural response. A comparison of loads and stresses evaluated with the old approach and the new one is performed.
Duni, Efthimio, Signorini, Alberto, Puleo, Vincenzo, SIAS, Alessandro, Piccardi, Simone, Mennillo, Serena
Compatibility Assessment of Fuel System Thermoplastics with Bio-Blendstock Fuel Candidates Using Hansen Solubility Analysis04-11-01-00043/1/2018
The compatibility of key fuel system infrastructure plastics with 39 bio-blendstock fuel candidates was examined using Hansen solubility analysis. Fuel types included multiple alcohols, esters, ethers, ketones, alkenes and one alkane. These compounds were evaluated as neat molecules and as blends with the gasoline surrogate, dodecane, and a mix of dodecane and 10% ethanol (E10D). The plastics included polyphenylene sulfide (PPS), polyethylene terephthalate (PET), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polyoxymethylene (POM), polybutylene terephthalate (PBT), polypropylene (PP), high density polyethylene (HDPE), along with several nylon grades. These materials have been rigorously studied with other fuel types, and their volume change results were found to correspond well with their predicted solubility levels. The compatibility was assessed using Hansen solubility parameters and in many instances peak solubility occurred for blends rather than the neat fuel components. The results showed that good compatibilities can be expected for PPS, PVDF, PET, nylons, acetal, PEI, PVC, HDPE and PBT. PTFE showed potential incompatibilities at low blend concentrations, especially when E10D was used as the base fuel blend. Although, the nylons show good overall compatibility, the results do indicate that mid-range and high alcohol contents may not be suitable for Nylon 6 and Nylon 11 in applications requiring low volume swell. Poor potential compatibility was limited to two plastic types; PETG exposed to mid and high blend levels of the ethers and PP exposed to sabinene and the aromatics. In general, the data showed good compatibility for the majority of the candidate fuels and plastics.
Kass, Michael, West, Brian H.
Laser Direct Structuring for Sensor ManufacturingTBMG-283622/1/2018
Every day the world’s leading medical device companies rely upon laser direct structuring (LDS) to meet their most demanding design and performance requirements. Millions of electronic components with complex geometries are cost-effectively manufactured each year through the use of LDS to create circuit traces on three-dimensional molded interconnect devices (3D-MID).
3D-Printed Objects Connect to WiFi Without ElectronicsTBMG-281651/1/2018
CAD models have been developed that enable objects to be 3D-printed out of commercially available plastics; these objects can wirelessly communicate with other smart devices, including a battery-free slider that controls music volume, a button that automatically places an order with Amazon, or a water sensor that sends an alarm to a smartphone when it detects a leak.
EMR with High Reliability for Retrofit of E4100 Riveting Gantry Machines2017-01-20999/19/2017
Electroimpact has retrofitted two E4100 riveting gantry machines and two more are in process. These machines use the EMR (Electromagnetic Riveter) riveting process for the installation of slug rivets. We have improved the skin side EMR to provide fast and reliable results: reliability improved by eliminating a weekly shutdown of the machine. In paper 2015-01-2515 we showed the slug rivet injector using a Synchronized Parallel Gripper that provides good results over multiple rivet diameters. This injector is mounted to the skin side EMR so that the rivet injection can be done at any position of the shuttle table. The EMR is a challenging application for the fingers due to shock and vibration. In previous designs, fingers would occasionally be thrown out of the slots. To provide reliable results we redesigned the fingers retainer to capture the finger in a slotted plastic block which slides along the outside diameter of the driver bearing. The various size fingers are pinned to the block in such a fashion as to allow rotation and clamping on the rivet. The clamping action is provided by opposing wave springs. The design of the fingers and clamping unit are shown in detail. This improvement in the injector (already reported), combined with an improved finger design, has provided unprecedented reliability and rivet rate.
Zieve, Peter B., Gray, Troy, Wright, Christopher
Silicon Nanoparticles Enable Energy-Collecting WindowsTBMG-272067/1/2017
Technology that embeds silicon nanoparticles into efficient luminescent solar concentrators (LSCs) has been developed. The LSCs are the key element of windows that can efficiently collect solar energy. When light shines through the surface, the useful frequencies of light are trapped inside and concentrated to the edges, where small solar cells can be put in place to capture the energy.
Two-Component Injection Molding as a Noise Countermeasure for Polycarbonate Glazing2017-01-18176/5/2017
Polycarbonate (PC) glazing as a one-for-one glass replacement offers a 50% weight reduction, but exhibits several dB lower sound transmission loss (STL) in the low frequency range where tire and engine noise are dominant. In the high frequency range where wind noise is dominant, PC glazing offers an STL at least comparable to its glass counterpart, and an STL exceeding glass when this frequency range encompasses the glass coincidence frequency. However, a key value proposition of PC glazing is the opportunity for feature integration afforded by the injection molding process generally used for forming such glazing. Two-component (2K) molding fuses a second shot of plastic material behind, and along the perimeter of, the transparent PC first shot. This second shot can incorporate features and implement functions that require additional components attached or peripheral to a glass version. In effect, a portion of the weight reduction entitlement for PC glazing is transferred to the host vehicle, such that the weight reduction of the glazing itself is less than 50%. Moreover, the second shot tends to stiffen the PC glazing relative to the first shot alone. We show experimentally that these two effects contribute to making the low frequency STL of a 2K PC rear window intermediate between the first shot alone and the comparable glass version. Thus, integration operates as a noise countermeasure for glazing weight reduction. Injection molded PC glazing can also be designed for reduced aerodynamic (high frequency) noise, further improving its noise profile versus glass.
Gasworth, Steven M., Nilajkar, Vasudev, Terragni, Matteo
Products of Tomorrow: June 2017TBMG-270296/1/2017
This column presents technologies that have applications in commercial areas, possibly creating the products of tomorrow. To learn more about each technology, see the contact information provided for that innovation.
Development of GFRTP Crush Box with Consideration of Use Environment and Effect of Fiber Orientation2017-01-04983/28/2017
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 disordering of the fiber orientation. Research concerning the performance of thermoplastic FRP crush boxes produced findings that assisted in the design of a thermoplastic FRP crush box that would maintain a stable load characteristic in all use environments. It was found that the temperature-dependency of the compression load characteristic of thermoplastic FRP crush boxes in progressive crushing mode in compression tests is low, and that it is necessary to realize an Euler buckling load higher than the progressive crushing load in order to produce a stable crushing mode. This paper discusses a design method for a thermoplastic FRP crush box based on the above-mentioned conditions in order to realize a stable compression load characteristic, with consideration of the use environment and the effect of fiber orientation.
Yabu, Tomoya, Yasuhara, Shigeto, Kashiwagi, Masakazu
Marking of Plastic PartsJ1344_201703 (Current)3/28/2017
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
Medical Plastics: Meeting Today’s Changing RequirementsTBMG-264272/1/2017
Today’s medical device designers and OEMs are challenged to meet a wide, and sometimes conflicting, range of requirements. These targets stem not only from regulatory restrictions, but are equally likely to arise based on market perceptions, pressures to contain costs, and the changing materials supply landscape.
INSULATION SLEEVING, ELECTRICAL, HEAT SHRINKABLE ETHYLENE-TETRAFLUOROETHYLENE FLUOROPOLYMER, SEMI-RIGIDAS23053/14 (Current)10/17/2016
AE-8D Wire and Cable Committee
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