Datapoint Newsletter: Fall '11, Volume 17.3
Expansion: New Lab Space, New TestPaks. DIGIMAT MX Reverse Engineering Update.
Read full postA Robust Methodology to Calibrate Crash Material Models for Polymers
High strain rate material modelling of polymers for use in crash and drop testing has been plagued by a number of problems. These include poor quality and noisy data, material models unsuited to polymer behaviour and unclear material model calibration guidelines. The modelling of polymers is thus a risky proposition with a highly variable success rate. In previous work, we tackled each of the above problems individually. In this paper, we summarize and then proceed to present a material modelling strategy that can be applied for a wide variety of polymers.
Read full postDatapoint Newsletter: Summer '08, Volume 14.3
New 100kN Instron. New TestPaks Alliance Partner. Expanded Viso-Elastic Testing Capability. New at TestPaks.com.
Read full postA Novel Technique to Measure Tensile Properties of Plastics at High Strain Rates
High strain-rate properties have many applications in the simulation of automotive crash and product drop testing. These properties are difficult to measure. These difficulties result from inaccuracies in extensometry at high strain rates due to extensometer slippage and background noise due to the sudden increase in stress at the start of the test. To eliminate these inaccuracies we use an inferential technique that correlates strain to extension at low strain rates and show that this can be extended to measure strain at higher strain rates
Read full postMechanical Properties of Polymers and Composites, 2nd Edition: Book Review
This book presents a valuable resource for engineers and designers seeking to apply structural analysis and other advanced methods to the design of plastic parts. The reader learns what to expect for the mechanical properties of polymers and develops a grasp of how plastics respond to various applied stress conditions. The book introduces mechanical tests and polymer transitions, moving onward into chapters on elastic behavior, creep and stress relaxation, dynamic mechanical properties, stress- strain behavior and strength, It also covers abrasion, fatigue, friction and stress cracking. Additionally, the effects of fillers and fibers on these properties are considered.
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