Design engineers often use polymers in impact protection applications, and these designs experience high strain rates during impact. Polymers are viscoplastic by nature, so the material response is highly dependent on the strain rate. Collecting data on your polymer (elastomer, thermo
Design engineers often use polymers in impact protection applications, and these designs experience high strain rates during impact. Polymers are viscoplastic by nature, so the material response is highly dependent on the strain rate. Collecting data on your polymer (elastomer, thermo
From smartphones and cameras to wireless headphones and battery packs, portable electronics proliferate. Consumers expect excellent resilience to device drops, increasing pressure on manufacturers to test thoroughly and optimize their designs. Veryst utilized its unique expertise in accurately modeling complex materials, conducting high strain rate testing, and simulating impact events to simulate the drop impact of an external battery pack.
Impact modeling of polymers is important given their use in consumer products as both structures and impact protection. Accurate FE models of impact events require high rate testing, advanced modeling, and a thorough understanding of polymer failure.
Biodegradable polymers are becoming increasingly attractive for consumer product applications such as electronic devices and disposable packaging. Modeling these materials during impact is challenging due to the complexity of the physical event and the scarcity of appropriate material models for biodegradable polymers.
Foam materials often exhibit high strain rate sensitivity, with large increases in stiffness as materials are loaded at higher rates. Veryst performed high-rate compression tests of a foam material, reaching impact strain rates of over 1500/s.
Polymers exhibit significant temperature-dependent mechanical response. Veryst tested a PEEK material at multiple temperatures and calibrated the PolyUMod® Three Network (TN) material model for finite element simulation.
Understanding composite materials’ impact response as a function of fiber direction is important for a wide range of uses, from automotive applications for crashworthiness to consumer product uses for drop and impact resistance. Veryst evaluated the high strain rate response of both glass fiber and carbon fiber reinforced PEEK (polyether ether ketone) using the Split Hopkinson Pressure Bar test method.
This case study demonstrates the testing and calibration of a polycarbonate material at a high strain rate of 1000 sec-1. The testing was done with the Split Hopkinson Pressure Bar (SHPB) system and the calibration is performed with the MCalibration® software, originally developed by Veryst Engineering.
Veryst developed a new test method for measuring fracture toughness under impact loading that does not require measurement of load or crack length. We have used this method to help clients in the automotive and electronics industry understand how adhesives fail under impact conditions.
All commercial FE packages provide material models for polymers, but Veryst Engineering’s PolyUMod® material library has advanced material models at the leading edge of polymer mechanics. We demonstrate the accuracy of a PolyUMod material model with native material models from Abaqus, ANSYS, and LS-DYNA.
Veryst offers expertise in simulation and testing of impact events with specialties including transient simulations, high strain-rate material characterization, modeling of failure mechanisms, and data processing and analysis. Veryst has served a wide range of industries in this area, such as consumer electronics, sports equipment, consumer appliances, and petrochemical engineering.
Dr. Sean Teller's article appears in RubberWorld magazine’s January, 2019 edition. Dr. Teller explains the different test methods available to test elastomers and TPEs, advantages and disadvantages, and more.
Veryst’s new "In the Test Lab" webinar series focuses on polymer mechanics and experimental testing and features various experimental methods, test systems, and more. The first three webinars are now open for registration.