Polymer foams may exhibit extreme strain rate-dependence due to their structure. The low stiffness means testing the materials at high strain rates is particularly difficult. Veryst has developed multiple test methods to test and model these materials.
Obtaining accurate results from finite element analyses of polymers is not easy. Polymers are often highly temperature- and rate-dependent, exhibiting significant stress-relaxation, creep, and recovery. In this forming case study, Veryst examines the steps required to produce an accurate constitutive model of an example polymer, polyether ether ketone (PEEK), and shows the consequences of oversimplification.
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.
Materials that have been deformed past their yield point and into the plastic strain region often display permanent deformation upon removal of load. How much of this deformation is truly permanent? Veryst has developed a method to measure the residual strain of materials following unloading as a function of time.
Tires experience large, complex deformation during use, and the highly filled rubbers are difficult to model. Veryst designed and calibrated a custom material model to capture the mechanical behavior of the tire to improve the design.
Veryst Engineering helps clients realize high-performance additively manufactured parts. Our strong foundational knowledge in materials science and mechanics coupled with practical expertise in experimental methods and engineering software make us uniquely qualified to solve complex additive manufacturing challenges.
Veryst assists clients with the selection of adhesive materials, development of bonding processes, and mechanical analysis of interfaces. We employ chemical characterization, mechanical testing, and advanced computational methods to design robust adhesively bonded structures and to understand delamination failures.
Veryst works with clients to develop high-performance, reliable, and manufacturable medical devices. We apply advanced characterization technologies, engineering analysis, and sophisticated simulation software to provide cost-effective solutions to time-critical engineering problems.
Veryst provides expert services for product design, manufacturing processes, and failure analysis of polymeric components. Our expertise includes experimental characterization, computer modeling, and failure analysis. Our work is based on advanced characterization and physically-based computer models to solve industrial problems involving polymer systems.
Veryst provides expertise in many aspects of simulation and analysis for use in product design, manufacturing processes, and failure analysis. This includes modeling and analysis involving polymer materials, multiphysics modeling, finite element analysis, computational fluid dynamics, computatio
Veryst assists clients in addressing problems involving transport of species or chemical substances. Our experience includes transdermal drug delivery and permeability of polymer systems. We employ advanced computational methods which allow us to model the complex coupled interactions between solute concentrations and carrier material properties.
Veryst offers leading expertise in advanced finite element modeling, particularly for complex, nonlinear problems. We can address problems that other finite element analysis consultants either cannot or are not sufficiently experienced to do well.
Veryst’s mechanical testing capabilities have been developed over the past decade and are motivated by the need for high quality data to characterize complex polymer behavior. We tailor our test programs based on our deep understanding of polymer and material mechanics and the challenges complex
"Stress-free Simulation: The Art of Accurate Polymer Modelling" is the title of an article by Veryst's Eric Schmitt and Jorgen Bergstrom. The article appears in the October 2016 issue of Benchmark magazine, published by NAFEMS.