Impact

Case study

Cell Phone Drop Test
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.
Cohesive Zone Model (CZM) Calibration
Cohesive zone modeling is a powerful tool for predicting delamination in adhesively bonded structures. Veryst engineers use their expertise in experimental and computational fracture mechanics to calibrate cohesive zone models for accurate prediction of adhesive failure.
Golf Ball Impact Simulation
Accurate simulation of golf ball behavior during impact with a club is challenging due to the nonlinear impact event, the complexity of the polymeric ball material at the high strain rates experienced during impact, and the scarcity of material properties at these high strain rates. Veryst Engineering developed an accurate model that accounts for these complexities.
High Strain Rate Testing of Fiber-Reinforced Thermoplastics
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.
High Strain Rate Testing of Polymers
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 Veryst Engineering’s MCalibration® software.
Impact Fracture Toughness of Adhesive Joints
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.
Polymer Material Models in Different FE Packages
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.

Service

Impact Simulation & Testing
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.
Polymer Analysis
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.
Simulation & Analysis

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, and system

Testing

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

News item

Publication: Veryst develops advanced constitutive model for UHMWPE
Ultra-high molecular weight polyethylene (UHMWPE) is used extensively in biomedical devices due to its mechanical properties, including high impact and wear resistance. Veryst developed an advanced thermomechanical constitutive model for UHWMPE where the microstructure of the material is represented using three structural domains that capture the experimentally-observed, nonlinear, time- and temperature-dependent response at small and large strains.

Event

Presentation on impact testing and modeling of polymer foams
Dr. Sean Teller spoke about "Impact Testing and Modeling of Energy Absorbing Foams for Finite Element Simulation" at the Foam Expo 2017.  His presentation focused on high strain-rate testing and modeling of foams for use in finite element simulations. 
Two presentations at ANTEC 2018
Dr. Mark Oliver participated in the “Additive Manufacturing: Design, Test, and 3D Print for Production” session at ANTEC 2018, and Dr. Sean Teller participated in the “Engineering Properties and Structure: Innovations in Polyolefins and Plastics” session.
Veryst presents at three conferences
Dr. Stuart Brown spoke about “Modeling and Design of Reinforced Elastomeric Products for Oil and Gas Applications” and “High Strain Rate Testing of Polymers for Impact Simulations,” while Eric Schmitt spoke about “Calibration and Experimental Validation of Advanced Constitutive Models of Polymeric Materials at High Strain Rates.”

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