Testing

Seminar

Advanced Finite Element Modeling of Solid Polymers (Part 2)

This class is an extension of the original Part 1 class, and covers in more depth the theory of different material models and includes hands-on exercises designed to teach how to use the different models to solve real problems.

Failure Predictions of Rubbers and Thermoplastics Using FEA

Predicting failure of different polymers can be difficult due to material nonlinearities and sensitivity to the load environment. In this class we will discuss different techniques that can be used to predict both brittle and ductile failure, including fatigue, of different types of polymers.

Failure Predictions of Rubbers and Thermoplastics Using FEA 2019

Predicting failure of different polymers can be difficult due to material nonlinearities and sensitivity to the load environment. In this class we will discuss different techniques that can be used to predict both brittle and ductile failure, including fatigue, of different types of polymers.

Finite Element Modeling of Solid Polymers (Part 1)

This two-day, web-based course covers a review of polymer mechanics theory, techniques and tools for experimentally characterizing polymers, and hands-on training on how to perform accurate finite element simulations of polymer components. This is the original training class that we have been gi

High Strain Rate Testing and Modeling of Solid Polymers
Foams, elastomers, and other polymers are often exposed to high strain rates and impact events. Due to the materials' strain-rate dependence, it is important to have accurate experimental data in order to select and calibrate a suitable material model. This class will demonstrate the use of Split Hopkinson bar tests and traditional uniaxial tests, and provide hands-on exercises for how to use the experimental data to calibrate suitable material models.
High Strain Rate Testing and Modeling of Solid Polymers 2019
Foams, elastomers, and other polymers are often exposed to high strain rates and impact events. Due to the materials' strain-rate dependence, it is important to have accurate experimental data in order to select and calibrate a suitable material model. This class will demonstrate the use of Split Hopkinson bar tests and traditional uniaxial tests, and provide hands-on exercises for how to use the experimental data to calibrate suitable material models.

Case study

Additively Manufactured Lattices
Additive manufacturing (AM) enables the production of complex lattice structures that cannot feasibly or economically be manufactured any other way. However, there are complicating factors that engineers are likely to confront when designing fine AM lattice structures: geometric inaccuracy and anisotropic material properties.
Anisotropy of 3D-Printed Polymers
Many additively manufactured polymers exhibit anisotropic mechanical properties which must be accounted for by engineers designing with these materials. This case study illustrates the importance of testing additively manufactured polymers at many orientations to identify the range of isotropic behavior as well as the optimal build orientation.
Broken Rail Train Derailment
A train derails with an ensuing fire and evacuation of a neighborhood. What was the root cause of the derailment?
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.
Cranial Perforators
Medical devices, such as the cranial perforator here, show imperfections that are rejected by physicians. Veryst investigates the source of these imperfections and recommends steps to remove them.
Design of Reinforced Hoses
A high-strength reinforced hose failed in service under normal operating conditions well before its intended design life. Inspections of the subject hose revealed that failure was mainly due to delamination.
FEA of Absorbable PLLA Bone Screw
The nonlinear deformation and material relaxation associated with modeling the polymer screws for anterior cruciate ligament (ACL) reconstruction makes predicting key quantities such as stresses and holding forces challenging. Veryst, with its unique ability to test and model PLLA materials, was able to develop material and finite element models that predict the important short-term pull-out forces as well as the evolution of stresses over time.
FTIR microscopy analysis of thermoplastic solvent bonding
Solvent bonding, although an effective way to join thermoplastics, can pose process challenges that reduce bond strength. Veryst uses FTIR microscopy to characterize the interface structure of solvent bonds, obtaining a “chemical image” of the solvent-bonded interface. The result is a full understanding of the bond and ways to improve its strength and reliability.
Guidewire Entanglement
Guidewires and stents can become entangled during deployment. Veryst assists in determining whether product design plays any role in these events.

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