Blog Articles

2022-01-03
Blatz-Ko Model
The Blatz-Ko model can be used for both foams and rubber-like materials. This article explains the theory.
2021-12-27
Best PEEK Material Model in 2022
This article examines which material model is best for PEEK. Some of the basic plasticity models are surprisingly bad.
2021-12-22
Anisotropic Hill Strain
Anisotropic materials often need an effective strain measure. The Hill strain is useful in those cases.
2021-12-20
Hill Stress
Definition of the Hill Stress and how to use it in material models.
2021-11-22
How Important is the Bulk Modulus in FEA?
Investigation of how important the bulk modulus is in a FE simulation. Using MCalibration and Abaqus, I show that most of the time the bulk modulus has virtually no influence on the FE results.
2021-09-17
Hytrel Material Modeling
Hytrel is a thermoplastic polyester elastomer. In this post I examine what material models can be used to predict the response of this class of materials.
2021-08-09
Stress Triaxiality and Thermoplastics
The applied stress triaxiality influences the mechanical response of thermoplastic materials in non-intuitive ways. In this article, I will explain how.