Residual Strain Prediction
2022-02-22
Most tests are in displacement control, but residual strain is measured in load control. This article explains how to use this mixed data.
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Category: MCalibration
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Make Your Own Hyperelastic Model
2022-02-14
One way to quickly improve the accuracy of the Arruda-Boyce model is to add one more strain energy funcion.
Gent Hyperelasticity
2022-02-08
Gent hyperelasticity theory and parameter calibration. The Gent model is available in Ansys Mechanical and COMSOL Multiphysics.
3 Reasons the Poisson’s Ratio is not Useful
2022-02-01
This article presents 3 reasons the Poisson’s ratio is not useful, and also explains how you can fix the problems.
Material Model from Tension Force History
2022-01-25
Part 3 in our series on how to calibrate a material model from tension force data. This article focuses on using Abaqus for the calculations.
FE Material Model from Tension with Necking
2022-01-17
Part 2: Calibrating a material model from tension with necking experimental data is surprisingly difficult. This article explains one approach to do it.
Cold Drawing FE Simulations of Polycarbonate
2022-01-11
Part 1: Tutorial on how to predict the cold drawing or necking response of thermoplastics (such as polycarbonate).
Stiffness Non-Linearity of Viscoplastic Material Models
2022-01-04
Tutorial on how to make the PolyUMod TN and TNV models better capture the stiffness non-linearity before yielding.
Blatz-Ko Model
2022-01-03
The Blatz-Ko model can be used for both foams and rubber-like materials. This article explains the theory.
Best PEEK Material Model in 2022
2021-12-27
This article examines which material model is best for PEEK. Some of the basic plasticity models are surprisingly bad.
How to Use Units in MCalibration
2021-12-13
This video shows how you can work with, and change to different units in MCalibration.
How Important is the Bulk Modulus in FEA?
2021-11-22
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.