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).
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Category: Theory
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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.
Anisotropic Hill Strain
2021-12-22
Anisotropic materials often need an effective strain measure. The Hill strain is useful in those cases.
Hill Stress
2021-12-20
Definition of the Hill Stress and how to use it in material models.
Is Pure Shear the Same as Planar Tension?
2021-12-03
This article examines the difference between simple shear, pure shear, and planar tension.
Is Uniaxial Compression the Same as Biaxial Tension?
2021-11-28
It would be very handy if uniaxial compression was the same as biaxial tension. But is it? This article has the answer.
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.
Theory of the Yield Stress Dependence on Strain-Rate
2021-10-11
Theory of how the constitutive elements influence the predicted yield stress dependence on strain rate
Best Material Model for Polycarbonate at High and Low Strain Rates
2021-10-11
Review of how different material models can be used to predict the non-linear response of PC. Also covers how the yield stress depends on the strain rate.
The Math Behind Stress Relaxation and Creep of Polymers
2021-10-02
Quick discussion about the math behind stress relaxation and creep in polymers.