## Blog Articles

2022-11-27

In this article I show how to quickly calibrate an anisotropic viscoplastic material model to uniaxial tension data.

2022-11-22

In this article I explain how you can graphically visualize the rheological model in order to better understand how these models behave.

2022-11-15

What is the Gough-Joule effect and how to model it in a finite element analysis? This article explains it all.

2022-11-07

This article demonstrates one common mistake that people make when they generate a TTS Master Curve from DMA data.

2022-11-01

Nylon is a commonly used in industrial applications. This article examines which material model is most accurate for Nylon PA66.

2022-10-25

This article shows that the WLF equation is always the same or better than the Arrhenius model.

2022-10-16

Most people assume that the volumetric relaxation is zero in a Prony series. This article demonstrates a different approach that can be better for some materials.

2022-10-11

CPVC is s commonly used industrial material. This study determines the best large-strain material model for CPVC.

2022-10-04

This article demonstrates one problem that can occur if you calibrate a material model without considering the initial Young's modulus

2022-09-26

PTFE (Teflon) is a material with many unique properties. This article examines the accuracy of different material models for PTFE.

2022-09-17

In this article I examine how different material models can predict the response of ABS, and I will show which model is the best!

2022-09-10

The commercial FE solver Radioss from Altair is now open source! This article shows how to download, compile, and use the OpenRadioss.

2022-09-05

This short note explains how MCalibration defines the Prony series terms, and why it is using a different approach than FE solvers.

2022-09-04

This article shows how to fix 2 common problems with viscoplastic material models: E-modulus and large-strain stress.

2022-08-27

Last article is in my series on basic FEA theory. In this article I put everything together to solve for the displacements.

2022-08-19

This article is part 4 in my series on basic FEA theory. The focus is on how to calculate the element stiffness matrix.

2022-08-16

The article shows how to calculate the strain components from the nodal displacements in a linear finite element calculation.

2022-08-09

The focus of this article is on how isoparametric shape functions can be used to simplify the calculation of the principle of virtual work.

2022-08-02

Derivation of the equation of virtual work in discretized form. The presented results are the foundation to the Finite Element method.

2022-07-26

Tutorial on how to write a full FE solver in 200 lines of Python code. This is part 2 in our series. The focus is on using an external file.

2022-07-19

Tutorial on how to write a full FE solver in 100 lines of Python. This is part one of this tutorial series.

2022-07-12

Did you know that there are 3 different ways to formulate an anisotropic hyperelastic model? This article explains how.

2022-07-05

Quick tutorial on how to use the clipboard to improve the MCalibration workflow.

2022-06-28

The Mooney-Rivlin model be calibrated to monotonic uniaxial tension data, but in most cases it is better to use more experimental data.

2022-06-21

Summary of 4 things that are important to know about the Ogden model. It is a very powerful model, but it can be difficult to use correctly.

2022-06-14

The Arruda-Boyce Eight-Chain model is a micromechanism-inspired hyperelastic model that works very well. This article explains the theory.

2022-06-07

Did you know that almost all FE simulations underpredict the residual strain / displacements in BENDING. This article explains why.

2022-05-31

Did you know that it is possible to predict permanent set using a viscoelastic material model? This article explains how.

2022-05-24

Time-Temperature Superposition (TSS) is an excellent tool when a material is thermorheologically simple. This article explains how.

2022-05-17

Summary of the new key features in MCalibration 6.6.0.