Blog Articles

2022-11-27
Anisotropic Viscoplastic Calibration
In this article I show how to quickly calibrate an anisotropic viscoplastic material model to uniaxial tension data.
2022-11-22
Graphical Models
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
Blog Gough-Joule
What is the Gough-Joule effect and how to model it in a finite element analysis? This article explains it all.
2022-11-07
Create a TTS Master Curve
This article demonstrates one common mistake that people make when they generate a TTS Master Curve from DMA data.
2022-11-01
Nylon (PA66) Models
Nylon is a commonly used in industrial applications. This article examines which material model is most accurate for Nylon PA66.
2022-10-25
WLF-Arrhenius
This article shows that the WLF equation is always the same or better than the Arrhenius model.
2022-10-16
Volumetric Relaxation Prony
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 Material Models
CPVC is s commonly used industrial material. This study determines the best large-strain material model for CPVC.
2022-10-04
Don't Forget E Modulus.
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 Featured Image
PTFE (Teflon) is a material with many unique properties. This article examines the accuracy of different material models for PTFE.
2022-09-17
ABS Model Featured Image
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
OpenRadioss
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
Prony Series
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
Flow Cessation
This article shows how to fix 2 common problems with viscoplastic material models: E-modulus and large-strain stress.
2022-08-27
FEA Solve For Displacements
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
Linear FEA Km
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
Isoparametric Shape Functions
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
Python FE 200
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
Anisotropic Hyperelasticity
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
Ogden Model Image
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
Permanent Set Using Viscoelasticity
Did you know that it is possible to predict permanent set using a viscoelastic material model? This article explains how.
2022-05-24
TTS
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.