Blog Articles

Anisotropic Viscoplastic Calibration
In this article I show how to quickly calibrate an anisotropic viscoplastic material model to uniaxial tension data.
Graphical Models
In this article I explain how you can graphically visualize the rheological model in order to better understand how these models behave.
Blog Gough-Joule
What is the Gough-Joule effect and how to model it in a finite element analysis? This article explains it all.
Create a TTS Master Curve
This article demonstrates one common mistake that people make when they generate a TTS Master Curve from DMA data.
Nylon (PA66) Models
Nylon is a commonly used in industrial applications. This article examines which material model is most accurate for Nylon PA66.
This article shows that the WLF equation is always the same or better than the Arrhenius model.
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.
CPVC Material Models
CPVC is s commonly used industrial material. This study determines the best large-strain material model for CPVC.
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
PTFE Featured Image
PTFE (Teflon) is a material with many unique properties. This article examines the accuracy of different material models for PTFE.
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!
The commercial FE solver Radioss from Altair is now open source! This article shows how to download, compile, and use the OpenRadioss.
Prony Series
This short note explains how MCalibration defines the Prony series terms, and why it is using a different approach than FE solvers.
Flow Cessation
This article shows how to fix 2 common problems with viscoplastic material models: E-modulus and large-strain stress.
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.
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.
The article shows how to calculate the strain components from the nodal displacements in a linear finite element calculation.
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.
Derivation of the equation of virtual work in discretized form. The presented results are the foundation to the Finite Element method.
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.
Tutorial on how to write a full FE solver in 100 lines of Python. This is part one of this tutorial series.
Anisotropic Hyperelasticity
Did you know that there are 3 different ways to formulate an anisotropic hyperelastic model? This article explains how.
Quick tutorial on how to use the clipboard to improve the MCalibration workflow.
The Mooney-Rivlin model be calibrated to monotonic uniaxial tension data, but in most cases it is better to use more experimental data.
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.
The Arruda-Boyce Eight-Chain model is a micromechanism-inspired hyperelastic model that works very well. This article explains the theory.
Did you know that almost all FE simulations underpredict the residual strain / displacements in BENDING. This article explains why.
Permanent Set Using Viscoelasticity
Did you know that it is possible to predict permanent set using a viscoelastic material model? This article explains how.
Time-Temperature Superposition (TSS) is an excellent tool when a material is thermorheologically simple. This article explains how.
Summary of the new key features in MCalibration 6.6.0.