Blog Articles

September 26 2022
PTFE Featured Image
PTFE (Teflon) is a material with many unique properties. This article examines the accuracy of different material models for PTFE.
September 17 2022
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!
September 10 2022
OpenRadioss
The commercial FE solver Radioss from Altair is now open source! This article shows how to download, compile, and use the OpenRadioss.
September 5 2022
Prony Series
This short note explains how MCalibration defines the Prony series terms, and why it is using a different approach than FE solvers.
September 4 2022
Flow Cessation
This article shows how to fix 2 common problems with viscoplastic material models: E-modulus and large-strain stress.
August 27 2022
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.
August 19 2022
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.
August 16 2022
The article shows how to calculate the strain components from the nodal displacements in a linear finite element calculation.
August 9 2022
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.
August 2 2022
Derivation of the equation of virtual work in discretized form. The presented results are the foundation to the Finite Element method.
July 26 2022
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.
July 19 2022
Tutorial on how to write a full FE solver in 100 lines of Python. This is part one of this tutorial series.
July 12 2022
Anisotropic Hyperelasticity
Did you know that there are 3 different ways to formulate an anisotropic hyperelastic model? This article explains how.
July 5 2022
Quick tutorial on how to use the clipboard to improve the MCalibration workflow.
June 28 2022
The Mooney-Rivlin model be calibrated to monotonic uniaxial tension data, but in most cases it is better to use more experimental data.
June 21 2022
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.
June 14 2022
The Arruda-Boyce Eight-Chain model is a micromechanism-inspired hyperelastic model that works very well. This article explains the theory.
June 7 2022
Did you know that almost all FE simulations underpredict the residual strain / displacements in BENDING. This article explains why.
May 31 2022
Permanent Set Using Viscoelasticity
Did you know that it is possible to predict permanent set using a viscoelastic material model? This article explains how.
May 24 2022
TTS
Time-Temperature Superposition (TSS) is an excellent tool when a material is thermorheologically simple. This article explains how.
May 17 2022
Summary of the new key features in MCalibration 6.6.0.
May 16 2022
Did you know that MCalibration can be used from the command line? This article lists the available command line arguments.
May 10 2022
The LS-DYNA *Mat_Add_Inelalstic is a new and useful model framework that can easily be calibrated using MCalibration.
April 29 2022
Abaqus Temperature Hyperelastic
It is easy to quickly calibrate a temperature-dependent Abaqus Hyperelastic model. This article shows how using MCalibration.
April 28 2022
Ansys Hyperelastic
It is easy to quickly calibrate a temperature-dependent Ansys Hyperelastic model. This article shows how using MCalibration.
April 26 2022
This article shows what experiments to perform on a thermoset in order to calibrate a continuum level material model.
April 19 2022
Testing Thermoplastics
This article explains what experiments to perform on a thermoplastic in order to get the required data for material model calibration.
April 12 2022
Test Plan Rubbers
This article explains what experiments to perform on a rubber material in order to get the required data for material model calibration.
April 4 2022
It is possible to calibrate a two-network visco-plastic material model to experimental data from a single experiment. This article explains how to do it.
March 28 2022
The Tension Test load case in MCalibration is useful for calibrating an Abaqus material model to uniaxial tension data with necking.