Blog Articles
Run COMSOL Multiphysics Using an Input File From a Command Prompt
How to run COMSOL Multiphysics using an input file and a command prompt. It is easy using the Java API.
Complete Guide to Using PolyUMod with COMSOL Multiphysics
Guide to using MCalibration and PolyUMod with COMSOL Multiphysics. A complete start-to-finish tutorial is presented.
What Material Model Can Predict Different Stiffnesses in Tension and Compression?
Soft polymer foams, and some other materials, often exhibit different stiffnesses in uniaxial tension and compression. Most material models cannot predict this type of behavior, but there are some excellent choices for this.
How to Force Drucker’s Stability in MCalibration
A material model is considered Drucker’s stable if an increase in strain results in an increase in stress. In some cases it can be important to enforce that a material model is Drucker’s stable. This article shows how you can easily achieve this in MCalibration.
How to Make Ansys find PolyUMod
Instructions for how to make sure Ansys Mechanical finds and uses a PolyUMod material model.
Material Modeling of Polymers
Here is a presentation about (non-linear) material modeling of polymers. I gave the presentation on 2021-06-24.
Plot Stress-Strain from Ansys Material Commands using MCalibration
In this article I will show how you can quickly convert any Ansys material model (in APDL format) into stress-strain predictions using MCalibration. Here are
Plot Stress-Strain from Abaqus Material Commands using MCalibration
It is easy to create stress-strain plots for any Abaqus material model using MCalibration. This article shows how.
MCalibration Material Model Templates
MCalibration supports not only a large selection of pre-defined material models, but you can also define your own material model using a Template.
FE Solvers and Templates in MCalibration
Demonstration of how to use different FE solvers and solver templates in MCalibration.
Extended Tube Model in Ansys Mechanical
The Extended Tube model is one of the most accurate hyperelastic material models available, but it can be difficult to use if you don’t understand how the material parameters influence the predicted stress-strain response. This article will demonstrate that by example.
Setup MCalibration to Use Ansys
Short description of how to setup MCalibration so it can use Ansys as a solver.
Parametric Study of the Mullins Effect Model
The Ogden-Roxburgh Mullins effect model is highly non-linear. In this article I will graphically illustrate how the different parameters influence the predicted stress-strain response.
Calibrate a PolyUMod Material Model with Failure
Tutorial showing how to calibrate a PolyUMod TNV stress-strain and failure model to experimental data.
Calibrate Abaqus Johnson-Cook Model using MCalibration
Tutorial showing how to use MCalibration to calibrate the Abaqus Johnson-Cook model with failure to experimental data.
Introduction to MCalibration and PolyUMod for Altair Radioss
Introduction to how MCalibration and PolyUMod can be used with Altair Radioss. This is a great starting point if you are new to our software.
What is Resulting and what does it have to do with Material Modeling?
Resulting is a term used in the book “Thinking in Bets” to describe how not to make decisions when all you have is limited information. In this article I will describe how this relates to material modeling.
Practical Differences Between Linear and Non-Linear Viscoelasticity
Review of some practical differences between linear and non-linear viscoelasticity.
Strain Amplitude Sweeps in MCalibration
Quick demo of how to setup a strain amplitude sweep in MCalibration.
Quickly Setup Altair Radioss™ to use PolyUMod
Succinct tutorial on how to setup Altair Radioss to use a PolyUMod material model.
Instantaneous Calibration of Abaqus Linear Viscoelasticity using DMA Data
Summary of how you can instantaneously calibrate an Abaqus linear viscolastic material model using DMA data using MCalibration version.
Toe-in Compensate Experimental Data
Detailed description of how the toe-in compensation function in MCalibration works.
How to Predict Permanent Set in Rubbers
Discussion about how to test end model the permanent set of rubbers
Setup an Altair Radioss™ 2021 FE Model using Altair HyperMesh™
Complete step-by-step tutorial on how to use HyperMesh to setup a Radioss FE model with a PolyUMod material model.
Run Altair Radioss™ with PolyUMod using the Command Line
Short tutorial on how to run Radioss with the PolyUMod library from the command line.
5 Common Mistakes when using Hyperelasticity
Here’s a summary of 5 common mistakes when using Hyperelasticity in a FE model. I see these errors frequently, so read this article to make sure you don’t make them too.
Plot Viscoplastic Strain in PolyUMod and MCalibration
Description of how to plot the viscoplastic strain magnitude when using PolyUMod or MCalibration.
Adiabatic Heating in MCalibration
Tutorial on how to include adiabatic heating in your material model calibration using MCalibration.
New Features: Version 6.1.0
Summary of the key new features of version 6.1.0 of MCalibration and PolyUMod.
Best Material Models in 2021 – Thermoplastic Elastomers
Best Abaqus and Ansys material models in 2021 – thermoplastic elastomers
What is Better: Stress Relaxation or Cyclic Loading?
When you work with material models it is always important to think about the type and quality of experimental data that you have. I wrote
Abaqus PRF Model – Network Parameters
Discussion about why the MCalibration implementation of the Abaqus PRF model is different than the Abaqus version.
Hyperfoam Modeling of Soft Foams
The theory behind the common Hyperfoam, Ogden foam, and Hill foam models. Also covers how to calibrate these useful models.
Holzapfel-Gasser-Ogden Model
Detailed discussion about the Holzapfel-Gasser-Ogden (HGO) model. Features, theory, and calibration approaches are covered.
How to Predict Stress Reduction After Yielding
Discussion of how to select and calibrate a material model that can predict stress reduction after yielding.