What is the Deal with Drucker Stability?
25 April, 2023
The Drucker Stability condition is well know, but not trivial to understand. This article explains what this condition means, and how to use it in your own work.
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Category: General Topics
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Can I Calibrate a Viscoplastic Material Model to a Single Tension Curve?
28 February, 2023
Sometimes it is possible to calibrate a viscoplastic material model to a single monotonic tension curve. This article has the details.
Is ChatGPT a Useful Tool for Polymer Mechanics?
30 December, 2022
In this article I will explore how useful the new AI tool ChatGPT from OpenAI is for topics related to polymer mechanics.
Should Material Model Parameters be Unique?
23 December, 2022
If you repeat a material model calibration multiple times, should you expect the optimal material parameters to be unique?
Graphical Explanation of Modern Polymer Material Models
22 November, 2022
In this article I explain how you can graphically visualize the rheological model in order to better understand how these models behave.
Don’t Forget the Young’s Modulus
4 October, 2022
This article demonstrates one problem that can occur if you calibrate a material model without considering the initial Young’s modulus
Download, Compile, and Use OpenRadioss
10 September, 2022
The commercial FE solver Radioss from Altair is now open source! This article shows how to download, compile, and use the OpenRadioss.
Introduction to Anisotropic Hyperelasticity
12 July, 2022
Did you know that there are 3 different ways to formulate an anisotropic hyperelastic model? This article explains how.
Why FEA Underpredicts Residual Strain in Bending
7 June, 2022
Did you know that almost all FE simulations underpredict the residual strain / displacements in BENDING. This article explains why.
Permanent Set Using Viscoelasticity
31 May, 2022
Did you know that it is possible to predict permanent set using a viscoelastic material model? This article explains how.
How to Calibrate an Abaqus Material Model to Tension Data with Necking
28 March, 2022
The Tension Test load case in MCalibration is useful for calibrating an Abaqus material model to uniaxial tension data with necking.
Residual Strain Prediction
22 February, 2022
Most tests are in displacement control, but residual strain is measured in load control. This article explains how to use this mixed data.