Blog Articles

16 August 2022
The article shows how to calculate the strain components from the nodal displacements in a linear finite element calculation.
9 August 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.
2 August 2022
Derivation of the equation of virtual work in discretized form. The presented results are the foundation to the Finite Element method.
26 July 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.
19 July 2022
Tutorial on how to write a full FE solver in 100 lines of Python. This is part one of this tutorial series.
12 July 2022
Anisotropic Hyperelasticity
Did you know that there are 3 different ways to formulate an anisotropic hyperelastic model? This article explains how.
5 July 2022
Quick tutorial on how to use the clipboard to improve the MCalibration workflow.
28 June 2022
The Mooney-Rivlin model be calibrated to monotonic uniaxial tension data, but in most cases it is better to use more experimental data.
21 June 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.
14 June 2022
The Arruda-Boyce Eight-Chain model is a micromechanism-inspired hyperelastic model that works very well. This article explains the theory.
7 June 2022
Did you know that almost all FE simulations underpredict the residual strain / displacements in BENDING. This article explains why.
31 May 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.
24 May 2022
TTS
Time-Temperature Superposition (TSS) is an excellent tool when a material is thermorheologically simple. This article explains how.
17 May 2022
Summary of the new key features in MCalibration 6.6.0.
16 May 2022
Did you know that MCalibration can be used from the command line? This article lists the available command line arguments.
10 May 2022
The LS-DYNA *Mat_Add_Inelalstic is a new and useful model framework that can easily be calibrated using MCalibration.
29 April 2022
Abaqus Temperature Hyperelastic
It is easy to quickly calibrate a temperature-dependent Abaqus Hyperelastic model. This article shows how using MCalibration.
28 April 2022
Ansys Hyperelastic
It is easy to quickly calibrate a temperature-dependent Ansys Hyperelastic model. This article shows how using MCalibration.
26 April 2022
This article shows what experiments to perform on a thermoset in order to calibrate a continuum level material model.
19 April 2022
Testing Thermoplastics
This article explains what experiments to perform on a thermoplastic in order to get the required data for material model calibration.
12 April 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.
4 April 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.
28 March 2022
The Tension Test load case in MCalibration is useful for calibrating an Abaqus material model to uniaxial tension data with necking.
22 March 2022
PolymerFEM Webinar
Information about our upcoming webinar on how to quickly use experimental data to calibrate a non-linear viscoplastic material model.
21 March 2022
Review of different creep models that are available in Ansys Mechanical. In the article I will recommend which to use and which to avoid.
11 March 2022
Tutorial on Abaqus creep laws, which 2 you should not use, and which are the best. I also discuss how creep models work for polymers.
8 March 2022
Article discussing how isotropic hardening plasticity works, when you should use it, and issues that can occur if you use it incorrectly.
28 February 2022
Demonstration of how you can use the PolyUMod Material Database model for LLDPE. This is an excellent model for generic LLDPE.
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.
14 February 2022
BAM Model
One way to quickly improve the accuracy of the Arruda-Boyce model is to add one more strain energy funcion.