Abaqus Ultra High Molecular Weight Poly Ethylene (UHMWPe) Material Modelling

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SUMMARY

The discussion focuses on modeling Ultra High Molecular Weight Polyethylene (UHMWPe) in Abaqus for wrist implants. The user, Euan, is encountering errors when defining UHMWPe as a simple elastic material with a Young's modulus of 3.4 x 108 Pa and a Poisson’s ratio of 0.4. Experts suggest that accurate modeling of polymers like UHMWPe requires the use of hyperelastic elements and precise material data to reflect their behavior under various loading conditions.

PREREQUISITES
  • Familiarity with Abaqus software for finite element analysis (FEA)
  • Understanding of material properties, specifically Young's modulus and Poisson’s ratio
  • Knowledge of hyperelastic material modeling techniques
  • Experience with importing orphan meshes and simulation setup
NEXT STEPS
  • Research hyperelastic material models in Abaqus for polymers
  • Learn how to define material properties using experimental data for UHMWPe
  • Explore the use of advanced material definitions in Abaqus for accurate simulations
  • Investigate methods to reduce simulation time while maintaining accuracy
USEFUL FOR

This discussion is beneficial for mechanical engineers, biomedical engineers, and simulation specialists involved in finite element analysis of polymer materials, particularly in the context of medical implants.

euanfoster
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Hey there,

I am currently working on creating models in Abaqus of Wrist implants to see how they respond under different loading conditions. I have used Mimics to export orphan meshes of the wrist bones and also imported the wrist implant itself. My simulations seems to be running fine all apart from one component. One of the components in the wrist implant is UHMWPe which keeps throwing up errors in the results.

I am not a huge expert with Abaqus and have just defined the material as a simple elastic material with a young's modulus of 3.4 x 10^8[Pa] & a Poisson’s ratio of 0.4.

I was wondering if anyone knows how to define the material properties of UHMWPe in a a more complex and realistic manner? Detailed answers would be appreciated as the simulation now takes a day and a bit to complete.

Thanks,

Euan.
 
Engineering news on Phys.org
Modeling some polymers accurately in FEA requires the use of hyperelastic elements and accurate material data in the hyperelastic regime. It will all depend on what kind of material data you have regarding the material in question.
 

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