Correct/Best constitutive model for indentation of PET?

Ataollah Mesgarnejad @Ataollah-Mesgarnejad

28 May 2013 1 3K Report

I need to model micro indentation (radius of spherical inndenter = 20 micro meter) of PET (polyethylene terephthalate) but I'm not sure which viscoelastic (or even plastic) constitutive model is best suited for the task and preferably the easiest to implement in an FEM code.

Meiyu Zhai

you could try to use the viscoelastic model which solved the moving boundary problem. Please see the attached paper for detailed information. I think you could first try to use single indentation curve and less parameters.

Article Viscoelastic Modeling of Nanoindentation Experiments: A Mult...

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