User login

Navigation

You are here

Abaqus non linear viscoelasticity and variable strain rates.

Hi ,

 

I am using abaqus to model a non linear viscoelastic polymer. I have input my relaxation test data as shear data for viscoelastic properties. I have added hyperelastic properties with uniaxial stress strain data as well.
However I find that the results of output stress strain only match for a constant strain rate.
Would it be possible to have the strain rate dependence reflect on the output.I would like to see the stress strain plot changing with changes in the strain rate.

Would be very helpful if anybody could direct me to any article/ paper elucidating the approach to obtain variable strain rate effects in viscoelastic model.

 

thanks

Shouvik

Comments

Frank Richter's picture

Hello

I declared modulus and viscosity being stress-dependent in my PhD thesis:

Upsetting and Viscoelasticity of Vitreous SiO2: Experiments, Interpretation and Simulation
https://opus4.kobv.de/opus4-tuberlin/frontdoor/index/index/docId/1184

I have posted the analogous procedure for the Kelvin-Voigt model on
http://imechanica.org/node/12702

Good luck

Frank

Hi Frank,

 

Would it be possible to use abaqus inbuilt models as Bergstrom-Boyce model to obtain strain dependent behavior for non linear viscoelastic material. The manual mentions that constants as A,m ,C and E are required .

How can I obtain these from experimental tests.

 

Regards

Shouvik

Subscribe to Comments for "Abaqus non linear viscoelasticity and variable strain rates."

Recent comments

More comments

Syndicate

Subscribe to Syndicate