nonlinear viscoelastic

[akeel]

Hi
is there any one have any information on nonlinear viscoelastic material models polymer, I made FEM progam for nonlinear viscoelastic material models (shapery model) and I need more information about the experimantal.

thanks

[Jorgen]

Hello akeel,

Have you already implemented the Shapery model? And are you now looking for experimental data? If so, then you can download experimental data for some thermoplastics and elastomers on the Experimental Data Page (http://www.polymerfem.com/modules.php?name=Materials_Models).

- Jorgen

[Peeyush]

Hi ,

I am very new to UMAT and my ultimate goal is to actually implement schapery's model of non -linear viscoelasticity in UMAT . I have experimental data from my experiments and want to model the results. Of course as any new user, a lot of problems. If somebody has experience with coding in

Intergral equations in UMAT so that scheme is stable and converges, please help. Infact guidelines would work too. and if you are too generous , a model program for schapery's model would be greatly appreacited.

Peeyush