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constitutive model of polymers

Submitted by yiqinuli on

I have been studying constitutive models of polymers for four years, and I have written vumat codes of several constitutive models, such as BPA, Arruda-Boyce, Mulliken-Boyce, Johnson-Cook, DSGZ and G’Sell-Jonas, but I don't understand the theory of anand constitutive model. If anybody share the corresponding the vumat codes of anand constitutive model, I will appreciate his or her help very much, and I am also willing to help him or her by sharing my codes with  him or her. My mailbox is wanghaitao [at] hust.edu.cn. Looking forward to your letter. 

By the way, the corresponding papers of anand are as follows:

(1) A theory of amorphous solids undergoing large deformations, with application to polymeric glasses

(2) On modeling the micro-indentation response of an amorphous polymer

(3) A thermo-mechanically coupled theory for large deformations of amorphous polymers. Part I: Formulation