I am having problems in writing the umat and uexpan subroutines applicable to the creep model defined in
http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000375
Has anybody written the algorithm?
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I am having problems in writing the umat and uexpan subroutines applicable to the creep model defined in
http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000375
Has anybody written the algorithm?