UMAT and VUMAT about elasticity, viscoplasticity, composite and PDF book about computational plasticity, I am PhD student, I would like to share with you our information and coding

现在用到VUMAT，发现网上这种小例子很少，关于VUMAT的资料也不多。摸索了一天，做个VUMAT的小例子供大家分享。(Now use VUMAT, found that there are few small examples of online, VUMAT on the information is not much. Groping for a day, to be a small example of VUMAT for everyone to share.)

lecture of Writing a UMAT or VUMAT

利用Fortran对Abaqus进行二次开发，包括UMAT、VUMAT和UEL的编写方法和简单案例。(Use Fortran for secondary development of Abaqus)