c SUBROUTINE UEL c : Main function for the computational implementation of c a two-dimensional linear intrinsic cohesive element c SUBROUTINE k_Cohesive_PPR c : Function to compute the traction-separation relationship c of the PPR potential-based mod

可以批量嵌入cohesiveelements，0厚度单元，abaqus使用(Embeddable cohesiveelements in batches, 0 thickness unit for abaqus use)