The application discloses a method for implanting a
large deformation plastic element based on FDEM in a non-rotating reference
system, which comprises the following steps: obtaining a deformation rate in a rotating configuration and a
rotation matrix based on the node coordinates of a
triangular element; obtaining the deformation rate in a non-rotating configuration based on the deformation rate in the rotating configuration and the
rotation matrix; determining an elastic trial stress, determining a material state in combination with a yield function, obtaining a true stress, and performing rotation mapping of an original
reference configuration to obtain a true Cauchy stress; according to FDEM calculation, calculating
contact force and force caused by cohesive force elements, and then uniformly converting the
contact force and the force into node force; updating the node velocity and the position in the
current time step through Newton's second law; and entering the next
time step. The application introduces the calculation of a stress
tensor in a non-rotating reference
system, rotates the stress
tensor, maps the stress
tensor to the original reference
system, and realizes the accurate
simulation of plastic behavior in the wired-discrete element in combination with a yield function and a plastic flow rule.