A Johnson-Cook elasto-plastic material law is defined for shell elements. Input user
data includes density, Young’s modulus, Poisson ratio, yield stress, hardening
parameters, hardening modulus, maximum stress, and maximum strain.
The Johnson Cook model:(1)
σ=A+BεNpσ=A+BεNp
Maximum stress and plastic strain are taken into account. Shell thickness is
variable.
Two methods are available to compute plastically admissible stresses:
Projection by return radial
Iterative projection with three Newton iterations
Figure 1. Shell Elements Model
Example Demo Files
Before you begin, copy the file(s) used in this problem
to your working directory.
