Technical note Open Access
The nonlinear isotropic power hardening and the cohesive zone material (CZM)  criteria are applied in ANSYS  finite element simulations to analyze very large deformations of the GEM foils up to the failure in uniaxial tensile tests. Some data available in literature concerning both the PI/Cu and the grain boundary interfaces are utilized. The computed progressive plasticization of the perforated thin multilayer agree very well with the experimental results published by some researchers [3–6]. However the present work provides a different explanation of that behavior (already suggested in an earlier note of the author ) and it should be considered as a critical review concerning the conclusions of the aforementioned works.