Technical note Open Access

Asymmetric Elastoplastic Behavior and Failure of GEM Foils

G. Raffone


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    <subfield code="a">thin films, polymers, cohesive zone material, adhesion, grain boundaries.</subfield>
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    <subfield code="a">&lt;p&gt;The nonlinear isotropic power hardening and the cohesive zone material (CZM) [1] criteria are applied in ANSYS [2] 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&amp;ndash;6]. However the present work provides a different explanation of that behavior (already suggested in an earlier note of the author [7]) and it should be considered as a critical review concerning the conclusions of the aforementioned works.&lt;/p&gt;</subfield>
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