Numerical simulation of non-standard tensile tests of thin metal foils

Abstract

Abstract. The evolution of the fracture processes occurring in thin metal foils can be evidenced by tensile tests performed on samples of non-standard dimensions. The load versus displacement record of these experiments does not return directly the local stress-strain relationship and the fracture characteristics of the investigated material. In fact, the overall response of thin foils is sensitive to local imperfections, size and geometric effects. Simulation models of the performed tests can support the interpretation of the experimental results, provided that the most significant physical phenomena are captured. The present contribution focuses on the role of modelling details on the numerical output that can be obtained in this context.

Numerical Simulation of Buckling and Post-Buckling Behavior of a Central Notched Thin Aluminum Foil with Nonlinearity in Consideration

“…An initially notched sheet under tensile load reveals some compression zones around the crack area due to compression stresses. The existence of these compression stresses in sheets with small thickness-to-width/length ratio leads to local buckling around the crack and the formation of wrinkles on the surface of the sheets [1][2][3][4][5][6][7]. Due to the wide application of thin sheets in different fields, from civil engineering [8][9][10] to mechanical [11][12][13] and aerospace engineering [14,15], numerous researchers have studied the buckling behavior of thin sheets with initial cracks.…”