Abstract
Cylindrical deep-drawing tests were carried out for roll-bonded stainless-steel/aluminum laminates. The limiting drawing ratio (LDR) was found to be higher when a punch contact metal was strong material (stainless-steel) compared to the opposite case of reversed blank-set condition. In order to find the reason for the phenomenon, the effect of the blank-set condition on the maximum punch load for a given diameter of a blank and the fracture load at LDR was investigated. It was found analytically and experimentally that the fracture load of the laminate subjected to stretch bending at a punch corner was higher when a punch contact metal was strong material compared to the opposite case. From this result, it is clear that the difference in LDR between both the cases is mainly due to the difference in the fracture load of the laminate at a punch corner.
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