Abstract
The deep drawing process is one of the important sheet-metal forming processes. Using this operation, many parts are manufactured in various industries. With this regard, the numerical simulations of a kind of coated sheet deep-drawing process were conducted using LS-DYNA in this paper. The model takes into account the coating/substrate composite may delaminate or crack during drawing, the combination of coating and substrate was defined as tied with failure contact. The results of the simulations revealed that the substrate (steel sheet) and the nickel coating did not delaminate at the interface. Furthermore, it was found that the punch-nose radius is the danger zone for the break and at this zone, the thickness of the coating was thinner than the substrate, some experiments were done to validate the simulated results. At last, the influences of friction coefficients were analyzed and the result that greater friction coefficients will lead to increase the tendency of crack was attained.
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