Abstract: Local mechanical behavior of materials was analyzed by means of punch-shearing test combined with a revised finite element simulation algorithm. For the numerical model, a special revised iterative process was put forward to work out the strain-stress curves for an unknown material by matching the simulated reaction force curves with those of test results. Therefore, an indirect method for material characteriza- tion was presented based on the punch-shearing test. In addition, the process accuracy was validated by using aluminium alloy 5052H34 and 6063T5 for automobile and red copper as test materials. The results show that maximum error between indirect and direct way is less than 5%, which can be accepted on the whole. This indirect material characterization method can be used for local or micro-zone material modeling, which will be a useful tool for material characterization of inhomo- geneous welded joints.

Key words: Finite element simulation, Local mechanical behavior, Punch-shearing test