Métodos temporales para determinar deformaciones límite en chapas metálicas

ABSTRACT The forming limit diagram (FLD) –broadly used to characterize sheet-metal formability– is made by means of strain measurement over the surface of stretched samples and the subsequent determination of limit-strain values associated with the onset of necking. Currently, researchers can make strain measurements with digital image-correlation analysis (DIC). Data measured by DIC easily adapt to the traditional position-dependent method for evaluating limit strains, but this method is not applicable to materials that exhibit inhomogeneous deformation, like multiple necking. DIC analysi...