Experience from using recently implemented enhancements for Material 36 in LS-DYNA 971 performing a virtual tensile test

In today’s automotive industry the development of car bodies considerably depends on the use of computer-aided tools to meet the challenges of rising product complexity and growing number of variants. Today, enabled by modern simulation software, improved material models and numerical methods, simulation has become essential for the evaluation of sheet-metalstamping processes before press tools are manufactured. Though modern material models are available, some effects are not described correctly, because some parameters are assumed to be constant. In reality, a lot of these “constant” values must be considered variable. To better represent the real material behaviour, some enhancements for the standard material models have to be implemented to get a more realistic simulation. In this paper we present the results of virtual tensile tests, comparing input- and outputparameters, using the first LS-DYNA material model with variable Lankford coefficients / R-values, yield curves, volume and Young’s modulus. All these features are now available in one material model – LS-DYNA 971 Material 36.