Tube Adaptivity for Mesh Fission/Fusion in LS-DYNA®

A new feature named tube adaptivity for sheet metal forming is implemented in LS-DYNA. It conducts adaptive mesh fission/fusion at the beginning of an adaptive step according to a predefined load path and a set of user defined parameters. Automatically mesh refinement is carried out in the neighborhood of the tool path. Tube adaptivity can help in reducing the computational time of incremental forming or roller hemming while maintain the overall accuracy at the place of interest, which can be considered as a major improvement on the original box adaptivity in LS-DYNA.