In situ shear behavior of open-cell austenitic 316L steel foams

摘要: Abstract Foam cores in crash boxes are subjected to large shear forces during situations. Here, the failure behavior of 316L open-cell stainless steel foams under shearing conditions was investigated. A custom-made grip system used conduct situ experiments with a scanning electron microscope and digital light microscope. foam model created based on μ-CT data imported into FE software for simulation test. Furthermore, shear-induced strain fields were evaluated using image correlation. On mesoscale, cells mainly experienced torsion, while microscale, struts failed due tensile bending loading. Twisted became almost parallel loading direction, leading struts. Many slip lines developed strut walls, revealing that underwent ductile fracture. In conclusion, greatly influenced by foams.