軟鋼板の平行および切欠試験片の降伏過程

概要

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The propagation of the Luders' bands in straight specimens of mild steel of various cross-sectional shapes under uniaxial tension is investigated by use of the Moire-fringe method. It is confirmed that a discontinuous deformation takes place acorss the Luders' band. A numerical simulation of the propagation of the Luders' band (elastic-plastic boundary) in the notched sheet specimens of a rimmed steel is performed by incremental elastic-plastic FEM with a new idea about the yield-point-elongation phenomenon and is confirmed to agree well with a corresponding experiment which is visualized by the Moire-fringe method with a new technique. The idea is that the typical yield-point elongation strain in the stress-strain curve of an arbitrary infinitesimal element in a mild steel should be understood as the strain which jumps drastically, and not as a continuous property as conventionally understood.
一般社団法人日本機械学会の論文
1988-01-25