片側に延長切欠きをもつ軟鋼長方形はりの塑性曲げに関する一実験

抄録

In the present paper, the problem of plastic yielding of notched steel plates subjected to pure bending is investigated experimentally. The test pieces examined are 0.34%C carbon steel plates which have a single wide notch with circular fillets. Six shapes of notches are examined. To clarify the effects due to the difference in the shape of notches, Lueders' bands and strain figures developed in the plates are observed in detail during the elastic-plastic stage of bending. The values of bending moment defined as the Limit or Collapse Moment are obtained for each notch. Constraint factor for each notch is given. They show the effects of the constraint of plastic deformation given by the neighbouring elastic regions.