拔长矩形截面毛坯(W/H=0.7)的滑移线新解

New Slip-Line Solution of Stretching a Block (W/H=0.7) with a Rectangular Section

本文建立了存在接触摩擦剪应力时的拔长体 (砧宽比 W/ H =0 .7)内滑移线场 ,推导出单位变形力 ,求解了变形体内部应力场。计算结果表明砧宽比等于 0 .7时 ,拔长体内存在轴向拉应力。并求出了垂直对称线上轴向应力由压应力转变成拉应力的过渡点。

In this paper,the slip-line field of a stretching body (W/H=0.7) with frictional shearing stress existing is built,the unit deformation force is deduced,and the stress field in the deformation body is calculated.The calculation results shows that there exist axial tensile stresses in a stretching body when W/H=0.5.The interim point on the vertical symmetrical line at which the axial stress changes from the compression stress to tensile stress is further found.