直杆受弯超载截面表层塑性变形深度的确定

为了提高金属零部件的强度,常采用预先使零件承受超载,使局部产生塑性变形。圆截面直杆,在超载弯曲情况下,如何求表层塑性变形深度。杆件在弯矩作用下,其轴线要发生弯曲,其曲率是求截面应力、应变和塑性变形深度的关键物理量。先给定若干个曲率再求出若干个与之对应的弯矩,绘出二者一一对应的关系曲线,利用此曲线定出与实际弯矩对应的曲率。

Determination of depth of surface plastic deformation at cross section of straight rod under bending overload

In order to improve the strength of metal partsWE often makewetal parts withstand overload so that partial plastic deformation is produced.But how to derive the depth of surface plastic deformation at the circular cross section under overload bending is a problem.The axis line is bent when the roa part is under the action of bending moment.its curvature is the key physical quantity for deriving the stress of the cross section,strain and the dept of the plastic deformation.First give several curvatures and t...