It is found in the survey that the sliding surface has a three segments form, including sliding surface of forward edge, drawing open surface of back edge and shearingsurface of inter part.
考察中发现，滑动面具有前缘滑移面、后缘拉裂面和中间剪断面的三段式形态。
2
Finally the shearing fatigue model of the surface strengthening spring is suggested.
最后给出了表面强化弹簧的剪切疲劳模型。
3
Increasing the arch thrust augments the shear stress on the surface of the shearing resistance part, which counteracts the influence of the crushed rock.