拉E,剪物(Axial Tension&Compression,shear) 2、挤压破坏的两种形式(Two types of bearing failure) (1)螺栓压扁 (2)钢板在孔缘压成椭圆 3、挤压应力(Bearing stress) F Obs Abs Eb挤压力(bearing force) Abs-挤压面的面积(area in bearing) 4、强度条件(Strength condition))Obs ≤[o] Abs Io】-许用挤压应力(allowable bearing stress).(Axial Tension & Compression，shear) （1）螺栓压扁 （2）钢板在孔缘压成椭圆 2、挤压破坏的两种形式 (Two types of bearing failure) F F 3、挤压应力（Bearing stress)   bs bs  bs =   A F A F bs  bs = Fbs -挤压力 (bearing force) Abs -挤压面的面积（area in bearing) 4、强度条件(Strength condition) [bs]-许用挤压应力(allowable bearing stress)