【摘要】 当矩形平端刚性压头作用在无摩擦弹性基体的表面时,在基体表面生成一个平面压痕,同时在压痕边界处的近表面诱生奇异应力场,该奇异应力场的奇异性与裂纹尖端I-型应力场的奇异性同价,使平面压痕的表面产生断裂型开裂。利用能量释放率原理,分析压痕边界断裂开裂的极限开裂角、极限开裂载荷等相关问题。更多还原

【Abstract】 When a frictionless elastic substrate was subject to indentations by the rectangular flat-ended,rigid indenter punch,a plane indentation was generated in the substrate surface.While the indentation boundary near the surface induced singular stress field.The singular stress field of the singularity was equivalent of the crack tip I-type.So that the surface of the indentation fracture plane generated type crack.By using the principle of energy release rate,the indentation cracking ultimate boundary cracking angle,critical cracking load and other related issues were analysised.更多还原