An adiabatic shear band formed along the main shear stress around the penetrated hole is approximately consistent with the direction of plastic deformation slip lines in static state.

弹孔周围的绝热剪切带沿主剪应力方向形成，与静态塑性变形滑移线方向接近，绝热剪切带上不均匀的变形将产生微裂纹和微孔洞。

youdao

The results show that the stress and strain distribution around the cold worked hole are similar between the model and real object.

结果表明：带衬套挤压和不带衬套冷挤压时孔边载荷的分布，模型材料与原型实际挤压结果相似；

youdao

The project of hole releasing adopted can form a protection shell with low earth stress and fuel gas pressure around the shaft, and the outburst was prevented effectively and economically.

采用钻孔释放方案，在井筒周围形成一个低地应力、低油气压力保护壳，能经济有效地预防突出。

youdao