The three-dimensional finite element method was used to study the mechanism of fracture initiation in oriented perforation.
基于有限元三维应力分析,研究了定向射孔下水力裂缝的起裂机理。
参考来源 - 新井定向射孔转向压裂裂缝起裂与延伸机理研究On basis of analyzed starting-crack mechanism of hydraulic fracture bore, analyzed the mechanics condition of quondam cranny's extending and hypo-cranny's starting-crack,compiled the program by use of MATLAB, the numerical value analysis outcome validated the correctness of theoretic analysis.
在分析了水力压裂钻孔起裂机理的基础上，进一步分析了原一级裂隙弱面扩展延伸和次级弱面发生起裂的力学条件，并通过MATLAB语言编制了钻孔起裂、弱面扩展延伸和次级弱面起裂的数值计算程序，数值分析结果验证了理论分析的正确性。
参考来源 - 本煤层水力压裂致裂机理及裂隙发展过程研究·2,447,543篇论文数据，部分数据来源于NoteExpress
这一处理方法起到延缓裂纹扩展、抑制起裂的效果。
This treatment has an effect on delaying the crack extension and hence suppressing its cracking.
复合型裂纹起裂、扩展和止裂问题一直是断裂力学研究的重点。
The study of problems involving crack initiation, propagation and arrest is always the interest of fracture mechanics.
确定水力裂缝在井壁处起裂的压力和方式，对水力压裂设计和施工有重要的作用。
It is important for fracturing design and operation to determine hydraulic fracturing initiation pressure and mode.
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