It shows that, compared with the frozen intact rock sample, the man-made crack cn seriously affect the location of new crack generation and the formation of connectivity macro-crack of frozen cracked-rock sample. 研究结果表明,与无预制裂隙的冻结岩石试样相比,已有预制裂纹对冻结裂隙岩石中新裂纹的起裂位置及贯通性宏观破坏裂纹的形成具有重要影响。
Referring to the experiments done by former researchers, the principle of fatigue failure has been analyzed in detail and the process of fatigue failure has been illustrated, which includes micro-crack's initiation and growth, macro-crack's propagation and final instantaneous fracture. 结合前人所做的试验,对疲劳失效原理进行剖析,详细论述了疲劳失效的全过程,即微裂纹的萌生和增长,宏观裂纹的形成与稳定扩展,裂纹的最后失稳扩展导致断裂。
Effect of Loading Rates on Macro-Crack Bifurcation of Rock 岩石宏观裂纹分叉的加载率效应
It is very important to measure the elastic and plastic deformation in the strain concentration zone for studying damage or the micro-crack generating and avoiding macro-crack generating and growing in materials. 测量应变集中区域的弹塑性变形,对于研究材料损伤或微裂纹的产生,以预防宏观裂纹的产生及扩展具有重要的意义。
Rock failure can also be seen as a process of their internal structure surface formation and reconstruction, the micro-crack initiate, macro-crack formate, structure surface slide along the contact surface in this process. 岩石破坏过程也可看成是其内部结构面形成、重构的过程,在这个过程中,微裂纹萌生、宏观裂纹形成、结构面贯通及沿接触面滑移等现象交织在一起。