MICRO- CRACK的意思|示意

The specimen was scanned and reconstructed by means of Micro-CT, images of density field were obtained, and the 3D crack morphology was extracted.

采用微焦点CT对疲劳试样进行了扫描与重建，获得了密度场图像库，并提取了试样内部的三维裂纹形态。结果表明裂纹以体的形式存在。

It exhibits the viscous effect under dynamic loading case, and the effect strengthens with the growth of the micro-crack density induced by the meso-damage of material.

饱和混凝土中孔隙自由水的存在对材料的力学性能有显著的影响，动态工况中主要表现为自由水的粘性效应，且该效应随细观损伤引起的微裂纹密度的改变而变化。

Micro characteristic of cracks propagation research: the path of crack propagation in the heat-affected zone and weld metal is the mix of transgranular and intergranular.

裂纹扩展的微观特征研究：在热影响区与焊缝区的裂纹扩展均为沿晶与穿晶混合型。

It is obtained that the strength of the material decreases as the degree of disorder of micro-crack size distribution increases.

得到了材料的断裂强度随微裂缝长度随机分布无序度的增加而降低的规律性。

There is a macro-crack and micro-crack system in rocks, which affects almost all the mechanical properties of rocks, especially the failure mechanism and the strength criterion.

岩石内部存在一个宏观的和微观的裂隙系统，岩体的一切力学特性几乎都与这个裂隙系统有关，当然岩体的破坏机理与强度准则也不例外。

The results show that the axle has defects in heat treatment, which leads to micro crack in early stage of service life and the extended crack finally causes fatigue fracture.

结果表明，该轴热处理上存在的不合理之处，导致轴在服役早期出现微裂纹，部分微裂纹在工作应力的作用下疲劳扩展，最终产生疲劳断裂。