Depending on their extension, a differentiation is made between macro and micro-crack.
按裂纹延伸长度，可分为宏开裂和微开裂。
Moreover, investigated the relation among the P wave velocity, the micro-crack in rock with the variation of core diameter.
探讨了岩石的微观裂隙、超声波速度与岩芯变形之间的关系。
Since the surface of glass have many micro-crack, when the thermal stress reach the critical value, thermal breakage occur.
同时玻璃表面存在大量微裂纹，当热应力达到临界值时，在热应力的作用下产生脆性断裂。
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。
Meanwhile, the crack resistance of present crack-resistance mortar is still a poor, a certain amount micro-cracks are produced under stress.
同时现有抗裂砂浆的抗裂性仍然较差，在应力作用下会出现数量较多的微裂缝。
There is a negative correlation in terms of the complexity of the micro-crack between the coal and overlying strata has in the same position.
同一位置的煤层与岩层的微观裂隙复杂程度呈负相关。
The change of the resistance indicates the formulation and the propagation of the micro-crack in the SCFC, so SCFC has the ability of self-diagnose.
电阻的变化预示着SCFC中微裂纹的产生和扩展，因此，SCFC可以用于自身健康监测。
The induced stress of initial damage zone results in the redistribution of surrounding rock stress when the micro-crack closes after hydraulic fracture.
水力压裂后，当微裂缝闭合时初始损伤带的诱导应力导致围岩应力重新分布。
According to the mechanism that micro-cracks come into being from the dislocation, the dislocation piled-up model is used to describe the grinding crack.
研究中，将宏观断裂力学及微观断裂物理相结合，根据位错产生微裂纹机制，对磨削过程的微裂纹的形成采用位错赛积模型来描述。
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。
It is very valuable that localize the micro-crack location in rock by AE location method to investigate the process of rock failure and predict the final failure position.
用声发射(AE)定位技术确定岩石内部微破裂的发生位置，研究岩石的破坏过程，对预测岩石最终的破坏位置具有重要的实用价值。
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。
This paper presents a theoretical analysis about the propagation rule of the micro-crack in brittle materials under axial compression, based on the energy release rate criterion.
本文利用混合型裂纹扩展的能量释放率理论对脆性材料受轴向压缩时其内部微观裂纹的扩展规律进行了研究。
Glass is a kind of high-strength inorganic non-metallic material, but because of the micro-crack in the surface, glass actual strength is less one - percent of its theoretical strength.
玻璃本身是一种高强度材料，由于受表面微裂纹的影响，玻璃的实际强度仅仅是其理论强度的几百分之一。
Lots of acoustic emission during the entire loading are recorded. The recording is able to indicate the occurrence time, location and magnitude of every damage (micro-crack) in the specimen.
实验过程中记录到大量的声发射信息，它能够反映岩石试件内部每一个损伤(微裂纹)发生的时间、地点和强度。
The micro wear mechanism for PEN is plastic flow and broken of the fiber structure, while that for PI is crack initiation, extending and block fracture.
PEN薄带的微观磨损机理主要是纤维组织的塑性流动和拉断，而PI薄带的微观磨损机理为裂纹的萌生、扩张和块状剥落。
Fracture analysis of the fan shaft was made by observing macroscopic and microscopic appearances of the crack, and examining micro hardness and chemical composition of the material.
通过观察断裂风机轴裂纹宏观和微观形貌，检验化学成分、显微硬度等方法对风机轴断裂的原因进行了分析。
The micro process of crack initiation and propagation in austempered ductile iron has been investigated by scanning electron microscope with a micro tensile stage.
用扫描电子显微镜及微拉伸台对奥氏体- 贝氏体球墨铸铁裂纹萌生、扩展的微观过程进行了跟踪观察。
The forming mechanism and influencing factors of crack in laser rapid forming cladding layers are investigated through micro measurement and analysis methods.
采用微观测试分析方法对激光快速成形过程熔覆层裂纹的形成机理及影响因素进行研究。
The paper discusses the cause of and the solution to deformation and crack of micro - wave drying ceramic products, and compares micro - wave drying with traditional drying.
详细讨论了微波干燥造成陶瓷坯体变形、开裂的原因及解决方法，并与传统干燥方法进行了比较。
The result showed that the direct reason of reboiler invalidation was the intercrystalline stress corrosion and crack caused by micro-chloride in the medium.
结果表明，介质中所含的微量氯离子引起的晶间型应力腐蚀开裂导致再沸器失效。
The micro process of crack initiation and propagation in H68 brass with low stock fault energy was observed by in situ tensile test in TEM.
采用透射电镜动态拉伸、原位观察研究了低层错能合金H68黄铜断裂的微观过程。
Abstract: the simulation of acoustic emission signal processing of pressure pipeline crack micro leakage with the localization of the leaking source was carried out under the laboratory condition.
摘要：在实验室的条件下模拟压力管道裂纹微泄漏源的声发射信号处理与泄漏源定位。
The paper numerically demonstrates the pillar failure process-from micro crack to macro crack to unstable failure and studies the relations between limit load and statistical mean strength.
分析结果再现了矿柱从微破裂产生到宏观裂纹形成、最后产生失稳破坏的全过程，并研究了统计平均强度与极限承载力的关系。
The edge crack on Q345B wide strip steel was analyzed by means of chemical composition analysis, mechanical property testing, micro metallographical examination.
采用化学成分分析、力学性能测试、显微组织观察和夹杂物检验等方法对有边缘裂纹的Q 345 B宽带钢进行分析。
The forming mechanism for the crack produced in the process of laser forming 316l stainless steel powder alloy has been studied in the paper by micro measurements.
采用微观测试分析方法，针对316L不锈钢粉末，深入研究了激光快速成形过程中熔覆层的开裂行为及其形成机理。
The visual inspection was carried through the crack, then the macro and micro observation of the crack, and the microstructure and the hardness of the shell were studied.
对钛合金壳体裂纹进行了外观检查，对其裂纹断口进行了宏、微观观察，并对其组织和硬度进行了检查。
The micro crack behavior in ice is the key factor for describing and explaining ice-induced self-excited vibration.
冰内部的微裂纹行为是解释与描述冰致自激振动的关键要素。
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。
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。
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