| 1. | Study on nucleating location and formation of fretting fatigue cracks
微动疲劳裂纹萌生位置及形成方式研究 |
| 2. | The measurement of crack initiation in three - point bending fatigue of 40cr steel
钢疲劳裂纹萌生寿命的测量 |
| 3. | Failure state random function method for digital simulation of turbine disc crack initiation and propagation
涡轮盘裂纹萌生扩展数字仿真的故障状态随机函数法 |
| 4. | So it establishes the essential foundation for studying the crack ' s initiation life of powder metallurgy turbine disks with inclusions
为深入研究含夹杂粉末冶金涡轮盘裂纹萌生寿命打下必要的基础。 |
| 5. | Biaxial analysis was used to get the multiaxial information , and fatigue calculation of multiaxial crack initiation was conducted
寿命预测采用多轴裂纹萌生疲劳分析，其中部件的多轴特性通过二轴分析获得。 |
| 6. | The microprocesses of fracture in commercial purity metals ( fe , al , ti and mg ) were observed by in - suit tension in tem
在扫描电镜中原位观察球墨铸铁微微裂纹萌生与扩展过程，从而能更深入地探讨断裂的微观机理。 |
| 7. | According to the observed results near the fracture surfaces , the orientations of the fatigue crack initiation and propagation were investigated to study the mechanism of multiaxial fatigue crack propagation
根据薄壁管拉扭复合载试件断口附近表面观测结果，统计其裂纹扩展的位向，研究多轴疲劳裂纹萌生及扩展机理。 |
| 8. | In this thesis , in order to search the condition and reason of failure for a combustor , thermal stress was analyzed in steady and transient temperature field . according to the investigation , three conclusions are obtained
在忽略瞬态升温过程得到的稳态温度场作用下，火焰筒的热应力不足以导致裂纹萌生，所以仅进行稳态分析不能得到合理的结论。 |
| 9. | At present an important subject is researched on prediction methods of the initiation life of rolling / sliding contact fatigue of surface hardening layer based on shakedown theories under cycle contact loading for the strategies of applications of contact element , such as gears , bearings , and railroad rails
接触体表面强化(喷丸、涂层)层的疲劳裂纹萌生寿命的研究，是当前齿轮、轴承等接触件失效分析中的前沿课题。它具有重要而广泛的工程背景。 |
| 10. | This kind of homogenization is very important to the investigation of concrete structures and numerical analysis of engineering . but it is difficult to use these models to study the complete failure process caused by the initiation , propagation and coalescence of cracks when subjected external loading
这种简化对于研究混凝土工程结构及进行稳定性的数值分析是非常必要的，但是却难于研究混凝土材料在外荷载作用下裂纹萌生、扩展及贯通而导致的由细观层次到宏观层次的损伤和断裂过程。 |
