| 1. | Statistic analysis of the evolution laws of micro cracks in rock failure process by finite element method
岩石破裂过程微裂纹演化规律有限元统计分析 |
| 2. | The micro cracks of concrete that formed during the injury evolution have obvious self - similarity features , which are known as fractal features
摘要混凝土在损伤演化期间所形成的微裂纹具有明显的自相似特征，即分形特征。 |
| 3. | It can also create micro cracked edges if the speed is forced to remain higher , which can create quality concerns downstream during following passes
如果强制保持较高轧制速度，则也会导致微裂边，从而对后道次加工过程中的下游工序造成质量问题。 |
| 4. | The research shows that the fractal theory can be used to describe quantificationally differentiate and anomalistic micro cracks of concrete that formed in injury evolution
研究表明，用分形理论方法可以定量描述和区分混凝土在损伤演化期间形成的极其不规则的微裂纹。 |
| 5. | In the process of mass concrete casting , defects will be produced such as micro cracks of surface and inside resulting from the different temperature between the surface and the inside
大体积混凝土结构在浇筑过程中，由于受到内外温度变化的影响，从而导致混凝土体内或表面形成裂缝。 |
| 6. | Using the failure criterion of maximum equivalent stress and the method of element birth and death , the space distribution features of small earthquakes ( micro cracks in rock ) before a strong earthquake are simulated
利用最高应力破裂准则、释放破裂单元刚度生与死的方法，模拟强震前岩石的破裂和小震的空间分布特征。 |
| 7. | The processes of propagation , kinking of micro cracks in concrete and the interaction among cracks as well as the induced failure are analyzed by using the model describing the wing type crack from the view point of micromechanics
摘要本文从混凝土细观机理出发，采用翼型裂纹模型分析了围压荷载下混凝土内微裂纹扩展、弯折和相互作用直至材料破坏的过程。 |
| 8. | When mass concrete forms , defects will produce such as some micro crack resulting from the different temperature between the surface and the inside . how this micro crack forms and develops is a very important subject hi materials
混凝土结构、尤其是大体积混凝土结构在浇筑成形的过程中，由于受到内外温度变化的影响从而使混凝土体内或表面形成细微裂隙等缺陷，研究细微裂缝（微裂纹）的形成与发展在混凝土材料学中是一项十分重要的课题。 |
