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- Introducing the time-dependent damage variable into the constitutive equations of the crack zone, we modified the Dugdale model of crack damage zone around crack-tip. 对裂尖银纹损伤区的Dugdale模型进行了修正,将时间、位置、应变相关的损伤变量引入到银纹区的本构方程中。
- The damage zone development and damage evolution ahead of a crack tip in an dutile metal specimen are studied from the viewpoint of continuum damage mechanics. 从连续介质损伤力学的基本理论出发,研究了金属试件中裂纹尖端损伤区的发展和区内损伤的演变。
- Secondly, cell interpenetration engendered during bubble phase is the micro crack of the foam and acted as defects of the material. 2.;聚氨酯硬泡发泡过程中形成的泡孔互穿是材料断裂微裂纹的形核地点,材料的断裂基本属于脆性断裂,但是也有部分的韧性断裂。
- Wavelet theory was used to monitor the debond and crack damage in an FRP(fiberglass-reinforced plastics) composite sandwich beam respectively. 探索采用小波分析方法,对FRP(玻璃钢)夹层梁的脱层损伤和裂纹损伤检测分别进行试验研究。
- Wavelet theory was used to monitor the debond and crack damage in an FRP (fiberglass-reinforced plastics) composite sandwich beam respectively. 摘要探索采用小波分析方法,对FRP(玻璃钢)夹层梁的脱层损伤和裂纹损伤检测分别进行试验研究。
- A great deal of analysis and research indicates that the crack damage is controlled by the key stratum in the overburden strata. 大量研究表明,这种裂缝损害受覆岩中关键层的控制。
- Therefore, it is concluded that crack damage of steel beams can be identified by monitoring the variations of piezoelectric impedance measurements. 由此可见,通过测量钢梁损伤前后压电陶瓷片的电阻抗变化能够识别梁中的裂纹损伤。
- Then a new modeling method is brought forward to build the digitized TBM's damage zone based on interpolation. 先确定出垂直杀伤区的边界,然后确定水平杀伤区边界,并进行修正,近似地确定出杀伤区。
- Sometimes it is needed to determine the rockmass damage zone around a tunnel for the purpose of sup-port. 还探讨了如何通过改进套筒致裂技术来实现由围岩应力测试发展到原岩应力测试以及围岩损伤区的测定。
- The research results show that micro cracks act as an important role in the wear process of PCD tools. 同时,研究表明微观裂纹特征对聚晶金刚石刀具的磨损起着重要的作用。
- It is necessary to study the damage zone for analysing low-altitude antimissile efficiency of ship to air missile. 摘要为分析网络化舰空导弹低空反导作战效能,必须研究其杀伤区。
- Based on rock meso-damage and fracture mechanism, it is presented that the crack growing is the removal process of damaged zone due to the gradual damage from the crack tip to the around rock. 基于岩石细观损伤断裂理论,认为裂纹扩展的过程就是裂纹尖端到周围岩石的逐渐损伤引起的损伤区移动过程;
- 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。
- Analyzed the reason and influential factor and ascertainment method on the depth of original damage zone and mined damage zone. 分析了原始导高带及采动导高带的原因和影响因素及其确定方法;
- Beneath the corrosion products,inner surface of the elbows existed micro cracks from inside to outside inter-granularly,which displayed the characteristic of hydrogen corrosion. 三相微粒流造成已形成的腐蚀膜剥离,并使因氢蚀后形成晶界裂纹失去联系的晶粒与金属分离;
- 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。
- The confirming of damage zone of is one of the most important problems in the course of SAM intercepting the tactical ballistic missile. 如何有效确定地空导弹反导杀伤区一直是地空导弹反导作战过程中一个难题,因此提出一种确定杀伤区的仿真方法。
- Beneath the corrosion products, inner surface of the elbows existed micro cracks from inside to outside inter-granularly, which displayed the characteristic of hydrogen corrosion. 腐蚀产物覆盖下的内壁表面管材基体形成由内向外的微裂纹,沿晶开裂,呈现氢腐蚀特征;
- This can be a basis for eliminating the case crack damage by restraining the occurrence of the dangerous bending moments through improving the mounting conditions of the power-train system. 这为通过改进传动系的支承条件,避免壳体出现早期破裂损坏提供参考依据。
- By means of experiment, the development of Fuxin fine sandstone minerals formation, micro configuration and the inner micro cracks were observed on a scale. 本实验在细观尺度下观测了不同温度条件下,阜新细砂岩的矿物组分和微结构及其发展变化,以及内部微裂纹的发生和发展。