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- With the increase of crystallinity , the crack initialing energy tends to growth, the crack extension energy tend to decreasing, the fractal dimension on impact fracture surface decrease. 分子量分布宽度的变化对各晶面法向晶粒尺寸的大小基本无影响。
- crack initiation energy 裂纹发生的能量
- Material Quality and Crack Initiation. 原料质量、及初始裂纹的寿命。
- The fractography of the fatigue crack initiation displayed cleavage f... 裂纹形成的断裂为穿晶解理机制,预应变可导致更多的二次裂纹。
- Crack initiation and propagation process in A356 aluminium alloy under impact load have been investigated. 研究了A356铝合金在冲击载荷作用下的裂纹萌生及其扩展过程。
- For the notched specimens, there are multiple crack initiation sites on the fractography. 瞬断区所承受的断裂应力随循环应力升高而降低；
- The evaluation of crack initiation life is directly affected bythe reliability of nondestructive testing. 检测方法的可靠性直接影响结构疲劳裂纹形成寿命估计值。
- The threshold of the fatigue crack initiation from the notch of the microbeam is close to that of the bulk material. 疲劳裂纹从尖缺口处萌生的门槛值接近块体材料。
- Experimental results showed that a "U" shape curve existed between the critical initiation energy and IPN equivalence ratio. 实验结果证明了 IPN的临界起爆能与燃料当量比成“U”形曲线关系 ;
- The addition of AlO_2 tended to shorten the period of time for crack initiation, whereas to retard crack propagation. 对钢的应力腐蚀存在双重影响,即促进裂纹萌生,同时又对裂纹扩展起抑制作用。
- fracture energy at crack initiation 裂纹引发断裂能
- 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。
- Fractography analyses with scanning electron microscopy (SEM) were conducted to investigate the corrosion fatigue crack initiation mechanism. 此外，亦利用扫描式电子显微镜(SEM)观察破断面，以了解疲劳破坏机制。
- Experiments demonstrate that leaf spring crack results from rust spot as fatigue crack initiation,and in order to improve spring life it must be to improve coating quality. 通过试验证明了锈点是导致钢板弹簧断裂的新的疲劳源,为提高弹簧的使用寿命必须提高其涂层质量。
- By use of a vertical shock tube,the detonation limit,critical initiation energy,de tonation pressures and detonation velocities of nitric ether(IPN) air mixture were determined experimentally. 采用立式激波管对硝酸异丙酯(IPN)与空气混合物的爆轰极限、起爆能、爆压和爆速进行了测定,同时从理论上对该燃料的爆轰参数作了计算,计算结果与实验值吻合较好。
- The microprocess of crack initiation and propagation in pearlite under fensile loading has been investigated by in situ observation using a transmission electron microscope. 在透射电镜中进行动态拉伸原位观察珠光体裂纹萌生与扩展的微观过程。
- Discontinuous shot-peening can lead to crack initiation at the tensile surface stresses adjacent to edges of abrupt compressive layer runouts (no fadeout). 受表面张力作用，不连续喷丸会导致在压缩层过渡段突变的边沿出现裂纹。
- With the decrease of spherulite size, the crack initiating and extension energy all increase, comprehensive effect make the toughness of marerials increase. 对于单相PP材料，不同工艺条件下其结晶形态结构参量的变化是影响其力 学性能的直接因素，表现在高的结晶度对拉伸强度有利而对冲击性能不利。
- The pre-straining prolonged the fatigue crack initiation life, and increased resistance coefficient and equivalent stress threshold of the fatigue crack initiation. 预应变可以延长疲劳裂纹形成寿命，提高疲劳裂纹形成的抗力系数和裂纹形成的当量应力门槛值；
- The results indicate that the crack initiation and propagation mechanism depends on the orientation of pearlite lamellae with respect to the tensile axis. 结果表明:珠光体裂纹萌生与扩展方式取决于珠光体层片和拉伸轴的位向关系。
