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J. Cent. South Univ. (2020) 27: 2440-2454 DOI: https://doi.org/10.1007/s11771-020-4460-5 Effect of loading rates on crack propagating speed, fracture toughness and energy release rate using single..., there still are many unknown or partially unknown aspects. For example, whether loading rates have effect on crack dynamic propagating behavior (propagation toughness, velocity and arrest, etc......
显微组织对TC4ELI合金疲劳裂纹扩展路径及扩展速率的影响马英杰1,李晋炜1,雷家峰1,唐振云2,刘羽寅1,杨锐2(1.辽宁省沈阳市科学院金属研究所2.中航工业北京航空制造工程研究所)摘 要:利用SEM观察了疲劳裂纹在具有片层组织的TC4ELI合金中的扩展路径,通过统计疲劳裂纹与α片层所呈的角度,分析了α和β两相晶体学取向对疲劳裂纹扩展路径的影响.基于对疲劳裂纹扩展路径的研究,测试并讨论了片层组织中晶粒和α片层对近门槛值阶段及Paris区阶段疲劳裂纹扩展速率的影响.研究表明,疲劳裂纹在片层组织中扩展时,疲劳裂纹......
means the crack in the rock starts propagating. Here, σacd is crack damage stress based on crack axial strain. After the differential stress reaches to peak strength, the rock occurs failure and post... of crack initiation which is very small before the crack propagation (Figure 5(c)). When crack starts propagating (Figure 5(d)), the initial condition can be obtained: σ1-σ3=σacd, σe=0 and H′c=hc. Applying......
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in the ATC composites is characterized by a more tortuous path, which will increase the propagating resistance of cracks. Fig.2 SEM images of Vickers indentation crack on polished surfaces... Fractal analysis of crack paths in Al2O3-TiC-4%Co composites LI Jing(李 静)1, 2 , YIN Yan-sheng(尹衍升)1 , LIU Ying-cai(刘英才)1, MA Lai-peng(马来鹏)3 1. Institute of Materials Science and Engineering......
at the propagating crack tips. These wing cracks developed in a direction (approximately) vertical to the direction of compressive line load (central loading). 3 Numerical simulation of experimental... in their simulations. Figures 10 demonstrates the PFC2D simulations of the crack propagating paths in single-cracked specimens with variable crack inclination angles, β=30°, 45°, 60°, and 90......
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classification of the propagating crack. The proposed crack tracking strategy and classification of the renewal cases promote a robust and efficient cover renewal algorithm for multiple crack propagation... stepwise. With different direction and length of the propagating crack, different PPs will be chosen for further renewal of the topological structure of the cover system. Figure 3 shows an example......
of Applied Mechanics, 2002, 69(3): 240-243. [13] LEE K H. Characteristics of a crack propagating along the gradient in functionally gradient materials [J]. International Journal of Solids...J. Cent. South Univ. Technol. (2010) 17: 1177-1184 DOI: 10.1007/s11771-010-0615-0 Crack tip higher order stress fields for functionally graded materials with generalized form of gradation YAN Xiu......
Mechanism study on subcritical crack growth of flabby and intricate ore rock YUAN Hai-ping(袁海平), CAO Ping(曹 平), XU Wan-zhong(许万忠) School of Resources and Safety Engineering, Central South...; Abstract: Double torsion specimens were applied to study the subcritical crack growth of flabby and intricate ore in Jinchuan Ⅲ Mine. The relation between......
