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J. Cent. South Univ. Technol. (2009) 16: 0658-0662 DOI: 10.1007/s11771-009-0109-0 Strain rate effects on sand and its quantitative analysis LI Fu-lin(李福林)1, 2, PENG Fang-le(彭芳乐)1, 2, LI Jian...; Abstract: Strain rate effects on the stress-strain behavior of sand were investigated by performing special plane strain and triaxial compression tests......
are induced in the system. The epitaxial growth model is affected by the corresponding strain energy induced by the atomic misfit of film-substrate. When an epitaxial growth thin film is deposited onto... dislocations occur practically in most epitaxial growth films. With strain increasing, the energy of the film increases, the strain in the film is relaxed by formation of the misfit dislocations. When......
by an anisotropic elastic energy change and charge transfer. The lower migration energy along certain directions under strain can facilitate the segregation of helium and the formation of helium bubbles... bonding and a lower solution energy. This is due to the coupling between the symmetrical facts of the two interstitial atoms and the 3 d orbitals of Fe atoms. The solution energies of both sites......
一种低碳钒微合金钢的动态再结晶与析出行为陈礼清1,赵阳1,徐香秋2,刘相华1(1.辽宁省沈阳市东北大学轧制技术及连轧自动化国家重点实验室2.中国第一汽车集团公司技术中心)摘 要:利用热力模拟实验技术,OM及TEM等,研究了一种低碳含V微合金钢在温度为900-1150℃及应变速率为0.01-10s-1条件下奥氏体动态再结晶和析出行为.采用回归法确定了该微合金钢的热变形激活能和表观应力指数,建立了该钒微合金钢的热加工方程;根据应变硬化率与应力的P-J方法,结合高阶多项式拟合,精确确定了动态再结晶临界应变值,获得了临......
and shear strain rate. Fault band undergoing strain softening and elastic rock mass outside the band constitute a system and the instability criterion of the system was proposed based on energy theory...Dynamic analysis of fault rockburst based on gradient-dependent plasticity and energy criterionXuebin Wang, Xiaobin Yang, Zhihui Zhang, and Yishan Pan1) Department of Mechanics and Engineering......
Structural damage identification using element strain energy method based on sensitive modals ZHANG Xiaozhong1, 2, YAO Wenjuan1 (1. Department of Civil Engineering, Shanghai University, Shanghai 200072... sensitivity for the damage element strain energy change were selected. Based on this, an efficient structural damage identification method with better robustness was established. Starting from......
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-crack tip was characterized for rock damage, and the wing crack length was obtained using Newton iteration based on the strain energy density for mixed-mode fracture. The distribution of micro-cracks... show that the proposed elastoplastic damage model agrees well with the experimental results for two rock tests under uniaxial compression. Key words: micro-cracks; strain energy density; Newton......
Solution of rectangular bar forging with bulging of sides by strain rate vector inner-product WANG Lei1, JIN Wen-zhong2, ZHAO De-wen3, LIU Xiang-hua3 1. School of Materials Science... of a rectangular bar with flat tools. The effective strain rate for rectangular bar forging with bulging was expressed in terms of four-dimensional strain rate vector. The inner-product of the vector......
mechanism is that twinning and stress induced phase transfo rmations are attribute to higher stress concentrations at β grain boundaries and additional energy supplied by a higher strain rate,as well...Effect of strain rate and temperature on the deformation behavior in a Ti-23.1Nb-2.0Zr-1.0O titanium alloyYi Yang1,Di Xu1,Sheng Cao2,Songquan Wu1,Zhengwang Zhu3,Hao Wang3,Lei Li4,Shewei Xin4,Lei......