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J. Cent. South Univ. (2018) 25: 1966-1975 DOI: https://doi.org/10.1007/s11771-018-3887-4 Effects of different numerical algorithms on simulation of chemical dissolution-front instability in fluid... instability problem in fluid-saturated porous rocks is no exception. Since this kind of instability problem has both the conventional (i.e. trivial) and the unconventional (i.e. nontrivial) solutions......
instability problem in fluid-saturated rocks has been theoretically and computationally studied over a few decades [2-20]. Many factors, such as: 1) the reactive surface area of dissolvable rock...J. Cent. South Univ. (2017) 24: 720-725 DOI: 10.1007/s11771-017-3473-1 Effects of porosity heterogeneity on chemical dissolution-front instability in fluid-saturated rocks ZHAO Chong-bin(赵崇斌)1......
to evaluate the microstructural transformations and instability phenomena. The material investigated was deformed by compression in the temperature and strain rate ranges of 300-500 ℃ and 0.001-1.0 s-1, respectively. The deformation efficiency was calculated by strain rate sensitivity (m) values obtained by hot compression tests. The power dissipation efficiency and instability parameters were......
Fretting instability characteristics for gear shaft shoulderJIA Guo-hai(贾国海), GONG Jin-ke(龚金科), E Jia-qiang(鄂加强), CAI Hao(蔡皓), WANG Shu-hui(王曙辉) (State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body(Hunan University), Changsha 410082, China)Abstract:In order to solve fretting instability problem of gear shaft shoulder due to torsional vibration in mechanical system......
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, the crack starts from a neutral plane. However, fracture morphology of rock beams under disturbance load is irregular, cracking position of fractures deviates from a neutral plane. Delayed instability of rock beam occurs for some time under constant disturbance load. When disturbance load is beyond a certain range, suddenly instability of occurs rock beam in a certain time. The results show......
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Drum instability of thinning spinning ultra thin-walled tubes with large diameter-to-thickness ratioLUO Bu-fan(罗不凡)1, LI Xin-he(李新和)1, ZHANG Xu(张旭)2, LUO Ya-zhou(骆亚洲)1(1. State Key Laboratory of High... instability problems of thinning spinning ultra thin-walled tubes with large diameter-to-hickness ratio, experiments of thinning spinning ultra thin-walled tubes with different clearances between......