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morphology according to rolling direction Following fatigue crack incubation, the deviation of growth direction occurs during the propagating process due to the various resistances acted on the crack tips[13... to study the fatigue fracture of the T7451 Al-Zn-Mg-Cu alloy (470 ℃, 60 min+115 ℃, 8 h+165 ℃, 16 h). The study reveals mainly the microscopic structure of the alloy in the process of crack formation......
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A NOVEL PARAMETER FOR EVALUATING THE FATIGUE CRACK GROWTH RATE IN CARBON STEELS H.Nisitani1,S.Q.Zhu2,N.KAWAGOISHI3,X.S.WANG2 (1.Faculty of Engineering,Kyushu Sangyuo University,Fukuoka,812,Japan... for evaluating the fatigue crack growth rate in carbonsteels.Fatigue crack propagation tests of an annealed 0.42% carbon steel were carriedout under different conditions to investigate the relationship between......
Crack branching mechanism of rock-like quasi-brittle materials under dynamic stressTANG Chun-an(唐春安), YANG Yue-feng(杨岳峰)(Center for Rock Instability and Seismicity Research, Dalian University of Technology, Dalian 116024, China)Abstract:The cracking patterns of a thin sheet with a pre-existing crack subjected to dynamic loading are numerically simulated to investigate the mechanism of crack......
Crack detection of reinforced concrete bridge using video imageXU Xue-jun(许薛军)1, 2, ZHANG Xiao-ning(张肖宁)1(1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China;2. Administration Bureau for Highway of Guangdong Province, Guangzhou 510075,China)Abstract:With the digital image technology, a crack detection method of reinforced concrete......
, the velocity of crack initiation of Al-4.5%Cu alloy without Ce addition is obviously greater than that of alloy with Ce addition, and during the period of crack propagating, the largest propagation velocity occurs under the former condition. After the initiation of crack, the crack propagating of alloys with 0.5%Ce addition is accelerated evidently because of the appearance of needle rear earth rich......
Crack propagation of Mg-Li alloys by impact load QU Zhi-ming(曲志明)1, LIANG Xiao-ying(梁晓颖)1, ZHOU Xin-quan(周心权)2, SHI San-yuan(史三元)1 1. School of Civil Engineering, Hebei Engineering University...> Abstract: Under impact load, using energy estimation and updated finite element method, the crack propagation of Mg-Li alloys was studied, and the relations between high speed impact, time interval......
propagating under the maximum stress drop along the vertical crack plane direction, and the wing crack on the outer side of the crack continues to expand along the maximum loading direction under...; 文献标志码:A 文章编号:1672-7207(2019)12-3035-11 Particle flow analysis of parallel double crack evolution under uniaxial compression LI Yong1, 2, CAI Weibing1, 2, ZHU Weishen1......
ON FATIGUE CRACK PATH DEVIATION AT ELEVATED TEMPERATURE IN ELECTRON BEAM REPAIRED WELDMENTS OF TURBINE DISK L.H.Li1,Y.H.Zhang1,X.A.Zhang2,H.Y.Zhao3,H.Q.Zhang3 (1.School of Mechanical Engineering..., Tsinghua University, Beijing 100084, China) Abstract:Fatigue crack growth behaviors in electron beam weldments of a nickel-base superalloy are studied. The objective of this paper is to discuss effects......
J. Cent. South Univ. (2017) 24: 866-874 DOI: 10.1007/s11771-017-3489-6 Crack growth analysis for rock-like materials with ordered multiple pre-cracks under biaxial compression WANG Min(王敏)1, 2, CAO... in these experiments. Through biaxial compression experiments, the influence of both the number of pre-cracks and pre-cracks angles to crack growth was analyzed. Meanwhile, species of rock bridge failure were summarized......
