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SHORT FATIGUE CRACK PARAMETER BASED ON THE TOTAL CRACK AREA X.C.Wu1,Z.X.Wu1 (1.Engineering College,Yangzhou University,Yangzhou 225009,China) Abstract:The progressive fatigue damage of a material... testswere carried out using smooth specimens of medium-carbon steel.The behavior ofshort crack propagation during fatigue was examined and a new parameter "totalcrack area" was suggested.The aim......
J. Cent. South Univ. (2019) 26: 3045-3056 DOI: https://doi.org/10.1007/s11771-019-4235-z Crack evolution behavior of rocks under confining pressures and its propagation model before peak stress ZUO... University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019 Abstract: The understanding of crack propagation characteristics and law of rocks during the loading process is of great......
FATIGUE CRACK PROPAGATION OF Ni-BASE SUPERALLOYS L.Z.Ma1,E.Barbero1,X.B.Liu1,K.M.Chang1 (1.Dept. of Mechanical & Aerospace Engineering, West Virginia University, Morgantown,WV 26506-6106, USA) Abstract:Time-dependent Fatigue Crack Propagation (FCP) behaviors of five Ni-base superalloys were investigated at various temperatures under fatigue with various holding times and sustained loading......
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Crack spacing threshold of double cracks propagation for large-module rackZHAO Tie-zhu(赵铁柱), SHI Duan-wei(石端伟), YAO Zhe-hao(姚哲皓), MAO Hong-yong(毛宏勇), CHENG Shu-xiao(程术潇), PENG Hui(彭惠) (School... inclusions and surface cracks. To ensure its safety in the future service, studying on crack propagation rule and the residual life estimation method of large-module rack is of great significance......
A METHOD OF AS-CAST CRACK PREDICTION BASED UPON NUMERICAL SIMULATION OF SOLIDIFICATION J.Z.Jin1,X.S.Zheng1,S.Yao1 (1.Research Center of Foundry Engineering, Dalian University of Technology,Dalian 116024, China) Abstract:Based on the numerical simulation of solidification of castings, a thermal stress formula and a thermal crack initiation criterion are established, which suggest......
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......
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...%. The crack paths, generated by Vickers indentation on the polished surfaces of both composites, were analyzed from a fractal point of view to distinguish the possible toughening mechanisms involved......