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. And the distributed force F=αp is applied to main crack surface (as shown in Fig. 1); 2) When water enters into wing crack, wing crack propagating becomes a distributed force applied to wing crack...J. Cent. South Univ. (2012) 19: 578-585 DOI: 10.1007/s11771-012-1042-1 Wing crack model subjected to high hydraulic pressure and far field stresses and its numerical simulation ZHAO Yan-lin(赵延林)1, 2......
and short-bar microstructures in TC4ELI alloy were studied. CTPZ of the two microstructures were compared by SEM and TEM observations. The influence of CTPZ on the crack propagating style and crack closure level were analyzed in the two microstructures. The results reveal that, compared with the short-bar microstructure, the larger CTPZ and flexuous crack propagating route in the lamellar......
to the crack plane. Under normal stress, the crack tip is open, the propagating direction is perpendicular to the stress, and the local stress near the crack tip is In the course of crack expansion, due... Interaction of crack with twins in hot-rolling AZ31 magnesium alloys during in-situ TEM straining experiments WU Luo-yi(吴落义)1, WU Cui-lan(伍翠兰)1, XIA Wei-jun(夏伟军)2, CHEN Zhen-hua(陈振华)2 1. Center......
Piezoelectric-based Crack Detection Techniques of Concrete Structures:Experimental Study朱劲松摘 要:Feasibility of a wave propagation-based active crack... used as sensors to detect the propagating wave.Scattered wave signals from the damage can be obtained by subtracting the baseline signal of the intact structure from the recorded signal of the damaged......
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......
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......
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