On the Plastic Zone around a Crack Tip in a Rock Specimen
The stress intensity factors (SIFs) for a infinite volume were corrected by two dimensionless quantities YⅠ and YⅡ which were obtained by employing the Boundary Collocation Method (BCM).The expression of the elastic-plastic boundary of a mixed crack for a cracked specimen was formulated based on the Mises yield criterion.Finally,the shape and scale of the plastic zone for tensile-shear cracks and compressive-shear cracks were analyzed and some meaningful conclusions were obtained.The results show that:the shape of a cracked specimen has an significant effect on the plastic zone; the scale of the plastic zone is much smaller than its real scale under the assumption of infinity volume; the orientation angle of a crack affects both the shape and scale of the crack tip plastic zone significantly under tension; the friction between the crack surfaces can reduce the scope of the crack tip plastic zone effectively under compression.
Mises yield criterion Stress intensity factor Plastic zone Boundary collocation method
T.Ai C.H.Wu R.Zhang Z.Y.Xiang Y.Y.Yuan S.Y.Wang
State Key Laboratory of Hydraulic and Mountain River Engineering,School of Water Resource and Hydrop School of Resource and Environmental Science,Chongqing Univ.,Chongqing 400030,China Changjiang Chongqing waterway engineering Bureau,Chongqing 400000,China China construction steel Structure corp.LTD.,Shenzhen 518000,China China construction eignth engineering division,corp.LTD.,Shanghai 200120,China
国际会议
沈阳
英文
683-686
2012-09-26（万方平台首次上网日期，不代表论文的发表时间）