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http://dx.doi.org/10.3795/KSME-A.2014.38.12.1441

Investigation into Crack-Tip Constraint of Curved Wide-Plate using Q-Stress  

Lee, Hwee-Sueng (Dept. of Mechanical System Design Engineering, Seoul Nat’l Univ. of Science and Technology)
Huh, Nam-Su (Dept. of Mechanical System Design Engineering, Seoul Nat’l Univ. of Science and Technology)
Kim, Ki-Seok (Energy Infrastructure Research Group, POSCO)
Shim, Sang-Hoon (Energy Infrastructure Research Group, POSCO)
Cho, Woo-Yeon (Energy Infrastructure Research Group, POSCO)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.38, no.12, 2014 , pp. 1441-1446 More about this Journal
Abstract
In the present paper, the effects of the thickness and width of a curved wide-plate, the crack length, and the strain hardening exponent on the crack-tip constraint of the curved wide-plate were investigated. To accomplish this, detailed three-dimensional elastic-plastic finite element (FE) analyses were performed considering various geometric and material variables. The material was characterized by the Ramberg-Osgood relationship, and the Q-stress was employed as a crack-tip constraint parameter. Based on the present FE results, the variations in the Q-stress of the curved wide-plate with the geometric variables and material properties were evaluated. This revealed that the effect of out-of-plane constraint conditions on the crack-tip constraint was closely related to the in-plane constraint conditions, and out-of-plane constraint conditions affected the crack-tip constraint more than in-plane constraint conditions.
Keywords
Crack-tip Constraint; Curved Wide-Plate; Finite Element Analysis; HRR Singularity; Q-Stress;
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