Constraint Effects of Clad on Underclad Crack

[+] Author and Article Information
N. Miyazaki, T. Ikeda, K. Ochi

Department of Chemical Engineering, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812, Japan

J. Pressure Vessel Technol 118(4), 480-483 (Nov 01, 1996) (4 pages) doi:10.1115/1.2842217 History: Received August 24, 1995; Revised March 08, 1996; Online February 11, 2008


The finite element method is applied to two-dimensional elastic-plastic analyses for underclad crack problems. The analyses are performed for rectangular specimens with an underclad crack, which are composed of A533B class 1 steel and a clad material, to obtain the fracture mechanics parameter J -integral and the stress distribution ahead of a crack tip. The Q -factor proposed by O’Dowd and Shih is calculated from the stress distribution ahead of a crack tip, and the constraint effect of a crack tip due to a clad material or the effect of a clad material on the fracture toughness of a base material is discussed in terms of the Q -factor. Clad thickness, crack length, and the material property of a clad material are varied to examine their effects.

Copyright © 1996 by The American Society of Mechanical Engineers
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