A methodology is proposed to carry out elastic-plastic fracture analysis of through-wall cracked ductile pipe weldments subjected to pure bending loads. It is based on deformation theory of plasticity, constitutive law characterized by Ramberg-Osgood model, and an equivalence criteria incorporating reduced thickness analogy for simulating system compliance due to the presence of a crack in weld metal. Closed-form solutions are obtained in terms of elementary functions for approximate evaluation of energy release rate and center crack opening displacement. The method utilizes material properties of both base and weld metals which are not considered in the current estimation methods. It is general and can be applied in the complete range between elastic and fully plastic conditions. Numerical examples are presented to illustrate the proposed technique. Comparisons of results with reference solutions from finite element method indicate satisfactory prediction of foregoing fracture parameters.
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November 1992
Research Papers
Elastic-Plastic Fracture of Circumferential Through-Wall Cracked Pipe Welds Subject to Bending
S. Rahman
Engineering Mechanics Department, Battelle, Columbus, OH 43201
F. Brust
Engineering Mechanics Department, Battelle, Columbus, OH 43201
J. Pressure Vessel Technol. Nov 1992, 114(4): 410-416 (7 pages)
Published Online: November 1, 1992
Article history
Received:
April 30, 1992
Revised:
July 28, 1992
Online:
June 17, 2008
Citation
Rahman, S., and Brust, F. (November 1, 1992). "Elastic-Plastic Fracture of Circumferential Through-Wall Cracked Pipe Welds Subject to Bending." ASME. J. Pressure Vessel Technol. November 1992; 114(4): 410–416. https://doi.org/10.1115/1.2929247
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