SEDL / STP / STP1244-EB / STP14649S

Application of J-Q Fracture Methodology to the Analysis of Thermal-Shock Experiment TSE-5A

Shum, DKM
Senior Research Engineer, Saint-Gobain/Norton Industrial Ceramics Corporation, Northboro, MA

Pages: 18    Published: Jan 1995

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Abstract

The ORNL thermal-shock experiment TSE-5A is re-analyzed using the J-Q fracture methodology. The objective is to evaluate the hypothesis that potential toughness elevation associated with the shallow-flaw geometry in the TSE-5A cylinder is eliminated by the resence of a tensile axial stress that arises from the nearly equibiaxial nature of thermal-shock loading. Analysis results indicate that Q ≈ 0 for the TSE-5A experiment. Analysis and experimental results together suggest that neither the J-Q trajectory nor the J^c(Q) locus in the regime where Q ≈ 0 have been affected by the thermally-induced transverse load, relative to a situation with the axial stress absent. Therefore, the hypothesis under investigation is not supported by the analysis results and interpretation framework examined in this study.