Weld Mechanics - Residual Stress, Material Inhomogeneity and Fracture

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Weld Mechanics - Residual Stress, Material Inhomogeneity and FractureInvestigator: Yuh J. Chao, chao@sc.edu mailto:chao@sc.eduSponsor: University of South Carolina Office of Sponsored Programs and ResearchColumbia, SC 29208ABSTRACTA major concern with weldments is to establish and quantify the role played by residual stress and material inhomogeneity in the fracture process. The researcher will investigate the mechanics of weldments in both the fabrication process and the potential fracture events in service. The theoretical work will include (a) the development of fundamental fracture mechanics parameters or advanced procedures that can characterize the fracture of solids containing residual stress and material inhomogeneity and (b) the numerical modeling of the entire process of welding, fabrication of fracture testing samples, and fracture mechanics testing. The modeling work will be integrated, refined and validated with experimental and metallurgical studies at DOE laboratories.