Weld Mechanics - Residual Stress, Material Inhomogeneity and Fracture

焊接力学-残余应力、材料不均匀性和断裂研究者：Yuh J. Chao，chao@sc.edu mailto：chao@sc. edu申办者：南卡罗来纳州赞助项目和研究办公室哥伦比亚，SC 29208摘要焊接件的主要关注点是建立和量化残余应力和材料不均匀性在断裂过程中所起的作用。 研究人员将调查焊接件在制造过程中的力学性能和使用中潜在的断裂事件。理论工作将包括（a）基本断裂力学参数或先进的程序，可以表征含有残余应力和材料不均匀性的固体断裂的发展和（B）焊接，断裂测试样品的制造和断裂力学测试的整个过程的数值模拟。 建模工作将在能源部实验室与实验和冶金研究进行整合、完善和验证。

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.