Residual stress distributions in ferritic steel T-plate weldments have been obtained using the neutron diffraction method. It is shown that the transverse residual stress distribution for two plates of different yield strength are of similar shape and magnitude when normalized appropriately and peak stresses are on the order of the material yield strength. The resultant linear elastic stress intensity factors for these stress distributions have been obtained using the finite element method. It has been shown that the use of the recommended residual stress distributions in UK structural integrity procedures leads to a conservative assessment. The stress intensity factors for the welded T-plate have been shown to be very similar to those obtained using a smooth edge cracked plate subjected to the same local stress field.

Issue Section:
Research Paper
Keywords:
internal stresses, neutron effects, yield strength, elasticity, finite element analysis, welding, crack-edge stress field analysis, steel
Topics:
Stress, Stress concentration, Neutron diffraction, Finite element analysis, Fracture (Materials), Steel
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Copyright © 2004
 by ASME
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