A study on the thermal stress analysis of thick plate structures in post weld heat treatment

Title
A study on the thermal stress analysis of thick plate structures in post weld heat treatment
Author(s)
김재웅김용래
Issue Date
201302
Publisher
KOREAN SOC PRECISION ENG
Citation
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING, v.14, no.2, pp.247 - 252
Abstract
Post weld heat treatment (PWHT) is carried out to improve the capacity of weld structures and to relieve welding residual stress. During the PWHT process, however, a cracking or deformation may occur in a weldment due to the formation of thermal stress and the redistribution of residual stresses. The aim of this study is to analyze the formation of thermal stress during PWHT and then to find the solution which decreases the thermal stress. In regard of the tensile stress, one of the causes of a cracking, the parametric studies are performed in detail through the numerical analysis. Simulations are carried out in the FE software MSC.Marc. PWHT experiments were performed to verify the reliability of the numerical analysis. On the basis of that, the numerical analyses of the thermal stress were carried out for the plate and nozzle shape in many cases such as change of thickness, PWHT temperature history and nozzle shape.
URI
http://hdl.handle.net/YU.REPOSITORY/26441http://dx.doi.org/10.1007/s12541-013-0034-x
ISSN
2234-7593
Appears in Collections:
공과대학 > 기계공학부 > Articles
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