Reduction of residual stresses and distortion in girth welded pipes
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Authors
Barnes, Pamela Kay
Subjects
Advisors
Masubuchi, K.
Date of Issue
1987-06
Date
June 1987
Publisher
Massachusetts Institute of Technology
Language
en_US
Abstract
Conventionally, welding control has been used to assure that the quality of the weld itself is maintained. Residual stresses and distortion result from the non-uniform temperature distribution which form the weld process. In this thesis, an investigation into the reduction of residual stresses and distortion is performed. Potential benefits of reducing these include prevention of stress corrosion cracking, fatigue, brittle fracture and collapse strength. In an attempt to reduce residual stresses and distortion, a hydraulic restraining device was designed, constructed and tested. It was then compared to several other methods being investigated. This hydraulic restraining device is very effective in reducing the radial contraction. Although it also reduces the residual stresses, it does not change them from tensile to compressive as some of the other methods do.
Type
Thesis
Description
Series/Report No
Department
Ocean Engineering
Organization
Massachusetts Institute of Technology
Identifiers
NPS Report Number
Sponsors
Funding
Format
114 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.