Prediction and control of residual stresses and distortion in HY-130 thick pipe weldments
Loading...
Authors
Mabry, John Paul
Subjects
Naval Engineering
Welding
Thermal stress
HY-130 steel
Welding
Thermal stress
HY-130 steel
Advisors
Masubuchi, Koichi
Date of Issue
1979-05
Date
May 1979
Publisher
Cambridge, Massachusetts; Massachusetts Institute of Technology
Language
en_US
Abstract
In order to validate existing techniques for computer simulation of the welding process, an experiment is designed and carried out in which seam and girth weld are produced on a high strength steel cylinder. Fabrication of the HY-130 cylinder, selection of welding parameters for the seam and girth welds, and the selection and arrangement of instrumentation are described. The theoretical background of finite element computer simulation of heat flow in weldments as well as techniques for axisymmetric finite element analysis of thermal stress and metal movement during welding are discussed. Finite element representation of weldment geometry for heat flow and stress analysis is presented. Metallurgical properties of the HY-130 cylinder seam weld are presented in the form of photo-micrographs and electron scan micrographs.
Temperature, strain, and radial distortion are measured at various locations or the HY-130 cylinder and the measured values are compared in tabular and graphic form with those values predicted by use of the heat flow and stress analysis programs. Excellent agreement is achieved between measured and analytically predicted temperature distributions, but only qualitative agreement is shown for strains and radial distortion.
Type
Thesis
Description
Series/Report No
Department
Ocean Engineering
Organization
Massachusetts Institute of Technology
Identifiers
NPS Report Number
Sponsors
Funder
Format
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.