Measurement of residual stresses in T-plate weldments

RC Wimpory, PS May, NP O'Dowd, GA Webster, DJ Smith, EJ Kingston

Research output: Contribution to journalArticle (Academic Journal)peer-review

47 Citations (Scopus)

Abstract

Tensile welding residual stresses can, in combination with operating stresses, lead to premature failure of components by fatigue and/or fracture. It is therefore important that welding residual stresses are accounted for in design and assessment of engineering components and structures. In this work residual stress distributions, obtained from measurements on a number of ferritic steel T-plate weldments using the neutron diffraction technique and the deep-hole drilling method, are presented. It has been found that the residual stress distributions for three different plate sizes are of similar shape when distances are normalized by plate thickness. It has also been found that the conservatisms in residual stress profiles recommended in current fracture mechanics-based safety assessment procedures can be significant—of yield strength magnitude in certain cases. Based on the data presented here a new, less-conservative transverse residual stress upper bound distribution is proposed for the T-plate weldment geometry. The extent of the plastic zone developed during the welding process has also been estimated by use of Vickers hardness and neutron diffraction measurements. It has been found that the measured plastic zone sizes are considerably smaller than those predicted by existing methods. The implications of the use of the plastic zone size as an indicator of the residual stress distributions are discussed.
Translated title of the contributionMeasurement of residual stresses in T-plate weldments
Original languageEnglish
Pages (from-to)349 - 365
Number of pages17
JournalJournal of Strain Analysis for Engineering Design
Volume38 (4)
DOIs
Publication statusPublished - Jul 2003

Bibliographical note

Publisher: Professional Engineering Publishing

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