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http://dx.doi.org/10.11112/jksmi.2013.17.3.048

Applicability of Hammer-Peening Treatment for Fatigue Life Improvement of Fatigue Damaged Weld Joints  

Kim, In Tae (부산대학교 사회환경시스템공학부)
Park, Min Ho (STX 고성조선해양주식회사)
Cheung, Jin Hwan (부산대학교 사회환경시스템공학부)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.17, no.3, 2013 , pp. 48-55 More about this Journal
Abstract
In this study, fatigue tests were performed on longitudinal out-of-plane gusset fillet welded joints and transverse non-load-carrying cruciform rib fillet welded joints, and then applicability of hammer-peening treatment on improvement of fatigue life for fatigue damaged weld joints were investigated. Fatigue tests were carried out on three types of gusset and rib welded specimens: as-welded specimens, post-weld hammer peened specimens and hammer peened specimens at 50% of as-welded specimen's fatigue life. Before and after hammer peening treatment, the geometry of weld toes and surface stresses near weld toes were measured. As a result of hammer peening treatment, compressive residual stresses of 30-83MPa were introduced near weld toes of the gusset and rib welded joints, and 130% increase in fatigue life and fatigue limit of the welded joints could be realized by hammer peening treatment at 50% fatigue life of as-welded conditions.
Keywords
Gusset; Rib; Fillet welded joint; Compressive residual stress; Hammer peening treatment; Improving fatigue life;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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