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Titolo:
THE EFFECT OF WELD GEOMETRY AND RESIDUAL-STRESSES ON THE FATIGUE OF WELDED-JOINTS UNDER COMBINED LOADING
Autore:
NGUYEN TN; WAHAB MA;
Indirizzi:
UNIV ADELAIDE,DEPT ENGN MECH ADELAIDE SA 5005 AUSTRALIA
Titolo Testata:
Journal of materials processing technology
fascicolo: 1-3, volume: 77, anno: 1998,
pagine: 201 - 208
SICI:
0924-0136(1998)77:1-3<201:TEOWGA>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Keywords:
COMBINED LOADING; FATIGUE STRENGTH; RESIDUAL STRESSES; WELDED JOINTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
17
Recensione:
Indirizzi per estratti:
Citazione:
T.N. Nguyen e M.A. Wahab, "THE EFFECT OF WELD GEOMETRY AND RESIDUAL-STRESSES ON THE FATIGUE OF WELDED-JOINTS UNDER COMBINED LOADING", Journal of materials processing technology, 77(1-3), 1998, pp. 201-208

Abstract

A mathematical model is developed to predict the overall effect of the influencing weld geometry parameters such as (e.g. weld toe radius, weld toe undercut, flank angle, plate thickness, misalignment) and residual stresses on the fatigue strength and fatigue life of butt-weldedjoints subjected to combined loading (tensile and bending). The concepts of linear elastic fracture mechanics (LEFM), finite element analysis (FEA), dimensional analysis technique (DAT) and superposition approaches have been used for the modelling. It has been found that the co-influence effect of weld toe-undercut with other butt-weld geometry parameters is very significant. The reduction of fatigue life and fatigue strength, in comparison to that of flush-ground welded plate, causedby the introduction of a weld toe undercut is twice that for a weldedjoint without an undercut. The combined loading condition resulting from misalignment can significantly reduce the fatigue life and fatiguestrength of butt joints by 10-60% subject to misalignment levels of 5-50% (ratio of axial eccentricity to plate thickness of 0.05-0.5), respectively. The effects of both compressive and tensile residual stresses are incorporated successful in the model. The mathematical model issatisfactorily verified by experimental data. (C) 1998 Published by Elsevier Science S.A. All rights reserved.

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Documento generato il 25/11/20 alle ore 09:38:58