Fatigue crack growth assessments in welded components including crack closure effects: Experiments and 3-D numerical modeling

Autor(es)

Sarzosa, Diego F. B. ^[1] ; Godefroid, Leonardo B. ^[2] ; Ruggieri, Claudio ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Naval Architecture & Ocean Engn, Sao Paulo - Brazil

^[2] Univ Fed Ouro Preto, Dept Mat Sci & Met, Ouro Preto - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF FATIGUE; v. 47, p. 279-291, FEB 2013.
• Citações Web of Science: 5

Resumo

This work provides a numerical and experimental investigation of fatigue crack growth behavior in steel weldments including crack closure effects and their coupled interaction with weld strength mismatch. A central objective of this study is to extend previously developed frameworks for evaluation of crack closure effects on FCGR to steel weldments while, at the same time, gaining additional understanding of commonly adopted criteria for crack closure loads and their influence on fatigue life of structural welds. Very detailed non-linear finite element analyses using 3-D models of compact tension C(T) fracture specimens with center cracked, square groove welds provide the evolution of crack growth with cyclic stress intensity factor which is required for the estimation of the closure loads. Fatigue crack growth tests conducted on plane-sided, shallow-cracked C(T) specimens provide the necessary data against which crack closure effects on fatigue crack growth behavior can be assessed. Overall, the present investigation provides additional support for estimation procedures of plasticity-induced crack closure loads in fatigue analyses of structural steels and their weldments. (C) 2012 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 08/54130-4 - Avaliacao da fadiga em juntas soldadas circunferenciais de risers rigidos scrs
• Beneficiário: Diego Felipe Sarzosa Burgos
• Linha de fomento: Bolsas no Brasil - Doutorado