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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

J and CTOD estimation formulas for C(T) fracture specimens including effects of weld strength overmatch

Texto completo
Autor(es):
Savioli, Rafael G. [1] ; Ruggieri, Claudio [1]
Número total de Autores: 2
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Dept Naval Architecture & Ocean Engn, BR-05508900 Sao Paulo - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: INTERNATIONAL JOURNAL OF FRACTURE; v. 179, n. 1-2, p. 109-127, JAN 2013.
Citações Web of Science: 7
Resumo

This work focuses on an evaluation procedure to determine the elastic-plastic J-integral and Crack Tip Opening Displacement (CTOD) fracture toughness based upon the eta-method for C(T) fracture specimens made of homogeneous and welded steels. The primary objective of this investigation is to enlarge on previous developments of J and CTOD estimation procedures for this crack configuration while, at the same time, addressing effects of strength mismatch on the plastic eta-factors. The present analyses enable the introduction of a larger set of factors eta for a wide range of crack sizes (as measured by the a/W-ratio) and material properties, including different levels of weld strength mismatch, applicable to pipeline and pressure vessel steels. Very detailed non-linear finite element analyses for plane-strain and 3-D models of C(T) fracture specimens with centerline-cracked welds provide the evolution of load with increased load-line and crack mouth opening displacement required for the estimation procedure. Overall, the present study, when taken together with previous investigations, provides a fairly extensive body of results to determine parameters J and CTOD for different materials using C(T) specimens with varying overmatch conditions. (AU)

Processo FAPESP: 09/54229-3 - Integridade estrutural em juntas soldadas circunferenciais de dutos e risers
Beneficiário:Claudio Ruggieri
Linha de fomento: Auxílio à Pesquisa - Regular