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[21314] Artykuł:

An alternative formulation of the Ritchie-Knott-Rice local fracture criterion

Czasopismo: Engineering Fracture Mechanics   Tom: 74, Zeszyt: 8, Strony: 1308-1322
ISSN:  0013-7944
Wydawca:  PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Opublikowano: Maj 2007
 
  Autorzy / Redaktorzy / Twórcy
Imię i nazwisko Wydział Katedra Procent
udziału
Liczba
punktów
Andrzej Neimitz orcid logoWMiBMKatedra Podstaw Konstrukcji Maszyn*338.00  
Marcin Graba orcid logoWMiBMKatedra Technologii Mechanicznej i Metrologii*338.00  
Jarosław Gałkiewicz orcid logoWMiBMKatedra Podstaw Konstrukcji Maszyn*338.00  

Grupa MNiSW:  Publikacja w czasopismach wymienionych w wykazie ministra MNiSzW (część A)
Punkty MNiSW: 24
Klasyfikacja Web of Science: Article


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Keywords:

Local approach  In-plane constraint  RKR criterion 



Abstract:

In the paper an alternative formulation of the RKR local fracture criterion is proposed. It is based on the features of the stress distribution in front of a blunted crack in an elastic-plastic material. The stress distribution is computed using the finite strain option in the finite element method. It is postulated that the opening stress in front of the crack should be greater than the critical one, σ c , over the distance l⩾l c , where l c is considered as a material parameter. The hypothesis is applied to estimate the influence of the in-plane constraint on fracture toughness. New formulas to compute the critical value of the J-integral are derived both for the small scale yielding and large plastic deformations in front of the crack. The results obtained are compared with the Sumpter and Forbes experimental results and with the O'Dowd analytical formula concerning the J c =J c (J IC ,Q) relation.



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