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Correction of plastic zone estimates from linear elastic stress field: a qualitative analysis
Author(s) -
Sousa R. A.,
Figueiredo F. P.
Publication year - 2017
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.12596
Subject(s) - stress field , field (mathematics) , materials science , stress (linguistics) , linear elasticity , structural engineering , forensic engineering , engineering , mathematics , finite element method , philosophy , linguistics , pure mathematics
Abstract This paper shows the usual inconsistency made in the linear elastic fracture mechanic, which is to estimate plastic zones ( pz ) from a linear elastic (LE) analysis with correction of the pz size based on assumptions of equilibrium. The corrected LE pz is compared with the pz obtained from elastic–plastic analyses. For this purpose, the finite element method is used. Moreover, the load histories in points along the domains of the corrected LE pz and elastic–plastic pz are computed and analysed. This paper, showing that LE pz , corrected or not, has only a qualitative interpretation.