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In‐plane and out‐of‐plane constraint parameters along a three‐dimensional crack‐front stress field under creep loading
Author(s) -
MATVIENKO Y. G.,
SHLYANNIKOV V. N.,
BOYCHENKO N. V.
Publication year - 2013
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/j.1460-2695.2012.01722.x
Subject(s) - materials science , stress intensity factor , creep , stress field , plane stress , crack tip opening displacement , structural engineering , plane (geometry) , mechanics , tension (geology) , hardening (computing) , stress (linguistics) , finite element method , geometry , composite material , fracture mechanics , ultimate tensile strength , mathematics , physics , engineering , layer (electronics) , linguistics , philosophy
Full‐field three‐dimensional (3D) numerical analyses was performed to determine in‐plane and out‐of‐plane constraint effect on crack‐front stress fields under creep conditions of finite thickness boundary layer models and different specimen geometries. Several parameters are used to characterize constraint effects including the non‐singular T ‐stresses, the local triaxiality parameter, the T z ‐factor of the stress‐state in a 3D cracked body and the second‐order‐term amplitude factor. The constraint parameters are determined for centre‐cracked plate, three‐point bend specimen and compact tension specimen. Discrepancies in constraint parameter distribution on the line of crack extension and along crack front depending on the thickness of the specimens have been observed under different loading conditions of creeping power law hardening material for various configurations of specimens.