Results 291 to 300 of about 9,105 (323)
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Fatigue Crack Growth at Notches Considering Plasticity Induced Closure
2008Classical fatigue analyses discriminate between technical crack initiation (crack length of about 1mm) and crack propagation stages. The stage of crack initiation, however, is itself dominated by the growth of short fatigue cracks. Based on the assumption that a fatigue life to initiate a microstructurally short crack of dimensions in the order of 10µm
Jutta Bruening +3 more
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On crack tip shielding due to plasticity‐induced closure during an overload
Fatigue & Fracture of Engineering Materials & Structures, 2010ABSTRACTThe mechanisms underlying the plasticity‐induced shielding of a crack tip during fatigue are investigated at both constant amplitude loading and in a case with a substantial single‐cycle overload. A recently developed mathematical model of the stress field around the crack was fitted to maps of isochromatic fringe data obtained from phase ...
COLOMBO, CHIARA +4 more
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International Journal of Fatigue, 2015
Abstract The effects of plane strain plasticity induced crack closure on fatigue cracks located at the interface of dissimilar steel materials are presented using finite element modelling. Based on the study, it has been observed that bimaterial cracks produced unsymmetrical residual plastic strains and crack profiles in the crack wakes.
Konjengbam Darunkumar Singh +1 more
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Abstract The effects of plane strain plasticity induced crack closure on fatigue cracks located at the interface of dissimilar steel materials are presented using finite element modelling. Based on the study, it has been observed that bimaterial cracks produced unsymmetrical residual plastic strains and crack profiles in the crack wakes.
Konjengbam Darunkumar Singh +1 more
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Engineering Fracture Mechanics, 2016
Abstract The plasticity-induced crack closure of through-thickness cracks, in CT specimens of 304L austenitic stainless steel, is numerically simulated using finite elements. Crack propagation is achieved through node releasing, by applying constant Δ K amplitude, so as to limit the loading history influence.
Gardin, Catherine +3 more
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Abstract The plasticity-induced crack closure of through-thickness cracks, in CT specimens of 304L austenitic stainless steel, is numerically simulated using finite elements. Crack propagation is achieved through node releasing, by applying constant Δ K amplitude, so as to limit the loading history influence.
Gardin, Catherine +3 more
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Engineering Fracture Mechanics, 2004
Abstract This paper reports the results of a fairly detailed finite element study which modelled the plasticity-induced crack closure (PICC) behaviour of interfacial cracks in various bi-material specimens. In particular, the fatigue crack-opening stress ( S op ) level and the crack-tip deformation fields (Modes I and II) have been assessed for a ...
L.-W Wei, M.N James
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Abstract This paper reports the results of a fairly detailed finite element study which modelled the plasticity-induced crack closure (PICC) behaviour of interfacial cracks in various bi-material specimens. In particular, the fatigue crack-opening stress ( S op ) level and the crack-tip deformation fields (Modes I and II) have been assessed for a ...
L.-W Wei, M.N James
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A BOUNDARY ELEMENT MODEL OF PLASTICITY‐INDUCED FATIGUE CRACK CLOSURE
Fatigue & Fracture of Engineering Materials & Structures, 1998This paper describes a plane stress boundary element model of plasticity‐induced fatigue crack closure. A simple Dugdale‐type strip yield zone is used and quadratic programming techniques are employed to establish crack shape, stress and plastic deformation.
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An Analytical Investigation of Plasticity Induced Closure Involving Short Cracks
1988Plasticity induced crack closure and its effect on the fatigue growth of short cracks is investigated numerically. A plane stress finite-element analysis is used to simulate a nonpropagating crack of length 65 μm in a single-edge-cracked specimen under two stress levels and two values of stress ratio R.
T Nicholas, AN Palazotto, E Bednarz
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Dislocation-based model of plasticity and roughness-induced crack closure
International Journal of Fatigue, 2013Abstract Along with external forces and the macro-geometry of cracked bodies, the local stress intensity factors Δk and kmax at fatigue crack fronts are also determined by internal stress fields and the crack front microgeometry (extrinsic shielding).
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Advancing pressure-sensitive adhesives for internal wound closure
Nature Reviews Materials, 2022Danielle Fitzgerald, Mark Grinstaff
exaly