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Crack growth resistance in metallic alloys: the role of isotropic versus kinematic hardening

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Title: Crack growth resistance in metallic alloys: the role of isotropic versus kinematic hardening
Authors: Martinez-Paneda, E
Fleck, NA
Item Type: Journal Article
Abstract: The sensitivity of crack growth resistance to the choice of isotropic or kinematic hardening is investigated. Monotonic mode I crack advance under small scale yielding conditions is modeled via a cohesive zone formulation endowed with a traction–separation law. R-curves are computed for materials that exhibit linear or power law hardening. Kinematic hardening leads to an enhanced crack growth resistance relative to isotropic hardening. Moreover, kinematic hardening requires greater crack extension to achieve the steady-state. These differences are traced to the nonproportional loading of material elements near the crack tip as the crack advances. The sensitivity of the R-curve to the cohesive zone properties and to the level of material strain hardening is explored for both isotropic and kinematic hardening.
Issue Date: 1-Nov-2018
Date of Acceptance: 24-Jun-2018
URI: http://hdl.handle.net/10044/1/73440
DOI: https://dx.doi.org/10.1115/1.4040696
ISSN: 0021-8936
Publisher: ASME
Journal / Book Title: Journal of Applied Mechanics-Transactions of the ASME
Volume: 85
Issue: 11
Copyright Statement: © 2018 ASME
Keywords: Science & Technology
Technology
Mechanics
kinematic hardening
isotropic hardening
cohesive zone modeling
finite element analysis
fracture
ELASTIC-PLASTIC SOLIDS
FRACTURE
SHEETS
Science & Technology
Technology
Mechanics
kinematic hardening
isotropic hardening
cohesive zone modeling
finite element analysis
fracture
ELASTIC-PLASTIC SOLIDS
FRACTURE
SHEETS
Mechanical Engineering & Transports
0901 Aerospace Engineering
0905 Civil Engineering
0913 Mechanical Engineering
Publication Status: Published
Article Number: ARTN 111002
Online Publication Date: 2018-07-17
Appears in Collections:Civil and Environmental Engineering



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