Crack growth resistance in metallic alloys: the role of isotropic versus kinematic hardening
File(s)
Accepted version
Author(s)
Martinez-Paneda, Emilio
Fleck, Norman A
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.
Date Issued
2018-11-01
Date Acceptance
2018-06-24
Citation
Journal of Applied Mechanics-Transactions of the ASME, 2018, 85 (11)
ISSN
0021-8936
Publisher
ASME
Journal / Book Title
Journal of Applied Mechanics-Transactions of the ASME
Volume
85
Issue
11
Copyright Statement
© 2018 ASME
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000447279400002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Technology
Mechanics
kinematic hardening
isotropic hardening
cohesive zone modeling
finite element analysis
fracture
ELASTIC-PLASTIC SOLIDS
FRACTURE
SHEETS
Publication Status
Published
Article Number
ARTN 111002
Date Publish Online
2018-07-17