Crack growth resistance in metallic alloys: The role of isotropic versus kinematic hardening
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Publication Date
2018-11-01Journal Title
Journal of Applied Mechanics, Transactions ASME
ISSN
0021-8936
Volume
85
Issue
11
Type
Article
Metadata
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Martínez-Pañeda, E., & Fleck, N. (2018). Crack growth resistance in metallic alloys: The role of isotropic versus kinematic hardening. Journal of Applied Mechanics, Transactions ASME, 85 (11)https://doi.org/10.1115/1.4040696
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 modelled 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 non-proportional 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.
Identifiers
External DOI: https://doi.org/10.1115/1.4040696
This record's URL: https://www.repository.cam.ac.uk/handle/1810/279615
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