Imperial College London
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DrEmilioMartinez-Paneda

Faculty of Engineering, Department of Civil and Environmental Engineering

Visiting Reader
 
 
 
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Contact

 

+44 (0)20 7594 8188e.martinez-paneda Website

 
 
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Location

 

249Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Martinez-Paneda:2019:10.1016/j.jmps.2019.02.011,
author = {Martinez-Paneda, E and Deshpande, VS and Niordson, CF and Fleck, NA},
doi = {10.1016/j.jmps.2019.02.011},
journal = {Journal of the Mechanics and Physics of Solids},
pages = {136--150},
title = {The role of plastic strain gradients in the crack growth resistance of metals},
url = {http://dx.doi.org/10.1016/j.jmps.2019.02.011},
volume = {126},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Crack advance from short or long pre-cracks is predicted by the progressive failure of a cohesive zone in a strain gradient, elasto-plastic solid. The presence of strain gradients leads to the existence of an elastic zone at the tip of a stationary crack, for both the long crack and the short crack cases. This is in sharp contrast with previous asymptotic analyses of gradient solids, where elastic strains were neglected. The presence of an elastic singularity at the crack tip generates stresses which are sufficiently high to activate quasi-cleavage. For the long crack case, crack growth resistance curves are predicted for a wide range of ratios of cohesive zone strength to yield strength. Remarkably, this feature of an elastic singularity is preserved for short cracks, leading to a severe reduction in tensile ductility. In qualitative terms, these predictions resemble those of discrete dislocation calculations, including the concept of a dislocation-free zone at the crack tip.
AU  - Martinez-Paneda,E
AU  - Deshpande,VS
AU  - Niordson,CF
AU  - Fleck,NA
DO  - 10.1016/j.jmps.2019.02.011
EP  - 150
PY  - 2019///
SN  - 0022-5096
SP  - 136
TI  - The role of plastic strain gradients in the crack growth resistance of metals
T2  - Journal of the Mechanics and Physics of Solids
UR  - http://dx.doi.org/10.1016/j.jmps.2019.02.011
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000464090900008&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/73430
VL  - 126
ER  -
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