CUED Publications database

Gradient effects on crack tip mechanics

Martínez-Pañeda, E and Niordson, CF and Deshpande, VS and Fleck, NA (2017) Gradient effects on crack tip mechanics. In: UNSPECIFIED pp. 757-758..

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In this work a general framework for damage and fracture assessment accounting for the role of geometrically necessary dislocations (GNDs) is provided. Crack tip fields are characterized, within both infinitesimal and finite deformation theories, by means of different strain gradient plasticity (SGP) formulations and their finite element implementation. Moreover, the impact of SGP theories on fracture and damage problems is further assessed by modeling crack growth initiation and subsequent resistance. Results show a strong influence of GNDs, revealing the need to incorporate its influence in continuum models in order to adequately characterize behavior at the small scales involved in crack tip deformation.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Divisions: Div C > Materials Engineering
Depositing User: Cron Job
Date Deposited: 05 Jun 2019 20:19
Last Modified: 10 Apr 2021 00:33