A numerical study of crack shielding and deflection under extensive plasticity


Burke-Veliz, Allan, Reed, Philippa A.S. and Syngellakis, Stavros (2009) A numerical study of crack shielding and deflection under extensive plasticity. Engineering Fracture Mechanics, 76, (9), 1345-1356. (doi:10.1016/j.engfracmech.2009.02.003).

Download

[img] PDF - Pre print
Download (559Kb)

Description/Abstract

Experimentally observed crack deflection events in multi-layered material systems, occurring even under pure mode-I loading, are here simulated and explained through elasto-plastic finite element modelling. The crack tip opening displacement is adopted as the
crack driving force and estimated along crack paths whose deflection is predicted using the maximum tangential strain criterion. Shielding conditions that promote deflection and bifurcation are evaluated. It is shown that, under conditions of extended plasticity, CTOD evolution as a crack approaches an interface can reveal crack shielding and amplification, and that crack deflection and growth can be assessed from the variation of tangential strains around the crack tip.

Item Type: Article
ISSNs: 0013-7944 (print)
Related URLs:
Keywords: multi-layered systems, crack deflection, crack path bifurcation, crack growth, plasticity, finite element analysis
Subjects: T Technology > TJ Mechanical engineering and machinery
Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
University Structure - Pre August 2011 > School of Engineering Sciences > Computational Engineering and Design
ePrint ID: 66387
Date Deposited: 10 Jun 2009
Last Modified: 27 Mar 2014 18:47
Contact Email Address: ss@soton.ac.uk
URI: http://eprints.soton.ac.uk/id/eprint/66387

Actions (login required)

View Item View Item