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Calculation of Stress Intensity Factor using Displacement Extrapolation Method in Peridynamic Framework

Published online by Cambridge University Press:  17 January 2020

N. Zhu Open the ORCID record for N. Zhu [Opens in a new window]  and
E. Oterkus
N. Zhu*
Affiliation:
Department of Naval Architecture, Ocean and Marine Engineering, University of Strathclyde, Glasgow, UK
E. Oterkus
Affiliation:
Department of Naval Architecture, Ocean and Marine Engineering, University of Strathclyde, Glasgow, UK
*
*Corresponding author (n.zhu@strath.ac.uk)
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Abstract

This paper introduces a new approach to calculate stress intensity factors based on a combination of Displacement Extrapolation Method and Peridynamic Theory. After obtaining the displacement field from Peridynamic Theory, by appropriately selecting nodes at the crack tip region and their displacements yield stress intensity factors at the crack tips. To demonstrate the capability of the proposed approach, three different benchmark problems are considered including plate with a central crack, plate with an edge crack and plate with a slanted crack. Results evaluated from the current approach are compared against analytical and finite element analysis results, and good agreement is obtained between three different approaches. This shows that coupled Displacement Extrapolation Method and Peridynamic Theory approach can be an alternative method to calculate stress intensity factors.

Keywords

Stress Intensity FactorPeridynamicsDisplacement Extrapolation Method.
Type
Research Article
Information
Journal of Mechanics , Volume 36 , Issue 2 , April 2020 , pp. 235 - 243
Copyright
Copyright © 2020 The Society of Theoretical and Applied Mechanics

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