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Crack initiation and propagation in ductile specimens with notches: experimental and numerical study

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journal contribution
posted on 16.11.2015, 11:53 by Alessandro Schiavone, Gayan A. Abeygunawardane-Arachchige, Vadim SilberschmidtVadim Silberschmidt
© 2015 Springer-Verlag Wien Failures of components and structures are often related to the presence of notches of different shapes. Damage modelling techniques have been proven capable of modelling the crack initiation and propagation in ductile materials (such as Al alloys). The Gurson–Tvergaard–Needleman (GTN) method and extended finite-element method (XFEM) are compared against original experiments to study the crack initiation and propagation processes in aluminium specimens with different notch shapes (V-shape, U-shape and square). Two regimes are considered in this study: quasi-static and impact uniaxial tensile loading. Results show that the load-bearing capability predicted with the two methods is somewhat lower compared to experiments; still, the crack shapes were predicted correctly, with the exception of the square-notch case, for which XFEM was unable to predict the correct shape due to limitations in the model formulation. This study provides information useful for the design of components with stress raisers that are exposed to different loading regimes and shows limitations in both the GTN- and XFEM-based approaches that in many cases underestimate the load-bearing capacity.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Acta Mechanica

Volume

227

Issue

1

Pages

203-215

Citation

SCHIAVONE, A., ABEYGUNAWARDANE-ARACHCHIGE, G. and SILBERSCHMIDT, V.V., 2016. Crack initiation and propagation in ductile specimens with notches: experimental and numerical study. Acta Mechanica, 227(1), pp.203-215.

Publisher

© Springer-Verlag Wien

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2015-07-17

Copyright date

2016

Notes

The final publication is available at Springer via http://dx.doi.org/10.1007/s00707-015-1425-0

ISSN

0001-5970

Language

en