REVIEW ARTICLE


Residual Strength Improvement of an Aluminium Alloy Cracked Panel



F. Caputo*, G. Lamanna, A. Soprano
School Department of Industrial and Information Engineering, Second University of Naples, via Roma 29 - 81031 Aversa, Italy.


© 2013 Caputo et al

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: (https://creativecommons.org/licenses/by/4.0/legalcode). This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the School Department of Industrial and Information Engineering, Second University of Naples, via Roma 29 - 81031 Aversa, Italy; Tel: +39 081 5010 412 E-mail: francesco.caputo@unina2.it


Abstract

This work deals with the application of the micromechanical Gurson-Tvergaard (GT) model to the determination of the residual strength of analuminumflat stiffened panel (2024 T3) with a central through crack, by means of finite element simulations. The load condition is represented by a monotonic traction along the direction orthogonal to the crack plane. The used Finite Element code is WARP 3D®, which allows simulating ductile damage propagation by considering the GT model.

Numerical results have been compared with experimental ones available in literature. In the second part of the work, a home madeprocedurefounded on the SDI (Stochastic Design Improvement) technique is presented and applied to the improvement of the residual strength properties of the considered panel.

Keywords: Fracture mechanics, Gurson model, R-Curve, SDI.