Research Article Open Access

Stiffened Panels Damage Tolerance Determination using an Optimization Procedure based on a Linear Delamination Growth Approach

Aniello Riccio1, Francesco Di Caprio2, Francesco Scaramuzzino1, Andrea Sellitto1 and Mauro Zarrelli3
  • 1 Second University of Naples, Italy
  • 2 Italian Aerospace Research Center (CIRA), Italy
  • 3 National Research Council (CNR), Italy
American Journal of Engineering and Applied Sciences
Volume 9 No. 4, 2016, 1301-1317

DOI: https://doi.org/10.3844/ajeassp.2016.1301.1317

Published On: 31 December 2016

How to Cite: Riccio, A., Caprio, F. D., Scaramuzzino, F., Sellitto, A. & Zarrelli, M. (2016). Stiffened Panels Damage Tolerance Determination using an Optimization Procedure based on a Linear Delamination Growth Approach. American Journal of Engineering and Applied Sciences, 9(4), 1301-1317. https://doi.org/10.3844/ajeassp.2016.1301.1317

Abstract

The damage tolerance of delaminated composite panels under compressive load is usually numerically evaluated by means of computationally expensive non-linear approaches. In this study, an alternative numerical linear approach, able to mimic the delamination propagation initiation, is proposed. With the aim to exploit its benefits, in terms of computational costs reduction, the proposed linear methodology has been used in this study in conjunction with an optimization analysis to assess the damage tolerance of stiffened composite panels with an impact induced delamination under compression. Indeed, the optimization was aimed to find the minimum delamination growth initiation load for a delaminated stiffened panel with variable delamination size and position, providing indications on the damage tolerance capability of the stiffened panel with an arbitrary positioned and sized delamination induced (as an example) by a low energy impact.

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Keywords

  • Delamination
  • Composites
  • Damage Tolerance
  • Linear Approach
  • FEM
  • Optimization