Paper number 229
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3D DAMAGE ANALYSIS APPLIED TO LOW-ENERGY IMPACTS ON COMPOSITE LAMINATES |
O. Allix1 , D. Guédra-Degeorges2 , S. Guinard1 , A. Vinet2
1LMT (ENS CACHAN) 61 Avenue du Président Wilson, 94 235 CACHAN CEDEX
2Centre de Recherches de Suresnes (AEROSPATIALE) 12 Rue Pasteur, 92 152 SURESNES.
| Summary | Low-velocity impacts on carbon-epoxy laminates result in local damage; the integrity of aircraft structures when subjected to these impacts is currently assessed via experi-mental analysis. This study aims at numerically simulating the damage appearance in order to calculate the post-impact remaining load-carrying capabilities of impacted structures. Therefore, a mechanical and numerical modelling of the damage occuring in laminates, previously defined at LMT [1] [8], is updated to this specific type of loading. A rich experimental data base on laboratory specimens enables thorough comparisons between model simulations and experimental results. Preliminary results show good correlation with qualitative experimental characterization and emphasizes a high sensibility of the results towards calculation accuracy. |
Keywords | low-velocity impact, carbon-epoxy laminated composites, damage mechan-ics, delamination. |