6533b7d6fe1ef96bd12657ad

RESEARCH PRODUCT

Numerical modelling of low velocity multi-impact test on different stacking sequences

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description

The use of composite materials in the industrial field has been growing significantly for many years. This increase is explained by the fact that the industry, especially aeronautics which was pioneering in this field, is interested in the lightening of structures in order to be able to take up the new environmental challenges. Whether in the aeronautical field or in the land transport sector, structural elements may undergo multi-impactsor impact. Even at low velocitypose a threat to the integrity of the material and the structure itself. The objective of this work is to propose a numerical model to determine the damage within a composite structure subjected to low energy multi-impact. The Chang-Chang damage model predicted matrix breakage, tensile and compressive fibers. The progressive damage of the interface between two plies of the laminate is modeled by a cohesive contact based on a bi-linear law of Benzeggagh-Kenane. The results of the simulation shows the possibility to compare the numerical projected area damage with those obtained experimentally by C-Scan. Similarly, the numerical results obtained in terms of energy-time and displacement force are in good correlation with the experimental results.