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Mechanical protection for composite structures submitted to low energy impact

Rahmé, Pierre and Bouvet, Christophe and Rivallant, Samuel and Fascio, Valia and Valembois, Guy Mechanical protection for composite structures submitted to low energy impact. (2010) In: ECCM14 - 14th European Conference on Composite Materials, 7 June 2010 - 10 June 2010 (Budapest, Hungary).

(Document in English)

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Composite materials are widely used in aeronautical structures. These materials can be submitted to low energy impacts like tool drop, routine operations… Such impacts can generate damages in the material that significantly reduce the structure strength. A solution to reduce the severity of damages due to impact is to add a mechanical protection on composite structures (patent n° 2 930 478). In this paper, an experimental study on different concepts of protective layers is presented. This protection is made of a certain thickness of low density energy absorbent material (foam, honeycomb or stacking of hollow spheres) and a thin layer of composite laminate (Kevlar). Experimental impact tests with a spherical impactor of 20 mm diameter at low velocity and low energy are made on aluminum plates, with different protections, and for different levels of energy. Analyses of Load/Displacement curves enable to study the capability of each mechanical protection to absorb energy. Resistance of these protections is then compared and discussed, taking into account the thickness and the surface density of the protections.

Item Type:Conference or Workshop Item (Paper)
HAL Id:hal-01852288
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:Other partners > Applications des TEChnologies Avancées - ATECA (FRANCE)
Other partners > Conseil & Technique (FRANCE)
Université de Toulouse > Ecole nationale supérieure des Mines d'Albi-Carmaux - IMT Mines Albi (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:17 Jun 2010 07:13

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