Assessment of gravelling impact phenomenon on helicopter glass windshields

Abstract : Glasses can be subjected to various kinds of impacts on duty, which may alter their mechanical properties. In the specific case of helicopter windshields, this phenomenon is called gravelling: ground particles around the rotorcraft take off due to the local air flow and impact the windshields, creating characteristic damage patterns and in some cases even leading to in-service windshields cracks, which turn out to be critical because the windshield then often needs to be replaced. Consequently, a new gravelling test protocol needs to be developed, since the current FOD (Foreign Object Damage) impact resistance specifications are not representative enough.
Type de document :
Communication dans un congrès
42nd European Rotorcraft Forum 2016, Sep 2016, Lille, France
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-01618791
Contributeur : Laurent Jonchère <>
Soumis le : mercredi 18 octobre 2017 - 15:01:36
Dernière modification le : mercredi 16 mai 2018 - 11:23:26

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  • HAL Id : hal-01618791, version 1

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G. Langevin, A. Perret, J.-C. Sangleboeuf, U. Eberth. Assessment of gravelling impact phenomenon on helicopter glass windshields. 42nd European Rotorcraft Forum 2016, Sep 2016, Lille, France. 〈hal-01618791〉

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