How to define a mechanical impact equivalent to a lightning strike
| Autor: | Frederic Lachaud, Ivan Revel, Christine Espinosa, F. Soulas, J. Duval, Bruno Lepetit, Stéphane Guinard |
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| Přispěvatelé: | Institut Clément Ader (ICA), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT) |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Materials science
business.industry Delamination 02 engineering and technology Structural engineering Sense (electronics) 021001 nanoscience & nanotechnology Lightning Magnetic field [PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph] Lightning strike Transverse plane 020303 mechanical engineering & transports 0203 mechanical engineering Fuselage Deflection (engineering) 0210 nano-technology business |
| Zdroj: | 2015 International Conference on Lightning and Static Electricity (ICOLSE) 2015 International Conference on Lightning and Static Electricity (ICOLSE), 2015, Toulouse, France |
| Popis: | International audience; Lightning strikes on thin monolithic composite materials such as aircraft fuselage skin induce two distinct kinds of direct effects: surface and bulk mechanical damage. Bulk damage includes fibre-resin debonding, transverse cracks, fibre rupture and ply delamination which are caused by mechanical stresses resulting from physical processes induced by lightning strikes such as surface explosion or magnetic force generation. We propose here a method to design mechanical impact tests wanted to be representative of lightning ones in the sense that strains and stresses applied to the material in both situations are comparable. The criterion of equivalence we rely on is thus the temporal evolution of the rear face deflection. Mechanical impact tests leading to deflections quite similar to the ones obtained during lightning tests have been designed using a simulation driven procedure and performed experimentally. A comparison between these two kinds of tests is then achieved, based on the two observables: rear face deflection for which we have a quite good matching for the first 100 µs and internal damage (delamination area and profile) for which we obtain an acceptable matching for the total delaminated area but very poor matching for the distribution of the delamination in the laminate. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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