| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Roche, Jean-Michel
Office National d'Études et de Recherches Aérospatiales
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 displayed)
- 2024Investigating the sensitivity of fiber bragg grating to process-induced gap in thermoplastic composite laminates
- 2024Investigating the Sensitivity of Fiber Bragg Grating to a Process Induced Gap during Vacuum Bag Consolidation in Thermoplastic Composite Laminates
- 2023Investigation of the thermal cycling durability of cobonded piezoelectric sensors for the shm of reusable launch vehicles
- 2023In-situ monitoring of consolidation process for high-performance thermoplastic composites by Fibre Bragg Grating
- 2023In-situ monitoring of consolidation process for high-performance thermoplastic composites by Fibre Bragg Grating ; Suivi in-situ du processus de consolidation de composite thermoplastique hautes performances par fibre à réseau de Bragg
- 2023Thermal Cycling Durability of Bonded PZT Transducers Used for the SHM of Reusable Launch Vehiclescitations
- 2023Assesment of different additive manufacturing routes for repair: comparison of liquid-phase and solid-state material deposition processes ; Evaluation de différentes voies de fabrication additive pour la réparation : comparaison des procédés de dépôt de matériaux en phase liquide et a l'état solide
- 2022Contribution of IR thermography to assess lightning-strike impact resistance of carbon fiber composite materials
- 2022Contribution of IR thermography to assess lightning-strike impact resistance of carbon fiber composite materials ; Apport de la thermographie IR pour estimer la tenue des matériaux composites fibres de carbone à l'impact foudre
- 2021Investigation of self-heating and damage progression in woven carbon fibre composite materials, following the fibres direction, under static and cyclic loading ; Auto-échauffement et suivi d’endommagement de composites fibres de carbone sous sollicitations quasi-statiques et cycliques, dans le sens fibrescitations
- 2020Use of laser spot thermography for the non-destructive imaging of thermal fatigue microcracking of a coated ceramic matrix compositecitations
- 2018Lock-in thermography as a tool for fatigue damage monitoring of composite structurescitations
- 2018Accelerated estimation of fatigue performances of thermoplastic composite material by self-heating monitoring
- 2018Experimental monitoring of the self-heating properties of thermoplastic composite materials during tensile and cyclic tests
- 2017Frequency indentation: towards Non Destructive Test of structures
- 2016Non-destructive inspection of initial defects of PA6.6-GF50/aluminum self-piercing riveted joints and damage monitoring under mechanical static loadingcitations
- 2016Non-destructive inspection of initial defects of PA6.6-GF50/aluminum self-piercing riveted joints and damage monitoring under mechanical static loading ; Inspection non-destructive de défauts initiaux d'assemblages PA6.6-GF50/aluminium par rivetage auto-poinçonneur et suivi d'endommagements durant des essais mécaniques statiquescitations
Places of action
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article
Frequency indentation: towards Non Destructive Test of structures
Abstract
Nanoindentation is commonly used to determine local mechanical properties of materials. The material is tested with a load which is quasi-statically applied by an indenter, on the surface to be characterized. From the load/displacement curve, classic analytical models enable to determine Young modulus on every performing test point [Oliver & Pharr, AIP Conference proceedings 7 (1992) 1564-1583; Doerner & Nix, J. Mater. Res. 1 (1986) 601-609; Loubet et al., Vickers indentation curves of elastoplastic materials, in American Society for Testing and Materials STP 889, Microindentation Techniques in Materials Science and Engineering, Blau & Lawn eds, 1986, pp. 72-89]. This test is appropriate only for small surface of materials (<1 cm2) which has to be well polished and planned to have the best measurements but is not suitable for structural parts like sheet metal or composite sandwich (>1000 cm2). Through extension of the CSM (Continuous Stiffness Measurement) method [Asif et al., Rev. Sci. Instrum. 70 (1999) 2408-2413], the indenter can also be used as vibrations generator. It is positioned on a piezoelectric stack and is applied on the surface to analyze with a contact load of 1000 mN. It is then submitted to an oscillating frequency of 5 kHz under 10 Volts. Generated Lamb waves are received by a Laser vibrometer which is able to scan the material surface and to localize the impact damage of the structure [Boro Djordjevic, Quantitative ultrasonic guided wave testing of composites, The 39th Annual Review of Progress, 2013]. The indenter can also be used as the receiver of the generated wave. Receiver indenters are positioned in several locations in the structure to allow the measurement of time of flights between the emitting indenter and the receiver ones. The measurement of the distances between the emission point and the different reception points is required to measure the wave velocities and ultimately characterize the anisotropy of the metal sheet. Further studies could even lead to the assessment of the elastic properties.