27 March 2018 Experimental technologies comparison for strain measurement of a composite main landing gear bay specimen
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The development of advanced monitoring system for strain measurements on aeronautical components remain an important target both when related to the optimization of the lead-time and cost for part validation, allowing earlier entry into service, and when related to the implementation of advanced health monitoring systems dedicated to the in-service parameters verification and early stage detection of structural problems. The paper deals with the experimental testing of a composite samples set of the main landing gear bay for a CS-25 category aircraft, realized through an innovative design and production process. The test have represented a good opportunity for direct comparison of different strain measurement techniques: Strain Gauges (SG) and Fibers Bragg Grating (FBG) have been used as well as non-contact techniques, specifically the Digital Image Correlation (DIC) and Infrared (IR) thermography applied where possible in order to highlight possible hot-spot during the tests. The crucial points identification on the specimens has been supported by means of advanced finite element simulations, aimed to assessment of the structural strength and deformation as well as to ensure the best performance and the global safety of the whole experimental campaign.
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Massimo Viscardi, Massimo Viscardi, Maurizio Arena, Maurizio Arena, Monica Ciminello, Monica Ciminello, Michele Guida, Michele Guida, Carosena Meola, Carosena Meola, Pietro Cerreta, Pietro Cerreta, "Experimental technologies comparison for strain measurement of a composite main landing gear bay specimen ", Proc. SPIE 10599, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XII, 105990N (27 March 2018); doi: 10.1117/12.2296420; https://doi.org/10.1117/12.2296420


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