Acoustic emission analysis of composite pressure vessels under constant and cyclic pressure |
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| Affiliation: | 1. Sir Lawrence Wackett Aerospace Research Centre, School of Aerospace, Mechanical & Manufacturing Engineering, RMIT University, Melbourne, Victoria 3001, Australia;2. Cooperative Research Centre for Advanced Composite Structures (CRC-ACS), Fishermans Bend, Victoria 3207, Australia;3. Mines ParisTech, Centre des Matériaux, CNRS UMR 7633, BP 87, 91003 Evry cedex, France;1. Bhabha Atomic Research Centre, Mumbai 400085, India;2. Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, India;1. College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China;2. Department of Civil and Environmental Engineering and Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208, USA;3. School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China;1. Department Physics and Mechanics of Materials, Institute Pprime (UPR 3346), CNRS, ENSMA, Université de Poitiers, BP40109, F-86961 Futuroscope Chasseneuil Cedex, France;2. CEA, DAM, Le Ripault, F-37260 Monts, France;1. Department Physics and Mechanics of Materials, Institute Pprime (UPR 3346), CNRS, ENSMA, Université de Poitiers, BP40109, F-86961 Futuroscope Chasseneuil Cedex, France;2. CEA, DAM, Le Ripault, F-37260 Monts, France;1. Department of Mech. Eng. and Systems, Doshisha University, Kyotonabe-City, Kyoto 610-0394, Japan;2. Department ABC, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy;3. DIC Polymers group, 1-3 Takasago, Takaishi City, Osaka 592-0001, Japan |
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| Abstract: | The use of acoustic emission (AE) for the detection of damage in carbon fibre composite pressure vessels was evaluated for constant and cyclic internal gas pressure loading conditions. AE was capable of monitoring the initiation and accumulation of damage events in a composite pressure vessel (CPVs), although it was not possible to reliably distinguish carbon fibre breakage from other microscopic damage events (e.g. matrix cracks, fibre/matrix interfacial cracks). AE tests performed on the carbon fibre laminate used as the skin of pressure vessels revealed that the development of damage is highly variable under constant pressure, with large differences in the rupture life and acoustic emission events at final failure. Numerical analysis of the skin laminate under constant tensile stress revealed that the high variability in the stress rupture life is due mainly to the stochastic behaviour of the carbon fibre rupture process. |
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| Keywords: | A Polymer-matrix composites (PMCs) C Finite element analysis (FEA) D Acoustic emission |
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