Damage analysis of composite pressure vessels using acoustic emission monitoring

Chou, H 2012, Damage analysis of composite pressure vessels using acoustic emission monitoring, Doctor of Philosophy (PhD), Aerospace, Mechanical and Manufacturing Engineering, RMIT University.

Document type: Thesis
Collection: Theses

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Title Damage analysis of composite pressure vessels using acoustic emission monitoring
Author(s) Chou, H
Year 2012
Abstract Composite pressure vessels (CPVs) fabricated using a metal or plastic liner under a composite structural skin are commonly used for natural gas storage on road vehicles. The composite skin, which is usually made of high strength carbon (or glass) fibre-epoxy composite, is the primary structural component of the vessel. In the past decade, accidents due to catastrophic rupture and explosive failure of CPVs have occurred, which is attributed to a lack of knowledge about the damage tolerance and useful life of these vessels. In part, this is because there is no reliable structural health monitoring (SHM) technique for evaluating the structural integrity of the vessels.

The PhD project investigates the feasibility of AE for the SHM of CPVs used on road vehicles.  The PhD project also investigated the suitability of AE to detect damage caused by operational (in-service) factors of CPVs. This includes structural instability analysis, loading scenario analysis, and humidity and temperature effect analysis.  The PhD project numerically analysed the fibre breakage mechanism in unidirectional carbon-epoxy laminates with the consideration of stochastic fibre strength and fibre volume fraction properties, using a finite element approach.  The last part of the PhD project assesses the overall feasibility of AE monitoring for CPVs.  Experimental characterisation of damage in two types of CPVs was performed using acoustic emission.

Degree Doctor of Philosophy (PhD)
Institution RMIT University
School, Department or Centre Aerospace, Mechanical and Manufacturing Engineering
Keyword(s) Composites
Acoustic Emission
Pressure Vessles
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Created: Thu, 11 Oct 2012, 14:41:51 EST by Brett Fenton
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