In this paper a high-pressure vessel (HPV) is assumed to be wound by a set of macro-scopically orthotropic layers constructed respectively from unidirectional laminae. The formulae for the three-dimensional stress fields in the vessel are established. In the light of the Tsai-Wu failure criterion, the first ply failure internal pressure (FPFP) is calculated. Using this measured FPFP, the vessel strength parameters are identified by Bayesian methods.
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