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Shakedown behaviour of composite cylinders with cross holes

Chen, Haofeng and Chen, Weihang and Li, Tianbai and Ure, James Michael (2010) Shakedown behaviour of composite cylinders with cross holes. In: Proceedings of the ASME Pressure Vessels and Piping Conference 2010, 2010-07-18 - 2010-07-22.

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In this study, both the lower and upper bound shakedown limits of a closed-end composite cylinder with or without a cross hole subject to constant internal pressure and a cyclic thermal gradient are calculated by the Linear Matching Method (LMM). Convergence for upper and lower bound shakedown limit of the composite cylinders is sought and shakedown limit interaction diagrams of the numerical examples identifying the regions of reverse plastic limit and ratchet limit are presented. The effects of temperature-dependent yield stress, materials discontinuities, composite cylinder thickness and the existence of cross hole on the shakedown limits are discussed for different geometry parameters. Finally, a safety shakedown envelope is created by formulating the shakedown limit results of different composite material and cylinder thickness ratios with different cross hole sizes.