Sandwich construction for ship superstructure: cost estimation and failure prediction

Yu, Peng (2016) Sandwich construction for ship superstructure: cost estimation and failure prediction. Masters thesis, Memorial University of Newfoundland.

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Abstract

The thesis emphasizes on the theoretical and numerical investigations of sandwich structures, especially the web-core sandwich structure. A mathematical model is applied to estimate the manufacturing cost of a glass-fiber reinforced plastic web-core sandwich hatch cover panel using the vacuum assisted resin transfer molding. The advantages of the composite hatch cover panel compared to the convention steel one are illustrated. The buckling of web-core sandwich structure is studied to reveal the effects of webs and core material on the critical buckling loads. The variational iteration method is used and approved to be efficient and accurate as an approximate method. The finite element analysis simulation using Abaqus is conducted to facilitate the research of sandwich wrinkling phenomenon. The sandwich structures with both Aluminum and composites face-sheets are covered in the finite element analysis simulations. The effects of boundary conditions and element types are demonstrated. The finite element analysis results are compared with that of both analytical models and testings, and the disparities are explained.

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