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Mechanical Evaluation of Marine Composites

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Mechanical Evaluation of Marine Composites

 

Fiber reinforced polymer composites (FRPCs) are being used extensively for marine applications.  About ninety percent of privately owned boats are being build using FRPCs [1].  A lightweight, low-cost sandwich composite made with wood, polypropylene (Vectra) and Dynel was proposed by naval architect Lindsay Lord [2] for use in high speed planing vessels.  These vessels were designed with a thin wall structure that could flex in response to loading conditions.  Scantling rules devised by naval architect David Gerr [3] indicated that this proposed construction results in a hull that is roughly half the weight of an equivalent design in fiberglass.  The work discussed in this paper is a part of the study that involves the evaluation of different kinds of layups for boats hulls using marine materials such as Dynel (a copolymer of acrylonitrile and vinyl chloride), cedar wood, glass fiber reinforcement and plywood.  Static flexural tests have been conducted on specimens made with cedar wood, plywood, Dynel/epoxy with cedar wood core, and glass fibers/epoxy with plywood core.  The data obtained will be used to determine and compare mechanical properties of these different materials.  The design data collected will also be used to test the fatigue properties of the materials for use in a proposed flexible composite structure of wood and Dynel.  This material will then be compared with a composite structure intended to be rigid.

 

Author: Tanveer Chawla

 

Conference: SAMPE Seattle 2017

 

SKU/Code: SE17--0795

Pages: 14

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