Dissertation/Thesis Abstract

Degradation of mechanical properties of vinylester and carbon fiber/vinylester composites due to environmental exposure
by Figliolini, Alexander M., M.S., Florida Atlantic University, 2011, 147; 1507530
Abstract (Summary)

An experimental investigation was undertaken to determine the effects of marine environmental exposure on the mechanical properties of vinylester resins (VE510A and VE8084) and carbon fiber/VE510A vinylester composites. The effect of carbon fiber sizing on the composite strengths was also examined. Neat resins were exposed to marine environments until moisture content reached a point of saturation after which they were tested in tension, compression and shear. Compared to the baseline dry specimens, specimens subjected to moisture showed overall increased ductility and a reduction in strength. Dry and moisture saturated composite specimens were tested in tension and compression in different orientations. Longitudinal specimens were tested in in-plane shear and interlaminar shear. Composites with F-sized carbon fibers displayed overall higher strength than those with G-sized fibers at both dry and moisture saturated conditions. An analysis of moisture absorption of the composites was performed which shows that the moisture up-take is dominated by the fiber/matrix region which absorbs up to 90% of the moisture. The composites experienced reduced strength after moisture absorption. The results revealed that the fiber sizing has stronger effect on the fiber/matrix interface dominated strengths than moisture up-take.

Indexing (document details)
Advisor: Carlsson, Leif A.
School: Florida Atlantic University
School Location: United States -- Florida
Source: MAI 50/04M, Masters Abstracts International
Subjects: Naval engineering, Materials science
Publication Number: 1507530
ISBN: 978-1-267-15898-7
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