Mode I and Mode II Transverse Toughness and Crack Propagation characterization of Carbon Nano-Structure Infused High Strength Fiber Composites
by Jones, Justin A., M.S., UNIVERSITY OF MARYLAND, BALTIMORE COUNTY, 2011, 175 pages; 1505295

Abstract:

Carbon Nano-Structures (CNSs) infused in-situ on glass and carbon fiber filament bundles via Chemical Vapor Deposition (CVD) were implemented in attempt to improve the Mode I and Mode II transverse toughness and crack propagation resistance of corresponding unidirectional composite plies. Fractography was performed on failed specimens using optical and electron microscopy. Also, Mode I R-curves were developed to analyze the specimen's resistance to crack extension once a critical crack developed. Lastly, Digital Image Correlation was performed to determine the local displacement field near the crack tip. The glass fiber panels with CNS growth showed a reduction in Mode I transverse toughness and minimal reduction in Mode II transverse toughness compared to panels with no CNS growth. The Carbon Fiber panel showed improvements in transverse toughness for both the Mode I and Mode II loading regime of 21.8 % and 31.8 % respectively.
 
AdviserMarc P. Zupan
SchoolUNIVERSITY OF MARYLAND, BALTIMORE COUNTY
SourceMAI/ 50-04, p. , Feb 2012
Source TypeThesis
SubjectsMechanical engineering; Materials Science
Publication Number1505295
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