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RESEARCH PAPERS

Formation of Microscopic Voids in Resin Transfer Molded Composites

[+] Author and Article Information
Youssef K. Hamidi, Levent Aktas, M. Cengiz Altan

School of Aerospace and Mechanical Engineering, University of Oklahoma, Norman, OK 73019

J. Eng. Mater. Technol 126(4), 420-426 (Nov 09, 2004) (7 pages) doi:10.1115/1.1789958 History: Received July 25, 2003; Revised February 15, 2004; Online November 09, 2004
Copyright © 2004 by ASME
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References

Figures

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Experimental molding apparatus used to fabricate composite disks
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Representative microscopic images obtained at 200× magnifications depicting examples of voids from different zones: (a) typical composite cross section with different fiber orientations; (b) two matrix voids; (c) five preform voids; (d) one transition void
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Void content contributions of different locations (void zones) within the composite disk
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Variation in void content through-the-thickness of the composite disk
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Void size distributions based on equivalent diameter at the surface (next to mold walls) and inner layers
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Representative microscopic images obtained at 200× magnifications depicting voids with different sizes: (a) example of a large void adjacent to a fiber bundle; (b) two small and a barely medium void (from top to bottom); (c) a medium void; (d) voids from different size categories
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Size distributions of voids from different locations (void zones) within the composite disk
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Void content contributions of voids with different shapes
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Size distribution of voids with different shapes

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