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Record Details

Record 49 of 4767
Unit cell geometry of 3-D braided structures
Author and Affiliation:
Du, Guang-Wu(NASA Langley Research Center, Hampton, VA, United States)
Ko, Frank K.(Drexel Univ., Philadelphia, PA, United States)
Abstract: The traditional approach used in modeling of composites reinforced by three-dimensional (3-D) braids is to assume a simple unit cell geometry of a 3-D braided structure with known fiber volume fraction and orientation. In this article, we first examine 3-D braiding methods in the light of braid structures, followed by the development of geometric models for 3-D braids using a unit cell approach. The unit cell geometry of 3-D braids is identified and the relationship of structural parameters such as yarn orientation angle and fiber volume fraction with the key processing parameters established. The limiting geometry has been computed by establishing the point at which yarns jam against each other. Using this factor makes it possible to identify the complete range of allowable geometric arrangements for 3-D braided preforms. This identified unit cell geometry can be translated to mechanical models which relate the geometrical properties of fabric preforms to the mechanical responses of composite systems.
Publication Date: Jul 01, 1993
Document ID:
19930060480
(Acquired Dec 28, 1995)
Accession Number: 93A44477
Subject Category: MECHANICAL ENGINEERING
Document Type: Journal Article
Publication Information: Journal of Reinforced Plastics and Composites (ISSN 0731-6844); 12; 7; p. 752-768.
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: NASA Langley Research Center; Hampton, VA, United States
Description: 17p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: BRAIDED COMPOSITES; FIBER VOLUME FRACTION; THREE DIMENSIONAL COMPOSITES; CONCENTRATION (COMPOSITION); DYNAMIC MODELS; DYNAMIC RESPONSE; FIBER ORIENTATION
Imprint And Other Notes: Journal of Reinforced Plastics and Composites vol. 12, no. 7 p. 752-768. July 1993
Miscellaneous Notes: Research supported by NASA
Availability Source: Other Sources
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