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Title: Interlocked fabric and laminated fabric Kevlar 49/epoxy composites

The mechanical behavior of a novel interlocked fabric reinforced Kevlar 49/epoxy composite has been measured and compared to those of a laminated Kevlar 49 fabric composite (which served as a reference material). Both composites were 5.0 mm thick, contained the same 50% in-plane fiber volume fraction and were fabricated in a similar manner using the same Dow DER 332 epoxy, Jeffamine T403-hardened resin system. The reference material (Material 1) was reinforced with seven plies of Dupont style 1033 Kevlar 49 fabric. A photomicrograph of a section polished parallel to one of the fiber directions is shown. The interlocked fabric was designed and woven for Sandia National Laboratories by Albany International Research Co., Dedham, MA. The main design criterion was to duplicate a sewn through-the-thickness fabric used in preliminary studies. The interlocked fabric composite (Material 2) contains roughly 4% by volume of through-the-thickness fiber reinforcement for the purpose of improving interlaminar strength. A photomicrograph of a section showing the warp-aligned binder yarns interlocking the six fabric plies together is shown. 2 refs., 8 figs.
Authors:
;
Publication Date:
OSTI Identifier:
6774753
Report Number(s):
SAND-88-2579C; CONF-8810151-4
ON: DE89000459
DOE Contract Number:
AC04-76DP00789
Resource Type:
Conference
Resource Relation:
Conference: JOWOG-28 meeting, Albuquerque, NM, USA, 1 Oct 1988; Other Information: Portions of this document are illegible in microfiche products
Research Org:
Sandia National Labs., Albuquerque, NM (USA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COMPOSITE MATERIALS; MECHANICAL PROPERTIES; EPOXIDES; REINFORCED MATERIALS; COMPARATIVE EVALUATIONS; MATERIALS TESTING; PHOTOMICROGRAPHY; MATERIALS; ORGANIC COMPOUNDS; ORGANIC OXYGEN COMPOUNDS; PHOTOGRAPHY; TESTING 360603* -- Materials-- Properties