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Title: Composite Bombcase Program: Static tests on Kevlar/epoxy and graphite/epoxy plates and rings

An experimental study supporting the Composite Bombcase Program is described. The purpose of the study was to generate mechanical properties and structural response data on composite plates and cylinders. This data base is now available to assist in the evaluation of composite materials for bombcase applications. Two composites, Kevlar 49/epoxy and IM6 graphite/epoxy, were chosen for testing. The mechanical properties from flat unidirectional specimens were used to predict the elastic response of thick quasi-isotropic laminates in four-point bending and the elastic response of 18.0 inch diameter quasi-isotropic rings to diametral compressive loading. Good agreement between theoretical and experimental values of elastic response was obtained for both geometries. Load-deflection and load-strain curves in the elastic, post-yield, and failure regions were obtained for composite and aluminum rings. Delamination between plies was the principal failure mode in the QI composite plate and ring specimens. Even with many delaminations at large deflections, composite rings continued to carry load and retain some structural integrity.
Authors:
Publication Date:
OSTI Identifier:
7130813
Report Number(s):
SAND-86-2163
ON: DE87002751
DOE Contract Number:
AC04-76DP00789
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
Research Org:
Sandia National Labs., Albuquerque, NM (USA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COMPOSITE MATERIALS; MECHANICAL PROPERTIES; ALUMINIUM; ARAMIDS; BENDING; BOMBS; COMPRESSION STRENGTH; COVERINGS; ELASTICITY; EPOXIDES; FAILURE MODE ANALYSIS; GRAPHITE; PLATES; RINGS; SHEAR PROPERTIES; TENSILE PROPERTIES; CARBON; ELEMENTAL MINERALS; ELEMENTS; MATERIALS; METALS; MINERALS; NONMETALS; ORGANIC COMPOUNDS; ORGANIC OXYGEN COMPOUNDS; PETROCHEMICALS; PETROLEUM PRODUCTS; PLASTICS; SYNTHETIC MATERIALS; SYSTEM FAILURE ANALYSIS; SYSTEMS ANALYSIS; WEAPONS 360603* -- Materials-- Properties