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Title: Failure mechanisms of laminated carbon-carbon composites; 2: Under shear loads

Abstract

Failure mechanisms under both interlaminar and in-plane shear loading are determined for two-dimensional carbon-carbon composites by using a direct shear set-up. This set-up is applicable for both types of shear loading as manufactured laminate thickness can be tested without the need to make long samples by gluing different pieces together. A detailed finite element analysis, which considers the microstructure of the composite shows that for woven laminates, the initial crimp angle morphology does not allow the composite to deform in a state of simple shear. In fact, normal tensile and compressive stresses of almost twice the magnitude of the peak shear stress are produced in the vicinity of the crimped bundles. Consistent with these predictions, the authors observed the shear fault following the crimp boundaries in 0[degree]/90[degree] and quasi-isotropic laminates. Therefore, experimental techniques which can secure a state of pure shear stress in aligned, unkinked, uniaxial fiber composites cannot do so in woven laminated composites.

Authors:
; ;  [1]
  1. (Dartmouth Coll., Hanover, NH (United States). Thayer School of Engineering)
Publication Date:
OSTI Identifier:
5153544
Resource Type:
Journal Article
Journal Name:
Acta Metallurgica et Materialia; (United States)
Additional Journal Information:
Journal Volume: 42:3; Journal ID: ISSN 0956-7151
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COMPOSITE MATERIALS; SHEAR PROPERTIES; COMPRESSION STRENGTH; DEFORMATION; STATIC LOADS; TENSILE PROPERTIES; MATERIALS; MECHANICAL PROPERTIES; 360603* - Materials- Properties

Citation Formats

Anand, K., Gupta, V., and Dartford, D. Failure mechanisms of laminated carbon-carbon composites; 2: Under shear loads. United States: N. p., 1994. Web. doi:10.1016/0956-7151(94)90275-5.
Anand, K., Gupta, V., & Dartford, D. Failure mechanisms of laminated carbon-carbon composites; 2: Under shear loads. United States. doi:10.1016/0956-7151(94)90275-5.
Anand, K., Gupta, V., and Dartford, D. Tue . "Failure mechanisms of laminated carbon-carbon composites; 2: Under shear loads". United States. doi:10.1016/0956-7151(94)90275-5.
@article{osti_5153544,
title = {Failure mechanisms of laminated carbon-carbon composites; 2: Under shear loads},
author = {Anand, K. and Gupta, V. and Dartford, D.},
abstractNote = {Failure mechanisms under both interlaminar and in-plane shear loading are determined for two-dimensional carbon-carbon composites by using a direct shear set-up. This set-up is applicable for both types of shear loading as manufactured laminate thickness can be tested without the need to make long samples by gluing different pieces together. A detailed finite element analysis, which considers the microstructure of the composite shows that for woven laminates, the initial crimp angle morphology does not allow the composite to deform in a state of simple shear. In fact, normal tensile and compressive stresses of almost twice the magnitude of the peak shear stress are produced in the vicinity of the crimped bundles. Consistent with these predictions, the authors observed the shear fault following the crimp boundaries in 0[degree]/90[degree] and quasi-isotropic laminates. Therefore, experimental techniques which can secure a state of pure shear stress in aligned, unkinked, uniaxial fiber composites cannot do so in woven laminated composites.},
doi = {10.1016/0956-7151(94)90275-5},
journal = {Acta Metallurgica et Materialia; (United States)},
issn = {0956-7151},
number = ,
volume = 42:3,
place = {United States},
year = {1994},
month = {3}
}