Compression failure in reduced adhesion fiber laminates

Journal Article · Thu Apr 01 04:00:00 EST 1993 · Journal of Engineering Materials and Technology; (United States)

DOI:https://doi.org/10.1115/1.2904205· OSTI ID:6785292

Swanson, S R; Colvin, G E ^[1]

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1. Univ. of Utah, Salt Lake City (United States)

The compressive strength of fiber composites is of key interest in many strength critical composite structures, due to the generally lower failure values relative to tension dominated stress states. The general understanding of the factors that control compression failure is quite rudimentary, and as a consequence strength controlled design of practical structures loaded in compression can not be accomplished on a rational basis at present. In recent work it has been shown that the compressive strength of the principal load carrying axial plies is markedly affected by the adjacent plies in the laminate. A micro-mechanics model for compression failure of laminates has been formulated that attempts to explain the observed behavior. In the present work a further verification of the model is presented by means of a comparison with experiments performed on laminates with specially treated fiber-matrix interphases. In addition to control specimens using fibers with standard surface treatment, tests were carried out on laminates in which the fibers were treated with a release agent to reduce fiber-matrix adhesion. The specimens with reduced fiber adhesion showed a loss of strength of up to 75%, indicating the effects of loss of matrix support. The results show that the model explains a number of important features of the experiments, and thus gives insight into compression failure of laminates.

• OSTI ID: 6785292
• Journal Information: Journal of Engineering Materials and Technology; (United States), Journal Name: Journal of Engineering Materials and Technology; (United States) Vol. 115:2; ISSN 0094-4289; ISSN JEMTA8
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ADHESION
CARBON FIBERS
COMPARATIVE EVALUATIONS
COMPOSITE MATERIALS
COMPRESSION STRENGTH
DATA
EVALUATION
EXPERIMENTAL DATA
FAILURES
FIBERS
INFORMATION
LAYERS
MATERIALS
MATHEMATICAL MODELS
MATRIX MATERIALS
MECHANICAL PROPERTIES
NUMERICAL DATA
TENSILE PROPERTIES