Degradation of Elastic Response of MMC Laminated Tubes due to Internal Fiber Cracks
Publication: Journal of Aerospace Engineering
Volume 10, Issue 1
Abstract
Previous experimental work has shown a reduction in the effective elastic response of [±45°]s SiC/Ti composite tubes under axial and torsional loading. There is considerable evidence of fiber/matrix debonding in off-axis plies and the presence of preexisting fiber cracks, extending radially from the carbon core of the SiC fiber, is also well documented. In this work, the Generalized Method of Cells (GMC) micromechanical model is used to calculate a constitutive equation for the composite material in each ply, in the presence of fiber cracks or fiber/matrix debonds. These constitutive equations are used in the exact analytical solution for the problem of an arbitrarily laminated tube under axisymmetric or torsional loading. By employing GMC in the solution to the tube problem, predictions are made as to the degree of degradation of the elastic response of these tubes due to partial or full debonding of the fiber/matrix interface or preexisting fiber cracks or a combination of both. These theoretical predictions are compared to experimental results.
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Published In
Journal of Aerospace Engineering
Volume 10 • Issue 1 • January 1997
Pages: 43 - 48
Copyright
Copyright © 1997 American Society of Civil Engineers.
History
Published online: Jan 1, 1997
Published in print: Jan 1997
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