Subsurface Inclusions of Objects for Increasing Interlaminar Shear Strength of a Ceramic Matrix Composite Structure
First Claim
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1. A ceramic matrix composite structure comprising:
- a plurality of layers of ceramic fibers; and
a plurality of spaced apart objects on at least some of the plurality of layers along a thickness of the composite structure, wherein the inclusion of said objects introduces an out-of-plane fiber displacement arranged to increase an interlaminar shear strength of the structure.
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Abstract
A ceramic matrix composite (CMC) structure 12 includes a plurality of layers (e.g., 16, 18, 20) of ceramic fibers. The CMC structure 12 further includes a plurality of spaced apart objects 22 on at least some of the plurality of layers along a thickness of the composite structure. The inclusion of the objects introduces an out-of-plane fiber displacement arranged to increase an interlaminar shear strength of the structure.
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Citations
22 Claims
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1. A ceramic matrix composite structure comprising:
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a plurality of layers of ceramic fibers; and a plurality of spaced apart objects on at least some of the plurality of layers along a thickness of the composite structure, wherein the inclusion of said objects introduces an out-of-plane fiber displacement arranged to increase an interlaminar shear strength of the structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A ceramic matrix composite structure comprising:
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a plurality of layers of ceramic fibers disposed from a top layer to a bottom layer of the composite structure; and a plurality of spaced apart objects on at least some of the plurality of layers along a thickness of the composite structure, wherein the inclusion of said objects introduces an out-of-plane fiber displacement arranged to increase an interlaminar shear strength of the structure, wherein said at least some layers comprise a distribution along the thickness of the composite selected to at least in part to counteract an expected interlaminar shear load distribution along the thickness of the composite. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A ceramic matrix composite structure comprising:
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a plurality of layers of ceramic fibers; and a plurality of spaced apart objects on at least some of the plurality of layers along a thickness of the composite structure, wherein the inclusion of said objects introduces an out-of-plane fiber displacement arranged to increase an interlaminar shear strength of the structure, wherein a first group of the objects comprise spheroid objects distributed over said at least some layers to produce a sinusoidal out-of-plane fiber displacement, and further wherein a second group of the objects has a sufficient length dimension to penetrate into adjoining layers and include angulated ends to provide a degree of interlocking therebetween.
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Specification