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Reliability analysis of ceramic matrix composite laminatesAt a macroscopic level, a composite lamina may be considered as a homogeneous orthotropic solid whose directional strengths are random variables. Incorporation of these random variable strengths into failure models, either interactive or non-interactive, allows for the evaluation of the lamina reliability under a given stress state. Using a non-interactive criterion for demonstration purposes, laminate reliabilities are calculated assuming previously established load sharing rules for the redistribution of load as the failure of laminae occur. The matrix cracking predicted by ACK theory is modeled to allow a loss of stiffness in the fiber direction. The subsequent failure in the fiber direction is controlled by a modified bundle theory. Results using this modified bundle model are compared with previous models which did not permit separate consideration of matrix cracking, as well as to results obtained from experimental data.
Document ID
19920033007
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Thomas, David J.
(State Univ. of New York Buffalo, NY, United States)
Wetherhold, Robert C.
(New York, State University Buffalo, United States)
Date Acquired
August 15, 2013
Publication Date
June 1, 1991
Subject Category
Composite Materials
Report/Patent Number
ASME PAPER 91-GT-211
Accession Number
92A15631
Funding Number(s)
CONTRACT_GRANT: NAG3-862
Distribution Limits
Public
Copyright
Other

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