ISSN:
1551-2916
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
A method to incorporate the thermoelastic effects of fiber coatings into models of fiber/matrix composites was deter-mined. The coated fiber was replaced by an “effective” transversely isotropic fiber so that the properties of this effective fiber could be used in composite models. This ap-proach was used to determine the magnitude of errors re-sulting from neglect of the coatings in modeling fiber/matrix debonding and sliding and in reduction of data from real composites. The effects of carbon and BN coatings in the Nicalon/SiC system were found to be significant. It was found that significant errors could be expected from fitting models to experimental data if the compliance and coeffi-cient of thermal expansion of the coatings were ignored, even when the coatings were thin. Wide use of the approach required revision of composite models to allow inclusion of a transversely isotropic fiber. Such a revision was de-rived for a popular model of matrix cracking stress, and significant effects again were found to result from neglect of coatings.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1151-2916.1999.tb01804.x
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