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Micromechanics of compressive fracture in particulate reinforced ceramics.

Authors
Laird-G II; Kennedy-TC
Source
Proc 16th Ann Conf on Composites & Adv Cer Mat Am Ceram Soc Westerville Ohio, :107-120
Link
NIOSHTIC No.
10011703
Abstract
SiC, Si3N4, and m-glass reinforced with TiB2, SiC, and Ni, respectively, were modeled using finite element analysis. Debonding between the matrix and particle was assumed; interfacial friction was modeled with friction coefficients (u) from 0.0 to 0.25. Stress intensity factors (k1) were calculated for an annular crack parallel to compressive loading. Numerical results showed that with a frictionless interface, stiff particles tended to force open the crack. Conversely, with u = 0.1 and 0.2, The crack flanks were restrained against the particle and k1 was decreased at the crack tip. This toughening effect was more pronounced as the elastic moduli mismatch was increased.
Publication Date
19920101
Document Type
Conference/Symposia Proceedings
Fiscal Year
1992
NTIS Accession No.
NTIS Price
Identifying No.
OP-227-92
Source Name
Proc 16th Ann Conf on Composites & Adv. Cer. Mat.; Am. Ceram. Soc., Westerville, OH, Pp 107-120
State
OH
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