Micromechanics of compressive fracture in particulate reinforced ceramics

Conference · Sat Aug 01 04:00:00 EDT 1992 · Ceramic Engineering and Science Proceedings; (United States)

OSTI ID:7201620

Laird, G II; Kennedy, T C

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 (mu) from 0.0 to 0.25. Stress intensity factors (Kl) were calculated for an annular crack parallel to compressive loading. Numerical results showed with a frictionless interface stiff particles tended to force open the crack. Conversely, with mu = 0.1 and 0.2, the crack flanks were restrained against the particle and Kl was decreased at the crack tip. This toughening effect was more pronounced as the elastic moduli mismatch was increased. 17 refs.

• OSTI ID: 7201620
• Report Number(s): CONF-920144--
• Conference Information: Journal Name: Ceramic Engineering and Science Proceedings; (United States) Journal Volume: 13:7-8
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
BORIDES
BORON COMPOUNDS
CARBIDES
CARBON COMPOUNDS
COMPOSITE MATERIALS
COMPRESSION
CRACK PROPAGATION
ELASTICITY
ELEMENTS
FINITE ELEMENT METHOD
FRACTURE MECHANICS
FRACTURE PROPERTIES
FRICTION
GLASS
INTERFACES
MATERIALS
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
MECHANICS
METALS
NICKEL
NITRIDES
NITROGEN COMPOUNDS
NUMERICAL SOLUTION
PARTICLES
PARTICULATES
PNICTIDES
REINFORCED MATERIALS
SILICON CARBIDES
SILICON COMPOUNDS
SILICON NITRIDES
STRESS INTENSITY FACTORS
TENSILE PROPERTIES
TITANIUM BORIDES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS