Minimization of thermal stress intensity factor for a crack in a metal-ceramic mixture

Conference · Fri Oct 01 04:00:00 EDT 1993

OSTI ID:139697

Jin, Zhi-He; Noda, Naotake ^[1]

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1. Shizuoka Univ., Hamamatsu (Japan)

A crack at the interface between metal-ceramic mixtures mathematically modeled by nonhomogeneous solids subjected to steady heat flux over the boundaries is investigated. The crack faces are assumed to be completely insulated. It is assumed that all material properties depend only on the coordinate y (perpendicular to the crack faces) in such a way that the properties are some exponential functions of y. By using the Fourier transform, the thermal and mechanical problems are reduced to two systems of singular integral equations, respectively, which are solved numerically. The results show that by selecting the material constants appropriately, the stress intensity factor can be lowered substantially and a minimum stress intensity factor can be obtained in the material constants range considered in this paper. Some suggestions on fabrication of functionally gradient materials are made. 6 refs., 3 figs.

• OSTI ID: 139697
• Report Number(s): CONF-921128--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERAMICS
COMPOSITE MATERIALS
CRACKS
FABRICATION
FOURIER TRANSFORMATION
HEAT FLUX
INTERFACES
JOINING
MATHEMATICAL MODELS
METALS
MIXTURES
NUMERICAL ANALYSIS
STRESS INTENSITY FACTORS
THERMAL STRESSES