Residual stresses in ceramic-interlayer-metal joints
- Naval Research Lab., Washington, D.C. (United States)
Thermal residual stresses due to the thermal expansion mismatch in a ceramic-interlayer-metal joint are calculated analytically. A qualitative estimate of the stress distribution is obtained by assuming the joint consists of one or two elastic slabs sandwiched between two semi-infinite isotropic elastic solids. These elastic solids and the interlayer(s) are perfectly bonded to each other at the planar interfaces. The region where temperature change takes place is assumed to be a cylinder with its axis normal to the interface. A simple equation is obtained for the stress value at the center of the ceramic-interlayer interface as a function of the thermal expansion coefficients, elastic constants of the constituent materials, and the thickness of the interlayer(s). The results obtained by this simple model agree well, qualitatively, with those obtained experimentally and numerically (finite element calculations). An appropriate interlayer material to reduce the residual stress in ceramic-metal joints is suggested.
- OSTI ID:
- 6354776
- Journal Information:
- Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 76:7; ISSN 0002-7820; ISSN JACTAW
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360101* -- Metals & Alloys-- Preparation & Fabrication
360103 -- Metals & Alloys-- Mechanical Properties
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ANALYTICAL SOLUTION
BONDING
CERAMICS
ELEMENTS
EXPANSION
FABRICATION
INTERFACES
JOINING
JOINTS
METALS
RESIDUAL STRESSES
STRESSES
THERMAL EXPANSION
THERMAL STRESSES