Analyses of residual thermal stresses in ceramic matrix composites
Residual thermal stresses in ceramic matrix composites containing either ellipsoidal inclusions or short fibers (i.e., fibers of finite length) are considered. First, the residual stresses in ellipsoidal inclusions are uniform, and they are analyzed using a modified Eshelby model. Although closed-form analytical solutions are obtained, their formulations are formidable. When the aspect ratio of the ellipsoid is 0, 1, or infinity, simple analytical solutions can be obtained using different models, and they are in excellent agreement with those obtained from the modified Eshelby model. Second, residual stresses in short fibers are nonuniform, and they are analyzed using a modified shear lag model, in which imaginary fibers are introduced to satisfy the continuity condition at the fiber ends. The analytical solutions are compared to the experimental results.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 188931
- Report Number(s):
- CONF-950129-11; ON: DE96004936; TRN: 96:001409
- Resource Relation:
- Conference: 19. annual conference on advanced ceramics, materials and structures, Cocoa Beach, FL (United States), 9-12 Jan 1995; Other Information: PBD: 1995
- Country of Publication:
- United States
- Language:
- English
Similar Records
Observations on residual stresses in ceramic composites by neutron diffraction techniques. [SiC whisker--Al/sub 2/O/sub 3/ matrix]
Influence of residual stresses, interface roughness, and fiber coatings on interfacial properties in ceramic composites