Fracture Resistance of Residually-Stressed Ceramic Laminated Structures.

Authors :: Gogotsi, G. A.
Lugovoi, N. I.
Slyunyaev, V. N.
Source :: Strength of Materials; May/Jun2004, Vol. 36 Issue 3, p291-303, 13p
Publication Year :: 2004
Abstract: We have studied the effect of residual stresses on fracture resistance and crack arrest behavior of asymmetric ceramic laminated Si<subscript>3</subscript>N<subscript>4</subscript>/Si<subscript>3</subscript>N<subscript>4</subscript>-TiN structures. Using the compliance method, we assessed the technique of R-curve construction for laminar composites. For laminar structures with layers varying by their elastic characteristics we developed an analytical method for calculation of "fracture resistance - crack length" dependence. The method applicability is verified by calculation of stress intensity factors for laminar specimens with an edge crack The calculated results are compared to the experimental data. [ABSTRACT FROM AUTHOR]