Fracture Resistance of Residually-Stressed Ceramic Laminated Structures |
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Authors: | Gogotsi G A Lugovoi N I Slyunyaev V N |
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Affiliation: | (1) Pisarenko Institute of Problems of Strength, National Academy of Sciences of Ukraine, Kiev, Ukraine |
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Abstract: | We have studied the effect of residual stresses on fracture resistance and crack arrest behavior of asymmetric ceramic laminated Si
3
N
4/Si
3
N
4–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. |
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Keywords: | layer structure fracture toughness modeling crack arrest residual stresses |
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