Crack Behaviour in Laminar Ceramics with Strong Interfaces

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外文摘要：The paper deals with crack propagation in ceramic laminates. Assumptions of linear elastic fracture mechanics and small scale yielding are considered. Crack behaviour in a ceramic laminate body under external loading is investigated. Strong residual stresses due to different coefficients of thermal expansion of individual material layers are taken into account in finite element calculations. The change of crack propagation direction at the material interface is estimated on the base of the strain energy density factor and maximum tangential stress criteria. The influence of thickness of laminate layers on crack propagation direction is estimated. The stepwise crack propagation through the Al_2O_3-ZrO_2 ceramic laminate is numerically estimated. It can be concluded that good agreement between the estimated crack path and experimental data was found.

外文关键词：

ceramic laminatecrack propagation directionresidual stressflaw tolerant ceramic

作者：

Lubos Nahlik、Lucie Sestakova、Pavel Hutar

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作者单位：

Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Zizkova 22,616 62 Brno, Czech Republic Institute of Solid Mechanics, Mechatronics and Biomechanics, Brno University of Technology,Technicka 2, 616 69 Brno, Czech Republic

Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Zizkova 22,616 62 Brno, Czech Republic

出版年：

2010

Key engineering materials

ISSN：1013-9826

年,卷(期)：2010.417/418