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Crack propagation in functionally graded strip under thermal shock

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Abstract

The thermal shock problem in a strip made of functionally graded composite with an interpenetrating network micro-structure of Al2O3 and Al is analysed numerically. The material considered here could be used in brake disks or cylinder liners. In both applications it is subjected to thermal shock. The description of the position-dependent properties of the considered functionally graded material are based on experimental data. Continuous functions were constructed for the Young’s modulus, thermal expansion coefficient, thermal conductivity and thermal diffusivity and implemented as user-defined material properties in user-defined subroutines of the commercial finite element software ABAQUS™. The thermal stress and the residual stress of the manufacturing process distributions inside the strip are considered. The solution of the transient heat conduction problem for thermal shock is used for crack propagation simulation using the XFEM method. The crack length developed during the thermal shock is the criterion for crack resistance of the different graduation profiles as a step towards optimization of the composition gradient with respect to thermal shock sensitivity.

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Correspondence to I.V. Ivanov or T. Sadowski.

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Ivanov, I., Sadowski, T. & Pietras, D. Crack propagation in functionally graded strip under thermal shock. Eur. Phys. J. Spec. Top. 222, 1587–1595 (2013). https://doi.org/10.1140/epjst/e2013-01947-3

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  • DOI: https://doi.org/10.1140/epjst/e2013-01947-3

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