PSI - Issue 40

I.Yu. Smolin et al. / Procedia Structural Integrity 40 (2022) 385–391 I. Yu. Smolin et al./ Structural Integrity Procedia 00 (2022) 000 – 000

391

7

5. Conclusion The numerical analysis of the residual internal stresses in a disk-shaped sample of a five-layered ceramic composite consisting of five layers of ZrB 2 – 20% SiC with various additives of ZrO 2 after cooling down from the sintering temperature to room temperature is carried out. The simulations were performed by taking into account the temperature dependence of the physical and mechanical characteristics of the composite constituents and under the assumption of the temperature independent properties. It is shown that the temperature dependence of the material parameters makes a great impact on the distribution of residual thermal stress in the ceramic composite, which is obtained by computer simulation. If one prefers to take the material parameters as constant for engineering estimation, it is preferable to choose their values for high temperature than for room temperature. The internal residual thermal stresses determined on different sides of the layer interfaces vary in several hundreds of MPa. It is shown that tensile stresses are more pronounced in the interfaces of outer layers and they are found to be dangerous for cracking of ceramics layers. The difference in the thermal expansion coefficients of ceramic composite constituents results in buckling of the disk during cooling. To prevent buckling, compressive pressure could be applied to its flat surfaces, which will result in the change of residual stress distribution. Acknowledgements The work was performed according to the Government research assignment for ISPMS SB RAS, project FWRW Bermejo, R., Baudín, C., Moreno, R., Llanes, L., Sánchez -Herencia, A. J. 2007. Processing Optimisation and Fracture Behaviour of Layered Ceramic Composites with Highly Compressive Layers. Composites Science and Technology 67(9), 1930 – 1938. https://doi.org/https://doi.org/10.1016/j.compscitech.2006.10.010. Burlachenko, A.G., Mirovoi, Y.A., Dedova, E.S., Buyakova, S. P., 2019. Mechanical Response of ZrB 2 – SiC – ZrO 2 Composite Laminate. Russian Physics Journal 62, 1438 – 1444. https://doi.org/10.1007/s11182-019-01861-2. Chakraborty, S., Debnath, D., Mallick, A.R., et al., 2014. Mechanical and Thermal Properties of Hot-Pressed ZrB 2 -SiC Composites. Metallurgical and Materials Transactions A 45, 6277 – 6284. https://doi.org/10.1007/s11661-014-2563-z. De Portu, G., Micele, L., Sekiguchi, Y., Pezzotti, G. 2005. Measurement of Residual Stress Distributions in Al2O3/3Y-TZP Multilayered Composites by Fluorescence and Raman Microprobe Piezo-Spectroscopy. Acta Materialia 53(5), 1511 – 20. https://doi.org/10.1016/j.actamat.2004.12.003. Gasch, M.J., Ellerby, D.T., Johnson, S.M., 2005.Ultra High Temperature Ceramic Composites, in “Handbook of Ceramic Composites” , Bansal, N.P. (Ed.). Springer US, Boston, pp. 197 – 224. https://doi.org/10.1007/0-387-23986-3_9. Iikubo, S., Ohtani, H., Hasebe, M., 2010. First-Principles Calculations of the Specific Heats of Cubic Carbides and Nitrides. Materials Transactions 51(3), 574 – 577. http://dx.doi.org/10.2320/matertrans.MBW200913. Lugovy, M., Slyunyayev, V., Orlovskaya, N., Mitrentsis, E., Aneziris, C.G., Graule, T., Kuebler, J., 2016. Temperature Dependence of Elastic Properties of ZrB 2 – SiC Composites. Ceramics International 42, 2439 – 2445. https://doi.org/10.1016/j.ceramint.2015.10.044. Nowacki, W., 1986, Thermoelasticity. Pergamon Press, New York. Skripnyak, V.V., Skripnyak V.A., 2017. Predicting the Mechanical Properties of Ultra-High Temperature Ceramics. Letters on Materials 7(4), 407 – 411. https://doi.org/10.22226/2410-3535-2017-4-407-411. Yang, Y., 2015.Temperature-Dependent Thermoelastic Analysis of Multidimensional Functionally Graded Materials. PhD Thesis, University of Pittsburgh. http://d-scholarship.pitt.edu/26481/ Zhang, H., Yan, Y., Huang, Z., Liu, X., Jiang, D., 2009. Properties of ZrB2 – SiC Ceramics by Pressureless Sintering. Journal of the American Ceramic Society 92, 1599 – 1602. https://doi.org/10.1111/j.1551-2916.2009.03039.x. Zimmermann, J.W., Hilmas, G.E., Fahrenholtz, W.G., Dinwiddie, R.B., Porter, W.D., Wang, H., 2008. Thermophysical Properties of ZrB 2 and ZrB 2 – SiC Ceramics. Journal of the American Ceramic Society 91, 1405-1411. https://doi.org/10.1111/j.1551-2916.2008.02268.x. 2021-0009. References Bayati Chaleshtari, M.H., Khoramishad, H., Berto, F. 2020. Analytical Thermal Stress Analysis of Perforated Symmetric Composite Laminates Containing a Quasi-Triangular Hole. Physical Mesomechanics 23(6), 514 – 530. https://doi.org/10.1134/S1029959920060077.