PSI - Issue 40

ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com Sci nceDire t Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 40 (2022) 385–391

© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the15th International Conference on Mechanics, Resources and Diagnostics of Materials and Structures. Abstract The internal stresses in a disk-shaped ceramic composite sample consisting of five ZrB 2 – 20% SiC layers with various additives of ZrO 2 after cooling down from the sintering temperature are analyzed. The problem is solved numerically using the finite element method. Three versions of the simulation were performed. In the first two simulations, it was supposed that all the properties of the composite constituents are temperature independent and correspond to the temperature of sintering and room temperature, respectively. In the third simulation, we take into account the dependence of the physical and mechanical characteristics of the composite components on the temperature. Comparing the results reveals a profound effect of the temperature dependence of the properties. The residual thermal stresses determined on different sides of the layer interfaces vary in hundreds of MPa. The tensile residual thermal stress level is shown to be high enough for possible cracking of the ceramic layered composite after cooling. © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the 15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures. Keywords: residual stress; thermal stress; ultra high temperature ceramics; composite; numerical modeling; fracture. 15th International Conference on Mechanics, Resource and Diagnostics of Materials and Stru tures Assessment of possibility of thermal fracture in layered ceramic composite I.Yu. Smolin*, V.A. Zimina, S.P. Buyakova Institute of Strength Physics and Materials Science SB RAS, 2/4 Pr. Akademicheskii, Tomsk 634055, Russia Abstract The internal stresses in a disk-shaped ceramic composite sample consisting of five ZrB 2 – 20% SiC layers with various additives of ZrO 2 after cooling down from the sintering temperature ar analyzed. The problem is solved numerically using the finite element method. Three versions of the simulation w e p rformed. In the first two simulations, it was supposed that all th prop rties of the composite c tituents are temperatu independent and cor espond to the emperature of sintering nd room tem rature, respectively. In the third simulation, w tak i to account th dependence of the physical and mechanical characteristics of the composite components on the temp rature. Comparing the results reveals a profound effect of the temperature dependence of the properties. The residual thermal str sses determined on different side of the layer interfaces vary in hundreds of MPa. The tensile residual thermal stress l vel i shown to be high e ough for possible cracking of the ramic layere composite fter cooli g. © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review u der re ponsibility of scientific committe of the 15th Internati nal Confe ence on Mechanics, Resource and Diagnostics of Materials and S ructur s. Keywords: residual stress; thermal stress; ultra high temperature ceramics; composite; numerical modeling; fracture. 15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures Assessment of possibility of thermal fracture in layered ceramic composite I.Yu. Smolin*, V.A. Zimina, S.P. Buyakova Institute of Strength Physics and Materials Science SB RAS, 2/4 Pr. Akademicheskii, Tomsk 634055, Russia

* Corresponding author. Tel.: +7-382-228-6876 ; fax: +7-382-249-2576 . E-mail address: smolin@ispms.ru * Corresponding author. Tel.: +7-382-228-6876 ; fax: +7-382-249-2576 . E-mail address: sm lin@ispms.ru

2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures. 2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review u der responsibility of t scientific committe of the15th Int rnational C ference o Mechanics, Resource and Diagnostics of Materials and Structures.

2452-3216 © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the15th International Conference on Mechanics, Resources and Diagnostics

of Materials and Structures. 10.1016/j.prostr.2022.04.052