PSI - Issue 28

ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000 Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceD rect Available online at www.sciencedirect.com ScienceDirect

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

Procedia Structural Integrity 28 (2020) 1010–1017

© 2020 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 European Structural Integrity Society (ESIS) ExCo Abstract Coated flat metal tensile specimens are widely used for determination mechanical properties of the coating-substrate system. These properties are identified by а comparison of an analytical model with experimentally observed delamination. Present paper deals with study the problem of a ceramic coating on a Co-Cr dental alloy substrate under tensile loading conditions. The stresses distribution in the coating and the coating-substrate interface has been analyzed. Based on the shear lag model, analytical solution was deduced. The effect of the factors, influencing o n the stress distributions, such as mismatch of Poisson’s ratio between the porcelain coating and Co-Cr substrate, are taken into account. Analytical equations for evaluation of the normal stresses in the coating and shear stresses at the coating-substrate interface are used. The stresses are determined and compared with those, given by the analytical model proposed by S. Frank et al. The normal stresses in both models are in good agreement. Present research explains the role of the stress transfer mechanism at the coating-substrate interface. Following experimental investigations are needed for validation of the two-dimensional analytical model. © 2020 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 European Structural Integrity Society (ESIS) ExCo Keywords: Co-Cr dental alloy; Coating-substrate system; Stresses distribution; Analytical model. Abstract Coated flat metal tensile specimens are widely used for determination mechanical properties of the coating-substrate system. These pr p rties are identified by а comp ison of an analytical model with experimentally obs rved delami ation. P esent paper deals with s udy the problem of a eramic coating on Co-Cr dental alloy substrate under t nsile lo ding c ditions. The stresse distribution in the coating and the coating-substrate interface has been analyzed. Base on the shear lag model, analytical solution was deduced. T e effect of the fa tors, influencing o n the stre s distributions, such as mismatch of Poisson’s ratio between the porcelain coating and Co-Cr substrate, are taken int account. Analytical equations for evaluation of the norm l stresses i c ating and shear stresses at the coating-substrate erfa e are used. The stresses are determined a d compared with those, given by the analytical model propos d by S. Frank e al. The normal tresses in both models are i good agreement. Present r search explains the role of the stress transfer mechanism at the coating-substrate in erface. Followin experim ntal inv stigations are needed for validation of the two-dim nsional alytical model. © 2020 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 European Structural Integrity Society (ESIS) ExCo Keywords: Co-Cr dental alloy; Coating-substrate system; Stresses distribution; Analytical model. 1st Virtual European Conference on Fracture Analytical approach for stress analysis in tensile test of ceramic coating on Co-Cr dental alloy substrate Nikolay Dolgov a , Tsanka Dikova b * a Pisarenko Institute for Problems of Strength, Nat. Ac. Sci. of Ukraine, 2 Timiryazevskaya Str, Kiev 01014, Ukraine b Faculty of Dental Medicine, Medical University of Varna, 84 Tsar Osvoboditel Blvd, Varna 9000, Bulgaria 1st Virtual European Conference on Fracture Analytical approach for stress analysis in tensile test of ceramic coating on Co-Cr dental alloy substrate Nikolay Dolgov a , Tsanka Dikova b * a Pisarenko Institute for Problems of Strength, Nat. Ac. Sci. of Ukraine, 2 Timiryazevskaya Str, Kiev 01014, Ukraine b Faculty of Dental Medicine, Medical University of Varna, 84 Tsar Osvoboditel Blvd, Varna 9000, Bulgaria

Nomenclature b d 1, d 2, d 3, d 4, d 5, d 5 Nomenclature b d 1, d 2, d 3, d 4, 5, d 5 E c

width of the coating and substrate width of the coating and substrate * – consta ts elastic modulu of the coating * – constants elastic modulus of the coating

E c

* Corresponding author. Tel.: +359-899-883125. E-mail address: tsanka.dikova@mu-varna.bg * Corresponding author. Tel.: +359-899-883125. E-mail address: tsanka.dikova@mu-varna.bg

2452-3216 © 2020 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 European Structural Integrity Society (ESIS) ExCo 2452-3216 © 2020 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 European Structural Integrity Society (ESIS) ExCo

2452-3216 © 2020 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 European Structural Integrity Society (ESIS) ExCo 10.1016/j.prostr.2020.11.116