PSI - Issue 59

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2024) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2024) 000 – 000 Available online at www.sciencedirect.com ScienceDirect

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Procedia Structural Integrity 59 (2024) 466–470

© 2024 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 DMDP 2023 Organizers © 202 4 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 DMDP 2023 Organizers Abstract The article is devoted to the development of an approach to the study of the influence of changes in the physical, mechanical, and microstructural parameters of foams on their vibration-absorbing properties. The proposed problem is implemented based on the investigation of changes in the intensity of normal stresses in the layers of foam media. Numerical calculations used a method based on applying the indirect approach of the boundary element method within the framework of couple stress elasticity. The obtained numerical results confirm the significant dependence of the impact of mechanical, physical, and microstructural characteristics of polyurethane foams on their vibration-absorbing properties. The influence of the internal structure of the material is significant on the speed of propagation of waves in the medium. The proposed approach will allow for the optimisation of the operational characteristics of foamed materials by selecting the parameters of the appropriate materials. © 202 4 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 DMDP 2023 Organizers VII International Conference “In -service Damage of Materials: Diagnostics and Prediction ” (DMDP 2023) Simulation analysis of the influence of changing mechanical characteristics of polyurethane foams Olena Mikulich*, Nataliya Komenda, Oksana Guda, Tetiana Kradinova Lutsk National Technical University, 75 Lvivsta str., Lutsk, Ukraine, 43018 Abstract The article is devoted to the development of an approach to the study of the influence of changes in the physical, mechanical, and microstructural parameters of foams on their vibration-absorbing properties. The proposed problem is implemented based on the investigation of changes in the intensity of normal stresses in the layers of foam media. Numerical calculations used a method based on applying the indirect approach of the boundary element method within the framework of couple stress elasticity. The obtained numerical results confirm the significant dependence of the impact of mechanical, physical, and microstructural characteristics of polyurethane foams on their vibration-absorbing properties. The influence of the internal structure of the material is significant on the speed of propagation of waves in the medium. The proposed approach will allow for the optimisation of the operational characteristics of foamed materials by selecting the parameters of the appropriate materials. VII International Conference “In -service Damage of Materials: Diagnostics and Prediction ” (DMDP 2023) Simulation analysis of the influence of changing mechanical characteristics of polyurethane foams Olena Mikulich*, Nataliya Komenda, Oksana Guda, Tetiana Kradinova Lutsk National Technical University, 75 Lvivsta str., Lutsk, Ukraine, 43018

Keywords: polyurethane foam, vidro-absorption propertiy, normal stress. Keywords: polyurethane foam, vidro-absorption propertiy, normal stress.

1. Introduction The significant use of foamed polymers in production is due to the ease of their production and the significant advantages of such materials. The advantages of such materials are their high strength combined with low weight, 1. Introduction The significant use of foamed polymers in production is due to the ease of their production and the significant advantages of such materials. The advantages of such materials are their high strength combined with low weight,

* Corresponding author. Tel.: +380504380235 E-mail address: shyprao@gmail.com * Corresponding author. Tel.: +380504380235 E-mail address: shyprao@gmail.com

2452-3216 © 202 4 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 DMDP 2023 Organizer 2452-3216 © 202 4 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 DMDP 2023 Organizer

2452-3216 © 2024 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 DMDP 2023 Organizers 10.1016/j.prostr.2024.04.066