PSI - Issue 50

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

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

Procedia Structural Integrity 50 (2023) 105–112

© 2023 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 MRDMS 2022 organizers Abstract A correct assessment of the stress-strain state and the strength of composites requires both reliable material deformation models verified by the experimental results and correct failure criteria for the full realization of the material strength potential. It is difficult to assess the material strength due to the complexity of biaxial tests and non-obviousness of the obtained results, especially in the case of biaxial loading in the out-of-plane direction. The aim of this study is to compare simplified experimental methods for determining the interlaminar shear properties of composites under through-thickness compression. The combination of inter laminar shear and through-thickness compression stresses was varied in two ways: by changing the cut angle of cubic specimens and by loading V-notched specimens at different angles in a new device. © 202 3 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 MRDMS 2022 organizers Keywords: Polymer matrix composites (PMCs); biaxial loading; shear strength; nonlinear behaviour; thick-walled composites; failure criteria; woven carbon/epoxy laminates Abstract A correct assessment of the stress-strain state and the strength of composites requires both reliable material deformation models verified by the experimental results and correct failure criteria for the full realization of the material strength potential. It is difficult to assess the material strength due to the complexity of biaxial tests and non-obviousness of the obtained results, especially in the case of biaxial loading in the out-of-plane direction. The aim of this study is to compare simplified experimental methods for determining the interlaminar shear properties of composites under through-thickness compression. The combination of inter laminar shear and through-thickness compression stresses was varied in two ways: by changing the cut angle of cubic specimens and by loading V-notched specimens at different angles in a new device. © 202 3 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 MRDMS 2022 organizers Keywords: Polymer matrix composites (PMCs); biaxial loading; shear strength; nonlinear behaviour; thick-walled composites; failure criteria; woven carbon/epoxy laminates 16th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures (MRDMS 2022) Comparison of the effectiveness of simplified experimental approaches to studying through-thickness compression effect on 16th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures (MRDMS 2022) Comparison of the effectiveness of simplified experimental approaches to studying through-thickness compression effect on interlaminar shear properties of woven CFRP Kirill Guseinov a *, Oleg Kudryavtsev a , Sergei Sapozhikov a a Department of Mechanical Engineering, South Ural State University, Lenina 76, Chelyabinsk, 454080, Russia interlaminar shear properties of woven CFRP Kirill Guseinov a *, Oleg Kudryavtsev a , Sergei Sapozhikov a a Department of Mechanical Engineering, South Ural State University, Lenina 76, Chelyabinsk, 454080, Russia

Nomenclature σ x Nomenclature σ x 3

compressive stresses in the global coordinate system through-thickness compression stresses compressive stresses in the global coordinate system through-thickness compression stresses

σ 3

* Corresponding author. Tel.:+7-950-748-4284. E-mail address: guseinovk@susu.ru * Corresponding author. Tel.:+7-950-748-4284. E-mail address: guseinovk@susu.ru

2452-3216 © 2023 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 MRDMS 2022 organizers 2452-3216 © 2023 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 MRDMS 2022 organizers

2452-3216 © 2023 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 MRDMS 2022 organizers 10.1016/j.prostr.2023.10.028