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2022 Issue 4

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Е. М. Strungar, О. А. Staroverov, Е. М. Lynegova


DOI: 10.17804/2410-9908.2022.4.037-049

The paper presents the results of studying the mechanical behavior of laminated carbon-fiber-reinforced plastic under complex low-velocity impact three-point bending followed by cyclic tension. An integrated approach to studying damage accumulation patterns is implemented with the use of state-of-the-art testing and diagnostic equipment. The residual fatigue life of the composite is related to the intensity of preliminary impact bending. The fields of temperature distribution in the active zone of the samples during the tests are shown. Data on damage accumulation obtained by recording acoustic emission signals are presented. Relation of the change in the recorded acoustic response signals to infrared thermal scanning data has been detected, which is supported by the results of an experimental study. The use of additional equipment for infrared thermal scanning and recording of acoustic emission signals gives a complete picture of damage accumulation and failure in composite materials, with a good agreement with experimental data.

Acknowledgments: The experimental study was performed in the Perm National Research Polytechnic University and financially supported by a grant of the President of the Russian Federation for the state support of young Russian scientists (grant No. MK-1545.2022.4). The experimental investigations on estimating fatigue damage accumulation were made under the state assignment from the Ministry of Science and Higher Education of the Russian Federation (No. FSNM-2020-0027).

Keywords: experimental mechanics, low-velocity impact, cyclic bending, fatigue life, acoustic emission, infrared thermal scanning


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Article reference

Strungar Е. М., Staroverov О. А., Lynegova Е. М. Comprehensive Evaluation of Fatigue Damage Accumulation and Failure of Specimens with Operational Stress Concentrators // Diagnostics, Resource and Mechanics of materials and structures. - 2022. - Iss. 4. - P. 37-49. -
DOI: 10.17804/2410-9908.2022.4.037-049. -
URL: http://eng.dream-journal.org/issues/2022-4/2022-4_363.html
(accessed: 06/22/2024).


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