KFU. Card publication. Identification of the Elastic Characteristics of a Composite Material Based on the Results of Tests for the Stability of Panels Made from It

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IDENTIFICATION OF THE ELASTIC CHARACTERISTICS OF A COMPOSITE MATERIAL BASED ON THE RESULTS OF TESTS FOR THE STABILITY OF PANELS MADE FROM IT

Form of presentation

Articles in international journals and collections

Year of publication

2019

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Authors, employees of KFU

Tazyukov Bulat Feridovich, author

Bibliographic description in the original language

Kayumov R. A., Tazyukov B. F., Muhamedova I. Z., Identification of the Elastic Characteristics of a Composite Material Based on the Results of Tests for the Stability of Panels Made from It//UCHENYE ZAPISKI KAZANSKOGO UNIVERSITETA-SERIYA FIZIKO-MATEMATICHESKIE NAUKI. - 2019. - Vol.161, Is.1. - P.75-85.

Annotation

The problem of identifying the mechanical characteristics of a fibrous composite material (FCM), from which cylindrical panels or pre-curved plates are made by superposition at an angle to the edge, has been considered. The problem has been solved using the analysis of the results of the tests of structures with bringing them to the loss of bearing capacity due to loss of stability. The advantage of the proposed approach is no necessity to measure the deformation or movement of these structural elements during experiments (this does not require the presence of complex measuring devices, their calibration, long-term debugging of the experimental techniques). Only the critical values of the load, which can be tested in a short period of time, must be determined. In addition, such tests are not destructive under loading, which enables the repeated use of the sample under different types of load and conditions of fixing. The identification technique is based on minimizing the quadratic discrepancy between the results of solving direct problems of stability and the results of experiments. By introducing the discrepancy of possible errors in experimental data measurement, an extended formulation of the problem has been obtained. Numerical solutions of the model problems show that the solution of the problem is stable to variations of the original data. The proposed approach allows to obtain the calculated mechanical characteristics of the composite material close to true even in the case of a considerable variation in the stiffness characteristics of the composite material from sample to sample and errors in determining the critical load.

Keywords

Critical load, Fiber composite, Identification method, Minimization, Numerical experiment, Stability, Stiffness characteristics

The name of the journal

UCHENYE ZAPISKI KAZANSKOGO UNIVERSITETA-SERIYA FIZIKO-MATEMATICHESKIE NAUKI

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=214354&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Tazyukov Bulat Feridovich	ru_RU
dc.date.accessioned	2019-01-01T00:00:00Z	ru_RU
dc.date.available	2019-01-01T00:00:00Z	ru_RU
dc.date.issued	2019	ru_RU
dc.identifier.citation	Kayumov R. A., Tazyukov B. F., Muhamedova I. Z., Identification of the Elastic Characteristics of a Composite Material Based on the Results of Tests for the Stability of Panels Made from It//UCHENYE ZAPISKI KAZANSKOGO UNIVERSITETA-SERIYA FIZIKO-MATEMATICHESKIE NAUKI. - 2019. - Vol.161, Is.1. - P.75-85.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=214354&p_lang=2	ru_RU
dc.description.abstract	UCHENYE ZAPISKI KAZANSKOGO UNIVERSITETA-SERIYA FIZIKO-MATEMATICHESKIE NAUKI	ru_RU
dc.description.abstract	The problem of identifying the mechanical characteristics of a fibrous composite material (FCM), from which cylindrical panels or pre-curved plates are made by superposition at an angle to the edge, has been considered. The problem has been solved using the analysis of the results of the tests of structures with bringing them to the loss of bearing capacity due to loss of stability. The advantage of the proposed approach is no necessity to measure the deformation or movement of these structural elements during experiments (this does not require the presence of complex measuring devices, their calibration, long-term debugging of the experimental techniques). Only the critical values of the load, which can be tested in a short period of time, must be determined. In addition, such tests are not destructive under loading, which enables the repeated use of the sample under different types of load and conditions of fixing. The identification technique is based on minimizing the quadratic discrepancy between the results of solving direct problems of stability and the results of experiments. By introducing the discrepancy of possible errors in experimental data measurement, an extended formulation of the problem has been obtained. Numerical solutions of the model problems show that the solution of the problem is stable to variations of the original data. The proposed approach allows to obtain the calculated mechanical characteristics of the composite material close to true even in the case of a considerable variation in the stiffness characteristics of the composite material from sample to sample and errors in determining the critical load.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Critical load	ru_RU
dc.subject	Fiber composite	ru_RU
dc.subject	Identification method	ru_RU
dc.subject	Minimization	ru_RU
dc.subject	Numerical experiment	ru_RU
dc.subject	Stability	ru_RU
dc.subject	Stiffness characteristics	ru_RU
dc.title	Identification of the Elastic Characteristics of a Composite Material Based on the Results of Tests for the Stability of Panels Made from It	ru_RU
dc.type	Articles in international journals and collections	ru_RU