Optimization of Elastic Properties of Composite Laminates Using Fiber-Optic Strain Sensors
- PDF / 2,020,368 Bytes
- 19 Pages / 439.37 x 666.142 pts Page_size
- 120 Downloads / 251 Views
Optimization of Elastic Properties of Composite Laminates Using Fiber-Optic Strain Sensors Mikhail A. Tashkinov 1
& Valeriy P. Matveenko
2
Received: 23 March 2020 / Accepted: 21 July 2020/ # Springer Nature B.V. 2020
Abstract
The paper is devoted to combined computational and experimental approach for estimation of the elastic mechanical properties of structures made of laminate polymer composite materials (PCM). The computational component of the technique is connected with numerical simulation of mechanical behavior during quasistatic deformation of structures made of PCM. The experimental component is based on measurement of strains by fiberoptic strain sensors (FOSS) with Bragg gratings (FBG sensors), embedded in composite laminates or attached to them. The principle of the proposed method is based on the comparison of the data from FBG sensors, placed in the predetermined control points in the composite structure, with the data of numerical finite element modelling of the same structure. To refine the elastic constants in accordance with the information received from the FBG sensors, an algorithm is proposed, according to which the inverse problems are solved in order to ensure that the numerical and experimental results coincide with the specified accuracy. The implementation of the algorithm is demonstrated on the example case studies. Keywords Mechanical characteristics . Fiber-optic strain sensors . Bragg gratings . Optimization algorithm . Finite element method
1 Introduction Laminated polymer composite materials (PCM) are commonly applied for creation of highly demanding structures for industrial and engineering applications. Successful practical utilization of all the advantages of PCM is connected with comprehensive study of their behavior under typical operational loads in order to optimize the functional properties that can be * Mikhail A. Tashkinov [email protected]
1
Perm National Research Polytechnic University, Komsomolsky Ave., 29, Perm 614990, Russia
2
Institute of Continuous Media Mechanics, Russian Academy of Science, Academician Korolev Street, 1, Perm 614013, Russia
Applied Composite Materials
predetermined at the manufacturing stage. Hence, the problem of analysis and prognosis of mechanical behavior of advanced composite materials and structures during their design, manufacturing and exploitation is urgent and attracts attention of many researchers. Despite the unique strength characteristics, laminated PCMs are exposed to a number of operational defects, which cannot be inspected with the naked eye. Nevertheless, such defects can lead to critical damage and loss of structural load capacity. Hence, the idea of creating materials that together with the basic functions allow to collect information about their condition is very relevant for PCM laminates. The application fields of these materials are developing so rapidly that the current state of numerical and experimental methods for assessment of their performance, strength and durability does not always meet the desired re
Data Loading...
