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IssuesArchive of Issues2004-2pp.74-81

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R. A. Kayumov, "Extended problem of the identification of mechanical characteristics of materials on the basis of testing of structures," Mech. Solids. 39 (2), 74-81 (2004)
Year 2004 Volume 39 Number 2 Pages 74-81
Title Extended problem of the identification of mechanical characteristics of materials on the basis of testing of structures
Author(s) R. A. Kayumov (Kazan)
Abstract Problems of the identification of mechanical characteristics of materials on the basis of test data for structures made of these materials have drawn rather much attention [1-16]. These problems are in essence inverse problems which can be ill-conditioned and need regularization methods to be solved. This approach is particularly attractive for determining mechanical characteristics of composite materials like tapes and braids, since it permits one to overcome technical difficulties of identifying these characteristics in the direction orthogonal to the reinforcement direction. In addition, this approach indirectly takes into account technological features manufacturing the structures.

In the present study, an approach is suggested which makes it possible to obtain good agreement between computational and experimental data by extending the problem of identification. It is shown on the basis of an example of the processing of the results of a realistic experiment that this approach gives the discrepancies between computational and experimental parameters which are several times smaller than those for the traditional approach.
References
1.  N. A. Alfutov, P. A. Zinov'ev, and L. P. Tairova, "Identification of elastic characteristics of unidirectional materials on the basis of the test results for laminated composites," in Strength Analysis [in Russian], No. 30, pp. 16-31, Mashinostroenie, Moscow, 1989.
2.  Yu. V. Suvorova, V. S. Dobrynina, I. N. Statnikov, and Yu. Ya. Bart, "Determination of the properties of a composite in a structure by using the method of parametric identification," Mekhanika Kompozitsionnykh Materialov, No. 1, pp. 150-157, 1989.
3.  I. G. Teregulov, "Asymptotic analysis and classification of the constitutive relations for fibrous composites and anisotropic shells in the case of finite and inelastic strains," Doklady AN SSSR, Vol. 302, No. 6, pp. 1333-1336, 1988.
4.  R. A. Kayumov, "Plastic flow of fiber-reinforced materials and fracture of structures made of these materials," Mekhanika Kompozitsionnykh Materialov, Vol. 29, No. 1, pp. 77-83, 1993.
5.  R. A. Kayumov, "Identification of mechanical characteristics of materials and design of structures made of these materials," Izv. AN. MTT [Mechanics of Solids], No. 6, pp. 118-127, 1999.
6.  I. G. Teregulov, R. A. Kayumov, Yu. I. Butenko, and D. Kh. Safiullin, "Identification of mechanical characteristics of composites on the basis of the test results for laminated specimens," Mekhanika Kompozitsionnykh Materialov, Vol. 31, No. 5, pp. 607-615, 1995.
7.  G. V. Vorontsov, B. I. Plyushchev, A. I. Reznichenko, "Identification of reduced elastic characteristics of reinforced composites by using the inverse strain measurement methods," Mekhanika Kompozitsionnykh Materialov, No. 4, pp. 733-747, 1990.
8.  R. Rikards and A. Chate, "Identification of mechanical characteristics of composite materials on the basis of the planning of experiment," Mekhanika Kompozitsionnykh Materialov, Vol. 34, No. 1, pp. 3-16, 1998.
9.  P. S. Frederiksen, "Experimental procedure and results for the identification of elastic constants of thick orthotropic plates," J. Composite Mater., Vol. 31, No. 4, pp. 360-382, 1997.
10.  A. S. Kravchuk, "Algorithms of tomography in the theory of elasticity," PMM [Applied Mathematics and mechanics], Vol. 63, No. 3, pp. 509-512, 1999.
11.  I. F. Obraztsov and Yu. G. Yanovskii, "The role of the hierarchical adaptive approach in the mechanics of heterogeneous media," Izv. AN. MTT [Mechanics of Solids], No. 6, pp. 95-117, 1999.
12.  D. L. Bykov and D. N. Konovalov, "Determination of material functions in the nonlinear theory of thermoviscoelasticity using its hierarchical structure," Izv. AN. MTT [Mechanics of Solids], No. 5, pp. 189-205, 1999.
13.  V. P. Matvienko and N. A. Yurlova, "Identification of effective elastic constants of composite shells on the basis of static and dynamic experiments," Izv. AN. MTT [Mechanics of Solids], No. 3, pp. 12-20, 1998.
14.  E. A. Leonova, "On ill-posed static problems in elasticity," Izv. AN. MTT [Mechanics of Solids], No. 6, pp. 71-77, 1997.
15.  I. Yu. Tsvelodub, "To the determination of stiffness characteristics of a physically nonlinear inclusion in a linearly elastic medium," Zh. Prikl. Mekhaniki i Tekhn. Fiziki, Vol. 41, No. 4, pp. 178-184, 2000.
16.  V. G. Yakhno, Inverse Problems for Differntial Equations of Elasticity [in Russian], Nauka, Novosibirsk, 1990.
17.  K. P. Alekseev, R. A. Kayumov, I. G. Teregulov, and I. Kh. Fakhrutdinov, "Mechanical characteristics of organo- and carbon-plastic tubes manufactured by using cross winding," Mekhanika Kompozitsionnykh Materialov i Konstruktsii, Vol. 4, No. 4, pp. 3-20, 1998.
18.  V. V. Vasil'ev, Mechanics of Structures Made of Composite Materials [in Russian], Mashinostroenie, Moscow, 1998.
Received 25 June 2001
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