PSI - Issue 28

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Author name / Structural Integrity Procedia 00 (2019) 000–000

L.A. Igumnov et al. / Procedia Structural Integrity 28 (2020) 1909–1917

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Fig. 7. Theoretical and experimental relations of the maximum circumferential strain of metal-plastic shells as functions of the specific explosive load: (–––) – calculation results; □ experimental results (Ivanov (1992)) (the open symbols – the shell did not fail, filled ones – partial or full failure). 4. Conclusion Calculation models allowing one to analyze the processes of progressive failure of pulse-loaded metal-plastic cylindrical shells of revolution both with account of the strain rate dependence of their strength characteristics (dynamic model) and with constant characteristics (static model) have been proposed. A comparative analysis of calculation results with experimental data testifies their better agreement in dynamic model. For various reinforcement schemes of composite macrolayer, the qualitative differences in character and size of failure zones calculated by both the methods were revealed. The results obtained can be used in the design and evaluation of the dynamic strength of load-carrying elements. Acknowledgements The deformation model was developed under financial support of the Ministry of Science and Higher Education of the Russian Federation (task 0729-2020-0054), the development of the failure model was financed by a grant from the Government of the Russian Federation (contract No. 14.Y26.31.0031). References Aseev, A.V., Gorshkov, N. N., Demeshkin, A. G., Makarov, G. E., Plastinin, A. V., Sil’vestrov, V. V., Stepanenko, S. V., 1992. Experimental investigation of the deformability of fiberglass and organic plastics as a function of strain rate [in Russian]. Mechanics of Composite Materials 2, 188-195. Korobkov, A. A., Alatortsev, A. I., Girin, Yu. V., Ostrik, A. V., Smirnov, D. V., Cheprunov, A. A., 2014 .Unsteady deformation and fracture of composite shells under thermal force loading. Global. Nauch. Potents 39 (6), 37-49. Shokrieh, M. M., Karamnejad, A. A., 2014. Investigation of strain rate effects on the dynamic response of a glass/epoxy composite plate under blast loading by using the finite-difference method. Mechanics of Composite Materials 50 (3), 295-310. Fedorenko, A. G., Syrunin, M. A., Ivanov, A. G., 2005. Criteria for choosing composite materials for shell structures localizing the explosion (review). FGiV 41, No.5, 3-13. Abrosimov, N. A., Bazhenov, V. G., 2002. Nonlinear Problems of Dynamics of Composite Structures [in Russian], N. Novgorod: Publ. house NNGU, pp. 400. Aseev, A.V., Makarov, G. E., Stepanenko, S. V., 1992. An experimental study of the dynamic behavior of tubular samples of fiber composite materials at the limit of their bearing capacity. Prikl. Mekh. Tekhn. Phys. 3, 140-147.