Abstract
The report presents a study of the deformation and fracture of concrete under dynamic loads using the Kolsky method. Presented on the main technological method of manufacturing concrete samples for dynamic testing. The purpose of the test is to study the high-speed deformation and destruction of fine concrete. This article presents the results of tests of concrete for compression at deformation rates ranging from 4 · 102 s−1 to 2 · 103 s−1. The conducted dynamic test of fine concrete for compression consisted of 35 test shots. Concrete was tested at 7 different speeds. Each test mode consisted of 5 test shots. 3 modes were carried out using copper pulse shapers. Copper pulse shapers were used for research purposes. It is assumed that the pulse shaper improves the quality of the basic premise of the Kolsky method on the homogeneity of the intensely deformed state in a sample. The results of dynamic tests with pulse formers were compared with the results of tests without pulse formers. The verification of the uniformity of the stress-strain state in the sample is performed using the formula εI + εR = εT, where εI- is the incident pulse, εR- is the reflected pulse, εT- is the transmitted pulse.
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Acknowledgements
The method of manufacturing concrete samples for dynamic testing was developed with the financial support of the RFBR (grant 19-38-90225). The experimental investigations were supported by the grant of the Government of the Russian Federation (contract No. 14.Y26.31.0031).
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Bragov, A.M., Gonov, M.E., Lomunov, A.K., Balandin, V.V. (2020). Experimental Study of the Dynamic Properties of Concrete under Compressive Load. In: Abali, B., Giorgio, I. (eds) Developments and Novel Approaches in Nonlinear Solid Body Mechanics. Advanced Structured Materials, vol 130. Springer, Cham. https://doi.org/10.1007/978-3-030-50460-1_23
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DOI: https://doi.org/10.1007/978-3-030-50460-1_23
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