Solids

A variational approach to the determination of the dynamic strength of a material

A. D. Evstifeev^ab, G. A. Volkov<sup>b

a</sup> Research Institute of Mechanics, N. Novgorod State University, 603600 Nizhny Novgorod, Russia
^b Saint Petersburg State University, 199034 St. Petersburg, Russia

Abstract: The problem of the determination of material strength properties through the Kolsky experimental technique is considered. Small size specimens of M1 copper alloy are tested on a split Hopkinson pressure bars equipment. The experimental data of tensile tests observed under both dynamic and quasi-static conditions are analysed within the framework of the incubation time criterion and the Sign-Perturbed Sums method. It is shown that the influence of a test performance error is considered in the data treatment procedure based on the developed method.

Keywords: dynamic strength, incubation time criterion, Kolsky bar system, Sign-Perturbed Sums method.

Received: 07.09.2021
Revised: 07.09.2021
Accepted: 08.11.2021

DOI: 10.21883/jtf.2022.02.52017.250-21

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