A variational approach to the determination of the dynamic strength of a material
Evstifeev A.D.1,2, Volkov G.A. 2,3
1Research Institute of Mechanics, Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, Russia
2St. Petersburg State University, St. Petersburg, Russia
3Institute for Problems in Mechanical Engineering of the Russian Academy of Sciences, St. Petersburg, Russia
Email: ad.evstifeev@gmail.com, g.volkov@spbu.ru

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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.
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