 | | Mechanics of Solids
A Journal of Russian Academy of Sciences | | Founded
in January 1966
Issued 6 times a year
Print ISSN 0025-6544
Online ISSN 1934-7936 |
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| Yu.V. Petrov, I.V. Smirnov, and A.A. Utkin, "Effects of Strain-Rate Strength Dependence in Nanosecond Load Duration Range," Mech. Solids. 45 (3), 476-484 (2010) |
| Year |
2010 |
Volume |
45 |
Number |
3 |
Pages |
476-484 |
| DOI |
10.3103/S0025654410030179 |
| Title |
Effects of Strain-Rate Strength Dependence in Nanosecond Load Duration Range |
| Author(s) |
Yu.V. Petrov (St.-Petersburg State University, Research Center of Dynamics, Universitetskiy pr-t 28, Petergof, St. Petersburg, 198504 Russia, yp@yp1004.spb.edu)
I.V. Smirnov (St.-Petersburg State University, Research Center of Dynamics, Universitetskiy pr-t 28, Petergof, St. Petersburg, 198504 Russia, ivansmirnov@math.spbu.ru)
A.A. Utkin (Institute for Problems in Mechanical Engineering, Russian Academy of Sciences, Bol'shoy pr-t 61, St. Petersburg, 199178 Russia, a.utkin51@gmail.com) |
| Abstract |
On the basis of the structural-temporal approach, we explain the rapid increase in the spall strength and its stabilization in the nanosecond range of load duration, observed in several experiments. We give a detailed presentation of the method for describing the time-dependence of the spall strength. We obtain a qualitative coincidence of the computational curves and the experimental data and show that the strength significantly depends on the pulse parameters. An analysis of the obtained results allows us to conclude that it is incorrect to introduce a limit stress as the material "dynamic" strength by analogy with equilibrium processes; it is necessary to use the strength structural-temporal characteristics instead. |
| Keywords |
dynamic fracture, pulse load, spall, strength dependence on the strain rate, incubation processes |
| References |
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|
| Received |
18 January 2010 |
| Link to Fulltext |
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