 | | 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 |
Archive of Issues
| Total articles in the database: | | 12804 |
| In Russian (Èçâ. ÐÀÍ. ÌÒÒ): | | 8044
|
| In English (Mech. Solids): | | 4760 |
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| Petrov Yu.V. and Utkin A.A., "Failure-Delay Effect under Influence Pulse Dynamic Loads," Mech. Solids. 57 (1), 75-85 (2022) |
| Year |
2022 |
Volume |
57 |
Number |
1 |
Pages |
75-85 |
| DOI |
10.3103/S0025654422010125 |
| Title |
Failure-Delay Effect under Influence Pulse Dynamic Loads |
| Author(s) |
Petrov Yu.V. (Institute for Problem in Mechanical Engineering of RAS, St. Petersburg, 199178 Russia, y.v.petrov@spbu.ru)
Utkin A.A. (St. Petersburg University, St. Petersburg 199034, Russia, a.utkin51@gmail.com) |
| Abstract |
An analytical analysis of the failure-delay effect of a material with a crack under shock-wave pulse action is given. The effect is expressed via the possibility of material failure at the crack tip at the moment of time following the moment when the local breaking stress reaches its maximum value. A number of important features of dynamic fracture under threshold and overthreshold actions, observed in various experiments, are discussed. It has been found that the experimentally obtained failure delay has a clear explanation within the framework of the structural-temporal approach based on the concept of the incubation time of fracture. The conditions for delay occurrence are found and the corresponding analytical formulas are given. It is concluded that it is essential for study threshold cases in which the most important time effects appear. Such effects do not fit into the classical concepts of strength and crack resistance and are based on local ultimate stress and/or critical intensity factor. |
| Keywords |
dynamic fracture, cracks, pulse load, rate dependence of strength, fracture delay |
| Received |
24 April 2021 | Revised |
26 April 2021 | Accepted |
29 April 2021 |
| Link to Fulltext |
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