Key role of elastic vortices in the initiation of intersonic shear cracks; Physical Review E; Vol. 91, iss. 6
| Parent link: | Physical Review E: Scientific Journal.— , 1993- Vol. 91, iss. 6.— 2015.— [063302] |
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| Korporace: | , |
| Další autoři: | , , , |
| Shrnutí: | Title screen Using the particle-based method of movable cellular automata, we analyze the initiation and propagation of intersonic mode II cracks along a weak interface. We show that the stress concentration in front of the crack tip, which is believed to be the mechanism of acceleration of the crack beyond the speed of shear waves, is due to the formation of an elastic vortex. The vortex develops in front of the crack during the short initial period of crack propagation. It expands and moves away from the crack tip and finally detaches from it. Maximum stress concentration in the vortex is achieved at the moment of detachment of the vortex. The crack can accelerate towards the longitudinal wave speed if the magnitude of shear stresses in the elastic vortex reaches the material shear strength before vortex detachment. We have found that for given material parameters, the condition for the unstable accelerated crack propagation depends only on the ratio of the initial crack length to its width (e.g., due to surface roughness). Режим доступа: по договору с организацией-держателем ресурса |
| Jazyk: | angličtina |
| Vydáno: |
2015
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| Témata: | |
| On-line přístup: | http://dx.doi.org/10.1103/PhysRevE.91.063302 |
| Médium: | Elektronický zdroj Kapitola |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=645395 |
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| 200 | 1 | |a Key role of elastic vortices in the initiation of intersonic shear cracks |f S. G. Psakhie [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 23 tit.] | ||
| 330 | |a Using the particle-based method of movable cellular automata, we analyze the initiation and propagation of intersonic mode II cracks along a weak interface. We show that the stress concentration in front of the crack tip, which is believed to be the mechanism of acceleration of the crack beyond the speed of shear waves, is due to the formation of an elastic vortex. The vortex develops in front of the crack during the short initial period of crack propagation. It expands and moves away from the crack tip and finally detaches from it. Maximum stress concentration in the vortex is achieved at the moment of detachment of the vortex. The crack can accelerate towards the longitudinal wave speed if the magnitude of shear stresses in the elastic vortex reaches the material shear strength before vortex detachment. We have found that for given material parameters, the condition for the unstable accelerated crack propagation depends only on the ratio of the initial crack length to its width (e.g., due to surface roughness). | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t Physical Review E |o Scientific Journal |d 1993- | ||
| 463 | |t Vol. 91, iss. 6 |v [063302] |d 2015 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a межзвуковые трещины | |
| 701 | 1 | |a Psakhie |b S. G. |c physicist |c head of laboratory, Advisor to the rector, head of Department, Tomsk Polytechnic University, doctor of physico-mathematical Sciences |f 1952- |g Sergey Grigorievich |3 (RuTPU)RU\TPU\pers\33038 | |
| 701 | 1 | |a Shilko |b E. V. |c physicist |c engineer of Tomsk Polytechnic University, Doctor of physical and mathematical sciences |f 1973- |g Evgeny Viktorovich |3 (RuTPU)RU\TPU\pers\35909 | |
| 701 | 1 | |a Popov |b M. |c physicist |c assistant at Tomsk Polytechnic University |f 1987- |g Mikhail |3 (RuTPU)RU\TPU\pers\36018 | |
| 701 | 1 | |a Popov |b V. L. |c physicist |c leading researcher of Tomsk Polytechnic University, Doctor of physical and mathematical sciences |f 1959- |g Valentin Leonidovich |3 (RuTPU)RU\TPU\pers\35915 | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет (ТПУ) |b Институт физики высоких технологий (ИФВТ) |b Кафедра физики высоких технологий в машиностроении (ФВТМ) |3 (RuTPU)RU\TPU\col\18687 |
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