Abstract
Conventionally discussed dynamic mechanisms of elastic strain energy redistribution in near-contact surface regions include P and S elastic wave pulses radiating from the contact surface. At the same time, the elastic strain energy can be transferred by localized vortex-like elastic waves (Rayleigh, Love, Stoneley wave, and so on). In the paper, we numerically studied the main features of the formation and propagation of localized vortex-like waves in the surface layers under the contact zone. The study was done using the numerical method of movable cellular automata. We showed that the initial phase of dynamic contact interaction with a nonzero tangential component of contact velocity is accompanied by the formation of a so-called elastic vortex. The elastic vortex is a fully dynamic object, which is characterized by shear stress concentration and propagates at the shear wave speed. We first revealed the ability of the elastic vortex to propagate toward the bulk of the material and transfer elastic strain energy deep into the surface layer in a localized manner. We analyzed the dependence of the direction of vortex propagation on the tangential contact velocity, contact pressure and Young's modulus of the material. The results of the study are important for better understanding the dynamic mechanisms contributing to inelastic strain accumulation or gradual degradation of surface layers.
| Original language | English |
|---|---|
| Article number | 51 |
| Journal | Lubricants |
| Volume | 6 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 18 May 2018 |
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Keywords
- Contact interaction
- Discrete element method
- Dynamics
- Elastic vortex
- Elastic wave
- Modeling
- Stress concentration
ASJC Scopus subject areas
- Mechanical Engineering
- Surfaces, Coatings and Films
Cite this
The fundamental regularities of the evolution of elastic vortices generated in the surface layers of solids under tangential contact loading. / Shilko, Evgeny V.; Astafurov, Sergey V.; Grigoriev, Alexandr S.; Smolin, Alexey Yu; Psakhie, Sergey G.
In: Lubricants, Vol. 6, No. 2, 51, 18.05.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The fundamental regularities of the evolution of elastic vortices generated in the surface layers of solids under tangential contact loading
AU - Shilko, Evgeny V.
AU - Astafurov, Sergey V.
AU - Grigoriev, Alexandr S.
AU - Smolin, Alexey Yu
AU - Psakhie, Sergey G.
PY - 2018/5/18
Y1 - 2018/5/18
N2 - Conventionally discussed dynamic mechanisms of elastic strain energy redistribution in near-contact surface regions include P and S elastic wave pulses radiating from the contact surface. At the same time, the elastic strain energy can be transferred by localized vortex-like elastic waves (Rayleigh, Love, Stoneley wave, and so on). In the paper, we numerically studied the main features of the formation and propagation of localized vortex-like waves in the surface layers under the contact zone. The study was done using the numerical method of movable cellular automata. We showed that the initial phase of dynamic contact interaction with a nonzero tangential component of contact velocity is accompanied by the formation of a so-called elastic vortex. The elastic vortex is a fully dynamic object, which is characterized by shear stress concentration and propagates at the shear wave speed. We first revealed the ability of the elastic vortex to propagate toward the bulk of the material and transfer elastic strain energy deep into the surface layer in a localized manner. We analyzed the dependence of the direction of vortex propagation on the tangential contact velocity, contact pressure and Young's modulus of the material. The results of the study are important for better understanding the dynamic mechanisms contributing to inelastic strain accumulation or gradual degradation of surface layers.
AB - Conventionally discussed dynamic mechanisms of elastic strain energy redistribution in near-contact surface regions include P and S elastic wave pulses radiating from the contact surface. At the same time, the elastic strain energy can be transferred by localized vortex-like elastic waves (Rayleigh, Love, Stoneley wave, and so on). In the paper, we numerically studied the main features of the formation and propagation of localized vortex-like waves in the surface layers under the contact zone. The study was done using the numerical method of movable cellular automata. We showed that the initial phase of dynamic contact interaction with a nonzero tangential component of contact velocity is accompanied by the formation of a so-called elastic vortex. The elastic vortex is a fully dynamic object, which is characterized by shear stress concentration and propagates at the shear wave speed. We first revealed the ability of the elastic vortex to propagate toward the bulk of the material and transfer elastic strain energy deep into the surface layer in a localized manner. We analyzed the dependence of the direction of vortex propagation on the tangential contact velocity, contact pressure and Young's modulus of the material. The results of the study are important for better understanding the dynamic mechanisms contributing to inelastic strain accumulation or gradual degradation of surface layers.
KW - Contact interaction
KW - Discrete element method
KW - Dynamics
KW - Elastic vortex
KW - Elastic wave
KW - Modeling
KW - Stress concentration
UR - http://www.scopus.com/inward/record.url?scp=85047275546&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85047275546&partnerID=8YFLogxK
U2 - 10.3390/lubricants6020051
DO - 10.3390/lubricants6020051
M3 - Article
AN - SCOPUS:85047275546
VL - 6
JO - Lubricants
JF - Lubricants
SN - 2075-4442
IS - 2
M1 - 51
ER -