B. V. Sheptunov

Bio: B. V. Sheptunov is an academic researcher from Russian Academy of Sciences. The author has contributed to research in topics: Deformation (meteorology). The author has an hindex of 1, co-authored 1 publications receiving 10 citations.

Contact problem of die regular relief motion over viscoelastic base

Abstract: The numerical and analytical model is constructed to calculate the deformation friction force component when the regular relief die moves over the viscoelastic base, which is modeled with the Kelvin body with the relation time spectrum. The developed friction model is applicable to both the discrete and full contact between interacting surfaces. The die regular relief is modeled with a set of surface points. The results obtained with the developed model are compared for the case of full contact with the analytic calculation. The sliding velocity and the die regular relief shape are studied to identify the influence on the contact characteristics and the deformation componentof the coefficient of friction.

Contact problems for textured surfaces involving frictional effects

Abstract: This review is mainly concerned with investigations devoted to periodic contact problems involving frictional effects, which were carried out by scientists from the former Soviet Union and CIS countries. The following class of problems is considered: 2D and 3D problems of frictional sliding contact between elastic and viscoelastic bodies with regular relief; stick-slip contact of bodies with wavy and periodically grooved surfaces; thermoelastic interaction between bodies with regular relief with regard for frictional heating; sliding contact between a surface with regular relief and a viscoelastic layer bonded to a rigid or an elastic foundation; effect of adhesion or incompressible fluid in the gaps on contact parameters in sliding contact between a textured surface and a viscoelastic layer.

Adhesion effect in sliding of a periodic surface and an individual indenter upon a viscoelastic base

Abstract: Solutions of two three-dimensional contact problems for a linearly viscoelastic foundation in sliding contact with a separate indenter and a periodic wavy surface taking into account adhesion are p...

Development of Discrete Contact Mechanics with Applications to Study the Frictional Interaction of Deformable Bodies

Abstract: The paper presents a review of the current state of research in the field of discrete contact mechanics, including the main approaches to the formulation of problems, methods of analytical and numerical solution, the results, and the field of their practical use. It is intended for specialists in contact mechanics and tribology and may also be useful to researchers interested in controlling the interaction of deformable bodies due to the engineering of their surfaces.

Modeling Sliding Friction of a Multiscale Wavy Surface over a Viscoelastic Foundation Taking into Account Adhesion

Abstract: A model for calculating the hysteretic friction force for a multilevel wavy surface sliding in dry conditions over the surface of a viscoelastic foundation is suggested, taking into account adhesion force acting in the direction normal to the contact surface. At each scale level, the contact problem for a 3D periodic wavy indenter is solved by using the strip method to reduce the problem to 2D formulation in a strip. Different regimes of contact and adhesion interaction are possible in each strip, including partial and saturated contact. The friction force is calculated as a sum of two terms. The first term is due to hysteretic losses occurring when asperities of this scale level cyclically deform the viscoelastic foundation during sliding. The second term is the law of friction determined from the solution of the contact problem at the inferior scale level. For the case of a two-level wavy surface, the contribution of both levels into the total friction force is calculated and analyzed depending on the sliding velocity and specific energy of adhesion of the contacting surfaces.