Meccanica
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Nonclassical axisymmetric bending of circular Mindlin plates with radial force
Meccanica - Tập 54 - Trang 1623-1645 - 2019
The classical analysis of bending of a circular plate subjected to transverse loading often neglects the effect of the radial component of the reaction force. This paper analyzes this effect for a moderately thick circular plate with roller constraint. A nonclassical axisymmetric bending problem of a circular Mindlin plate is studied for a concentrated force and uniformly distributed loading. The ...... hiện toàn bộ
Closed-form solutions and uncertainty quantification for gravity-loaded beams
Meccanica - Tập 51 - Trang 1465-1479 - 2015
Typically, the cantilever non-uniform gravity-loaded Euler–Bernoulli beams are numerically modeled as the governing equation for free vibration analysis does not yield an exact solution. We show that, for certain polynomial variations of the mass and stiffness, there exists a fundamental closed form solution to the fourth order governing differential equation for gravity-loaded beams. An inverse p...... hiện toàn bộ
Reliability for design of planetary gear drive units
Meccanica - Tập 49 - Trang 829-841 - 2013
Gear drive units are important components of technical systems (TS) and need to be of high quality. Planetary gear units are very compact and efficient mechanical power transformers, but further increase of operating quality level requires the application and development of the new design methodology. The subject of this contribution is presentation of Reliability for design as the new approach of...... hiện toàn bộ
Analysis of cavitation time effect on elastoplastic response of underwater rectangular plate subjected to impulsive loading
Meccanica - Tập 52 - Trang 317-332 - 2016
This paper focuses on the cavitation effect on nonlinear elastoplastic deformation rectangular aluminum plate subjected to underwater explosion loading. Cavitation is a phenomenon that may be occurred for plates in the process of underwater explosion forming. The total pressure of the explosion becomes zero at the cavitation time, so that the governing equations of motion will be different before ...... hiện toàn bộ
The limit state of indefinite plates on elastoplastic continuum
Meccanica - Tập 7 - Trang 117-123 - 1972
The limit analysis of indefinite plates resting on a continuous elastoplastic medium and subjected to a load distributed over a partial surface with a circular boundary yields the fundamental equation governing the problem. Minimum conditions are set and the solution that supplies the collapse load of the plate-soil system is found by variational calculus.
Free Vibrations of Cylindrical Shells with Non-Axisymmetric Mass Distribution on Elastic Bed
Meccanica - Tập 32 - Trang 71-84 - 1997
The free vibrations of circular cylindrical shells partiallyloaded by a distributed mass and rested on an elastic bed are studied in this paper. Both the mass-load and the elastic bed are assumed to be applied on limited arcs and with arbitrary distributions in circumferential direction,while they are considered to be uniformly distributed in longitudinaldirection on the entire shell length. There...... hiện toàn bộ
Active and passive controls of nanoparticles in Maxwell stagnation point flow over a slipped stretched surface
Meccanica - Tập 52 - Trang 1527-1539 - 2016
A steady stagnation-point flow of an incompressible Maxwell fluid towards a linearly stretching sheet with active and passive controls of nanoparticles is studied numerically. The momentum equation of the Maxwell nanofluid is inserted with an external velocity term as a result of the flow approaches the stagnation point. Conventional energy equation is modified by incorporation of nanofluid Browni...... hiện toàn bộ
Hele-Shaw flow with a small obstacle
Meccanica - Tập 49 - Trang 2037-2047 - 2014
Asymptotic analysis of the flow passing over a small obstacle in the Hele-Shaw cell is performed. The results are based on the asymptotic formulas for Green’s and Neumann functions recently obtained by Maz’ya and Movchan. Theoretical results are illustrated by the numerical simulations.
Modelling of nanobubbles at the liquid-solid interface in water and oil
Meccanica - Tập 56 - Trang 2517-2532 - 2021
A model based on molecular dynamics is suggested for description of the shape of nanobubble on the liquid-solid interface. The model results are in good agreement with the known experimental AFM measurements. Nanobubbles in water and in oil are studied. The evolution, moving and interactions of nanobubbles are considered. The influence of different external factors (temperature of the liquid, temp...... hiện toàn bộ
The effect of oil pressure and temperature on barrel film thickness and barrel dynamics of an axial piston pump
Meccanica - Tập 47 - Trang 639-654 - 2011
Efficiency improvement in piston pumps and motors is a major task in pump development. Just a small improvement in efficiency can have a significant financial impact, particularly on large manufacturing plants employing many large-power pumps. According to the bibliography, effort has been concentrated in studding slipper swash plate leakage, forces, torques and slipper dynamics, but less attentio...... hiện toàn bộ
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