On the Development of Mechanothermodynamics as a New Branch of Physics

Sosnovskiy, Leonid A.; Sherbakov, Sergei

doi:10.3390/e21121188

Cited by 22 publications

(18 citation statements)

References 65 publications

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“…In unified mechanics theory [ 29 ], in addition to nodal displacements, the entropy generation rate is also necessary to relate microstructural changes in the material with spatial and temporal coordinates. This concept [ 29 ] has been successfully implemented for a wide range of materials and has been experimentally and mathematically validated and reported in literature [ 18 , 19 , 20 , 25 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 ]. The entropy generation rate of any material under any external disturbances like mechanical, thermal, electrical, chemical, radiation, and corrosion can be calculated from principles of physics, using the fundamental equation, with no need for curve fitting phenomenological models or polynomials fit to experimental test data.…”

Section: Introductionmentioning

confidence: 77%

Low Cycle Fatigue Life Prediction Using Unified Mechanics Theory in Ti-6Al-4V Alloys

Kumar

Rao

et al. 2019

Entropy

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Fatigue in any material is a result of continuous irreversible degradation process. Traditionally, fatigue life is predicted by extrapolating experimentally curve fitted empirical models. In the current study, unified mechanics theory is used to predict life of Ti-6Al-4V under monotonic tensile, compressive and cyclic load conditions. The unified mechanics theory is used to derive a constitutive model for fatigue life prediction using a three-dimensional computational model. The proposed analytical and computational models have been used to predict the low cycle fatigue life of Ti-6Al-4V alloys. It is shown that the unified mechanics theory can be used to predict fatigue life of Ti-6Al-4V alloys by using simple predictive models that are based on fundamental equation of the material, which is based on thermodynamics associated with degradation of materials.

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Section: Introductionmentioning

confidence: 77%

Low Cycle Fatigue Life Prediction Using Unified Mechanics Theory in Ti-6Al-4V Alloys

Kumar

Rao

et al. 2019

Entropy

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“…According to the generalized dissipation Lagrange principle, the vertical dynamic equation of the swing shaft can be expressed by Equation (12).…”

Section: Dynamic Analysis Of the Cof Machinementioning

confidence: 99%

“…In the dynamic analysis aspect, Sosnovskiy et al [12] substantiated and formulated the main principles of the physical discipline mechanothermodynamics that united Newtonian mechanics and thermodynamics. Li et al [13] carried out dynamic modal analysis of machine tool structures.…”

Section: Introductionmentioning

confidence: 99%

Static and Dynamic Analysis of a 6300 KN Cold Orbital Forging Machine

Chen

Wang

et al. 2020

Processes

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In cold orbital forging (COF) processes, large stress, displacement and vertical vibration of the COF machine are bad for the quality of the part and the fatigue life of the COF machine. It is necessary to investigate the static and dynamic performance of the COF machine and provide methods for reducing the stress, displacement and vertical vibration of the COF machine. In this paper, finite element analysis, theoretical analysis, numerical simulation and experimental analysis were applied to study the static and dynamic performance of a 6300 KN COF machine. The static and dynamic analyses were verified effectively by carrying out strain and vertical vibration test experiments. In the static analysis, the large stress and displacement positions of the COF machine were mainly distributed near the working table and the junction between the working table and the column. Large stress and displacement will be bad for the quality of the part and the fatigue life of the COF machine. Structural optimizations of the COF machine include ribbed plates on the working table and beam. This structural optimization method of the COF machine obviously reduced the stress and displacement of the COF machine. When the angular velocities of the eccentric rings were 8π rad/s, the vertical vibration of the swing shaft is a low-frequency vibration. The existence of absorber obviously reduced the vertical vibration of the COF machine.

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“…The unification of the laws of thermodynamics and Newtonian mechanics has been pursued by many scientists in the last century. The principles are based on using entropy as a bridge between mechanics and thermodynamics [ 2 ]. Mechanothermodynamics (MTD) combines two branches of physics—mechanics and thermodynamics—to study the evolution of complex systems.…”

Section: Introductionmentioning

confidence: 99%

Noise Reduction in Spur Gear Systems

Liguori

Armentani

Bertocco

et al. 2020

Entropy

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This article lists some tips for reducing gear case noise. With this aim, a static analysis was carried out in order to describe how stresses resulting from meshing gears affect the acoustic emissions. Different parameters were taken into account, such as the friction, material, and lubrication, in order to validate ideas from the literature and to make several comparisons. Furthermore, a coupled Eulerian–Lagrangian (CEL) analysis was performed, which was an innovative way of evaluating the sound pressure level of the aforementioned gears. Different parameters were considered again, such as the friction, lubrication, material, and rotational speed, in order to make different research comparisons. The analytical results agreed with those in the literature, both for the static analysis and CEL analysis—for example, it was shown that changing the material from steel to ductile iron improved the gear noise, while increasing the rotational speed or the friction increased the acoustic emissions. Regarding the CEL analysis, air was considered a perfect gas, but its viscosity or another state equation could have also been taken into account. Therefore, the above allowed us to state that research into these scientific fields will bring about reliable results.

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On the Development of Mechanothermodynamics as a New Branch of Physics

Cited by 22 publications

References 65 publications

Low Cycle Fatigue Life Prediction Using Unified Mechanics Theory in Ti-6Al-4V Alloys

Low Cycle Fatigue Life Prediction Using Unified Mechanics Theory in Ti-6Al-4V Alloys

Static and Dynamic Analysis of a 6300 KN Cold Orbital Forging Machine

Noise Reduction in Spur Gear Systems

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