Axisymmetric thermoelastic contact of an FGM-coated half-space under a rotating punch

Liu, Jing; Ke, Liao-Liang; Zhang, Chuanzeng

doi:10.1007/s00707-021-02940-7

Cited by 15 publications

(4 citation statements)

References 40 publications

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“…At the same time, it should be noted that the peculiarity of the method proposed in the current work and implemented, in contrast to [1][2][3][4][5][6][7][8][9], is the interconnectedness of individual stages of research. In addition, building on models [28][29][30][31][32][33][34], real, and not model, characteristics of materials of intermediate layers between contacting bodies were considered. This created objective conditions for achieving world-class results of the technical characteristics of the designed turbo-expander units.…”

Section: Discussion Of Results Of Studying Turbo-expander Installationsmentioning

confidence: 99%

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Substantiating promising technical solutions for turbo- expander power plants based on the research into working processes and states

Tkachuk,

Lvov,

Kravchenko

et al. 2023

EEJET

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One of the most rational methods of energy utilization of compressed gas in pipelines is to use turbo-expander installations. In particular, these are autonomous turbo-expander power stations. A fundamentally new concept has been devised to improve the technical and economic performance of this type of machines. This concept is not focused on a separate aspect of the plant's operation but on their entire set. In particular, physical principles, structures, and technologies were considered as an object of research. First, effective parameters of gas-dynamic flows and heat-mass transfer were determined based on the modeling of work processes. Secondly, progressive designs of turbo-expander units have been created. Thirdly, technologies for the production of parts and assemblies of turbo-expander units have been developed, which combine, unlike the traditional ones, different types of strengthening for contacting parts in their pair. A method of parametric modeling was used to substantiate the technical solutions of the elements of turbo-expander power plants. This makes it possible to determine the technical characteristics of these installations under a certain set of parameters. By purposeful variation, a recommended set of their parameters was determined, which ensure the improvement of the most important technical characteristics. A specialized database was built, which contains an array of information about the regularities of the influence of variation of significant parameters on various characteristics of turbo-expander power plants. Already on this basis, the problems of synthesis of successful technical solutions of turbo-expander power plants are solved. As a result, their high energy efficiency is ensured. Thus, the efficiency of the expander was achieved at the level of 86 % while the resource increased by 20–25 %. All these solutions were implemented in a number of unique turbo-expander units. Their effectiveness has been demonstrated during operation

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Section: Discussion Of Results Of Studying Turbo-expander Installationsmentioning

confidence: 99%

“…In particular, these and a number of other works describe constructed models of surface layers [29,30]. Various models can be used to analyze the stressed-strained state of such a composition [31,32]. These models are based on different approaches [33].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Substantiating promising technical solutions for turbo- expander power plants based on the research into working processes and states

Tkachuk,

Lvov,

Kravchenko

et al. 2023

EEJET

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“…Research shows that controlling the gradient parameter of FGM can reduce residual tensile stress and improve thermal shock resistance [23]. Many computational models have been recently developed to evaluate the thermal response of FGMs, which is crucial for predicting failure mechanisms and designing friction couples [24][25][26][27][28][29][30][31][32][33]. Comprehensive reviews of the literature on thermal and thermoelastic problems of friction for functionally graded materials are given in our previous articles [34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Effect of Convective Cooling on the Temperature in a Friction System with Functionally Graded Strip

et al. 2023

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An exact solution of the boundary-value problem of heat conduction was obtained with consideration of heat generation due to friction and convective cooling for the strip/semi-space system. Analytical solutions to this problem are known for the case with both friction elements made of homogeneous materials or a composite layer with a micro-periodic structure. However, in this study, the strip is made of a two-component functionally gradient material (FGM). In addition, the exact, asymptotic solutions were also determined at small and large values of the Fourier number. By means of Duhamel’s theorem, it was shown that the developed solution for a constant friction power allows to obtain appropriate solutions with a changing time profile of this value during heating. Numerical analysis in dimensionless form was carried out for the FGM (ZrO2—Ti-6Al-4V) strip in combination with the cast iron semi-space. The influence of the convective cooling intensity (Biot number) on the temperature field in the considered friction system was investigated. The developed mathematical model allows for a quick estimation of the maximum temperature of systems, in which one of the elements (FGM strip) is heated on the friction surface and cooled by convection on the free surface.

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“…У багатьох сучасних публікаціях останнім часом багато уваги приділяється контактним задачам для функціонально-градієнтних матеріалів, які розв'зують у термопружній постановці [47], умовах адгезійної взаємодії [48], ортотропних тіл [49] тощо. У роботі [50] у стандартну модель Джонсона-Кендалла-Робертса було внесено урахування додаткового двовісного розтягу одного з тіл.…”

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Integrated Calculation and Experimental Technology for Analysis of Contact Interaction With Account of Elastic Intermediate Layer

Tkachuk,

Hrechka,

Tkachuk

et al. 2023

МіСАПР

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The work delivers solution to a relevant scientific problem of solid mechanics. It consists in developing theoretical basis for computational and experimental research of contact interaction of complex-shaped bodies with account for micromechanical models of roughness and other intermediate or surface layers. New methods and models have been developed for the analysis of contact interaction of complex-shaped bodies with account for the micromechanical properties of surface and intermediate layers characterized by nonlinear local contact stiffness. The developed methods and models as well as the numerical analysis tools have been applied to a series of model and applied problems. The deformation behaviour of novel materials with network microstructures of one-dimensional elements has been determined. Macroscopical properties of these materials have been evaluated based on the special microscopic models and the homogenization methods. Regularities in contact distribution and its dependence on geometrical and physical factors have been determined for various complexshaped bodies. New design solutions for machine elements that improve their strength and durability have been justified. The developed methods and analysis tools have been introduced into the design of new engineering products. Their implementation resulted in improved technical characteristics of protection, structural and functional elements of transport vehicles of special purpose, gear transmissions, technical equipment, hydrovolumetric drives and so on. The conducted computational and experimental studies showed good agreement with the real response of network materials and the observed behavior of interacting elastic bodies with intermediate contact layer. Keywords: solid mechanics, complex-shaped body, contact interaction, contact pressure, intermediate layer

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Axisymmetric thermoelastic contact of an FGM-coated half-space under a rotating punch

Cited by 15 publications

References 40 publications

Substantiating promising technical solutions for turbo- expander power plants based on the research into working processes and states

Substantiating promising technical solutions for turbo- expander power plants based on the research into working processes and states

Effect of Convective Cooling on the Temperature in a Friction System with Functionally Graded Strip

Integrated Calculation and Experimental Technology for Analysis of Contact Interaction With Account of Elastic Intermediate Layer

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