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Journal articles on the topic 'Thermo-stressed state'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 May 2022

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1

Goloshumova, V., and Yu Brodov. "The thermo-stressed state of Steam Turbine Rotors during plant start-up." International Journal of Energy Production and Management 1, no. 3 (2016): 245–52. http://dx.doi.org/10.2495/eq-v1-n3-245-252.

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2

Pulyaev, I. S., and S. M. Pulyaev. "ACCOUNTING OF THE OWN THERMO-STRESSED STATE OF THE SOLID CONCRETE WHILE PROVIDING THE REQUIRED CONSUMER PROPERTIES OF THE CRIMEAN BRIDGE CONSTRUCTIONS." Russian Automobile and Highway Industry Journal 15, no. 5 (2018): 742–59. http://dx.doi.org/10.26518/2071-7296-2018-5-742-759.

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Introduction.The paper deals with the issues related to the determination and registration of the own thermo-stressed state formed in concrete while hardening and used to provide the required consumer properties in the Crimean bridge construction. Therefore, the problem is relevant because of the deadlines for the construction of such facility in the conditions of rough terrain and dry hot climate, and also taking into account the development of the unique non-class facilities in Russia.Materials and methods.The research is carried out in real-time conditions with the usage of modern measuring

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3

Efimova, A. R., S. A. Vasilenko, and V. V. Bychkova. "CCP maneuverability increasing algorithm realized on DCS with the metal allowable thermo-stressed state provision." Journal of Physics: Conference Series 1679 (November 2020): 052010. http://dx.doi.org/10.1088/1742-6596/1679/5/052010.

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4

Zhang, Xiaolong, and Zheng Zhong. "Thermo-Chemo-Elasticity Considering Solid State Reaction and the Displacement Potential Approach to Quasi-Static Chemo-Mechanical Problems." International Journal of Applied Mechanics 10, no. 10 (2018): 1850112. http://dx.doi.org/10.1142/s1758825118501120.

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Engineering materials and structures represent complex behaviors when reacting to superposed influences of mechanical forces, high temperature, diffusion and reaction of chemicals, which could cause large internal stresses and further induce cracks or failure. To determine the material reliability and integrity, the multi-field interactions and stresses/strains evolutions need to be identified at first. We proposed a theory of thermo-chemo-elasticity considering solid state reactions between the solid phase and absorbed chemicals in a stressed-solid. Both diffusion–reaction induced chemical st

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5

Weng, Lu Qian, Hai Lin Cao, Pavel V. Krivenko, et al. "Modeling a Thermo-Stressed State of the Cast-in-Situ Low Carbon Footprint Alkali Activated Slag Cement Concrete Hardened under Hot Environment." Applied Mechanics and Materials 525 (February 2014): 482–90. http://dx.doi.org/10.4028/www.scientific.net/amm.525.482.

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Alkali activated slag cement concretes are low carbon footprint building mateirals, which can meet the requirements for sustainable development. The paper covers the results of modeling a thermo-stressed state of the cast-in-situ massive alkali activated slag cement concrete structure hardened under hot environment to meet the requirements for marine engineering application. The results show that alkali activated slag cement concretes have a substantially lower heat release than that of Portland, are suitable for cast-in-situ massive alkali activated slag cement concrete structure even under h

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6

Volkov, Ivan, Leonid Igumnov, Svetlana Litvinchuk, and Igor Vorobtsov. "Modeling dynamic deformation and failure of thin-walled structures under explosive loading." EPJ Web of Conferences 183 (2018): 03016. http://dx.doi.org/10.1051/epjconf/201818303016.

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In the framework of mechanics of damaged media, behavior of thin-walled structures under pulsed loading is described. Account is taken of the interaction of the processes of dynamic deformation and damage accumulation, as well as of the main characteristic features of the dynamic failure process: the multi-staged character, nonlinear summation of damage, stressed state history and accumulated damage level. The chosen system of equations of thermo-plasticity describes the main effects of dynamic deformation of the material for random deformation trajectories. The equations of state are based on

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7

Gaidaichuk, Viktor, Liudmyla Shevchuk, and Olena Bilobrytska. "Influence of incompatibility of thermomechanical parameters of bearing layers of a bridge structure on its thermo-stressed state." Strength of Materials and Theory of Structures, no. 107 (October 29, 2021): 301–11. http://dx.doi.org/10.32347/2410-2547.2021.107.301-311.

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On the basis of the theory of thermoelasticity, the problem of the thermally stressed state of a two-layer fragment of a bridge structure, consisting of a metal base and an asphalt-concrete upper layer, under conditions of a change in the ambient temperature at different values of the coefficients of thermal linear expansion of the layers is considered. Using the finite element method, the fields of thermal stresses, deformations and displacements are constructed for various values of the thermomechanical characteristics of the layers. The analysis of the influence of the values of thermomecha

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8

Semenov, Kirill, and Yuri Barabanshchikov. "Thermal Cracking Resistance in Massive Concrete Structures in the Winter Building Period." Applied Mechanics and Materials 725-726 (January 2015): 431–41. http://dx.doi.org/10.4028/www.scientific.net/amm.725-726.431.

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The article deals with issues of the thermal cracking resistance in massive concrete and reinforced concrete structures during the building period. The paper lists the calculation results of the NPP reactor foundation mat thermal stressed state and thermal cracking resistance. The research also considers the concrete hardening temperature influence on its thermo-physical and deformation characteristics. The deformation criterion is used to calculate the concrete thermal cracking resistance. In addition, the paper focuses on the assignment of safe concrete pouring technological parameters in th

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9

Serednytska, Kh I., and R. M. Martynyak. "Thermoelastic behavior of a bimaterial with interface crack filled with an incompressible fluid." Bulletin of Taras Shevchenko National University of Kyiv. Series: Physics and Mathematics, no. 1 (2019): 206–9. http://dx.doi.org/10.17721/1812-5409.2019/1.48.

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Thermo-stressed state of the bimaterial with the interfacial crack filled with an incompressible fluid is investigated. The bimaterial with zero Dundurs parameter is considered. The thermo-elastic problem is reduced to nonlinear systems of singular integro-differential equations for a temperature jump between the cracks faces and an opening crack. The pressure of the fluid is determined from the equation of the incompressible fluid. Using the method of successive approximations a numerical solution of the problem is constructed. The opening crack and temperature jump are determined by the fini

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10

Vorobiev, Yu, R. Rzadkowski, N. Ovcharova, and T. Berlizova. "Thermo-stressed state of a single-crystal cooled blade taking into account the axial orientation of the crystallographic axes." Bulletin of the National Technical University «KhPI» Series: Dynamics and Strength of Machines 1, no. 33 (2018): 18–22. http://dx.doi.org/10.20998/2078-9130.2018.33.151222.

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11

Kalynyak, B. M. "On some ways to achieve the absence of thermal stresses in an inhomogeneous through thickness infinite layer under stationary thermal loading." Bulletin of Taras Shevchenko National University of Kyiv. Series: Physics and Mathematics, no. 1 (2019): 66–69. http://dx.doi.org/10.17721/1812-5409.2019/1.14.

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A method for determining the characteristics of functional gradient materials (FGM) for providing zero thermal stresses in an infinite layer with given constant thermal loads is proposed. We assume that the classical convective conditions of heat transfer are given on the surfaces of the layer, the temperature field is stationary, the characteristics of the FGM are described by the model of a simple mixture, the characteristics of the thermo-stressed state and the material depend only on the transverse variable. Precise analytical expressions were obtained for the distribution of the concentra

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12

Kenzhegulov, Beket, Raigul Tuleuova, Aigul Myrzasheva, Nurgul Shazhdekeyeva, and Galymzhan Kabylkhamitov. "Mathematical modelling and development of a computational algorithm for the study of thermo-stressed state of a heat-resistant alloy." Periodicals of Engineering and Natural Sciences (PEN) 9, no. 4 (2021): 214. http://dx.doi.org/10.21533/pen.v9i4.2304.

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13

Kovalchuk, Vitalii, Artur Onyshchenko, Olexander Fedorenko, et al. "A comprehensive procedure for estimating the stressed-strained state of a reinforced concrete bridge under the action of variable environmental temperatures." Eastern-European Journal of Enterprise Technologies 2, no. 7 (110) (2021): 23–30. http://dx.doi.org/10.15587/1729-4061.2021.228960.

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This paper reports the full-scale experimental measurements of temperature distribution over the surfaces of bridges' steel-concrete beams under the influence of positive and negative ambient temperatures. It has been established that the temperature is distributed unevenly along the vertical direction of a bridge's steel-concrete beam. It was found that the metal beam accepted higher temperature values. The maximum registered temperature difference between a metal beam and a reinforced concrete slab at positive ambient temperatures was +9.0 °C, and the minimum temperature difference was −2.1

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14

GENG, QIAN, and YUEMING LI. "ANALYSIS OF DYNAMIC AND ACOUSTIC RADIATION CHARACTERS FOR A FLAT PLATE UNDER THERMAL ENVIRONMENTS." International Journal of Applied Mechanics 04, no. 03 (2012): 1250028. http://dx.doi.org/10.1142/s1758825112500287.

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A study on vibration and acoustic radiation characters of an isotropic rectangular thin plate under thermal environments is presented in this paper. It is assumed that thermal loads caused by thermal environments just change the structure stress state. Thermal stresses induced by uniform temperature rise of the plate are determined with the thermo-elastic theory. Then the stress state is used in the following dynamic analysis as a pre-stressed factor. It is observed that thermal loads influence the natural frequencies evidently, especially the fundamental natural frequency. The order of mode s

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15

Sato, Yuya, Yoshiaki Murakami, Igi Satoshi, and Nobuyuki Ishikawa. "Critical Conditions of Cold Cracking in High Strength Steel Weld Based on the Local Stress Distribution and Hydrogen Accumulation." Materials Science Forum 941 (December 2018): 153–57. http://dx.doi.org/10.4028/www.scientific.net/msf.941.153.

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In this study, the occurrence of cold cracking in high strength steel welds were investigated in terms of residual stress and hydrogen diffusion behavior. The y-groove weld cracking test of TS780MPa grade steel plate was conducted with intentionally introducing hydrogen into the shielding gas during the gas-metal arc welding (GMAW). Since local stress is one of the most important factors for the cold cracking, residual stress distribution in the weld joint was measured by the neutron diffraction using TAKUMI in J-PARC. The root region, which is usually the crack initiation site in the y-groove

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16

Semerak, M., N. Ferents, D. Kharyshyn, and S. Vovk. "MATHEMATICAL MODELING OF STRENGTH-DEFORMED CONDITION OF PIPE CONCRETE CONSTRUCTIONS AT SUSTAINABLE TEMPERATURE." Fire Safety 35 (February 26, 2020): 63–68. http://dx.doi.org/10.32447/20786662.35.2019.10.

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The mathematical modeling of the thermo-stressed state of pipe-concrete structures under conditions of stationary thermal conductivity is carried out. During the study, the most common structural type of TBC was selected and mathematical models of the stress-strain state of TBA under heating conditions were taken into account, taking into account their geometric dimensions and thermophysical characteristics of metal and concrete. The main feature of the TBC study is that the heat exchange in the structure, as well as the corresponding force response, are investigated independently of each othe

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17

Ukrayinets, Nataliia, Olena Murahovska, and Olha Prokhorova. "Solving a one mixed problem in elasticity theory for half-space with a cylindrical cavity by the generalized Fourier method." Eastern-European Journal of Enterprise Technologies 2, no. 7 (110) (2021): 48–57. http://dx.doi.org/10.15587/1729-4061.2021.229428.

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Designing and constructing underground structures for various purposes, such as tunnels, mines, mine workings, necessitate the development of procedures for calculating their strength and reliability. The physical model of such objects worth considering is a homogeneous isotropic half-space that contains an infinitely long hollow cylinder, located parallel to its border. One can explore problems related to the mechanics of deformable solids for such a multiply connected body. This paper reports the proofs of addition theorems for the basic solutions to the Lamé equation regarding the half-spac

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18

Kudaykulov, Anarbay, Erkin Arinov, Nurlybek Ispulov, Abdul Qadir, and Kalamkas Begaliyeva. "Numerical Study of a Thermally Stressed State of a Rod." Advances in Mathematical Physics 2019 (June 2, 2019): 1–9. http://dx.doi.org/10.1155/2019/8986010.

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This paper considers a new method based on the law of energy conservation for the study of thermo-stress-strain state of a rod of limited length with simultaneous presence of local heat fluxes, heat exchanges, and thermal insulation. The method allows determining the field of temperature distribution and the three components of deformations and stresses, as well as the magnitude of the rod elongation and the resulting axial force with an accuracy of satisfying the energy conservation laws. For specific initial data, all the sought-for ones are determined numerically with high accuracy. We foun

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19

Nedaivozov, A. V., and V. N. Afanasiev. "Experimental Investigation of the Operation Modes of a Flat Loop Heat Pipe." Mechanical Engineering and Computer Science, no. 1 (March 1, 2019): 1–12. http://dx.doi.org/10.24108/0119.0001448.

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The paper presents the experimentally investigated operation modes of a flat loop heat pipe (LHP). The LHP is an efficient heat transfer device operating on the principle of evaporation-condensation cycle and successfully applied in space technology, including cooling heat-stressed components of electronic devices and computer equipment.We have experimentally studied how design parameters of the vapor line and its coolant flow influence on the LHP operation mode and also have determined the causes for emerging oscillatory mode of the LHP operation at low heat load. The paper depicts the experi

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20

Litovchenko, V. G., I. P. Lisovskyy, Cor Claeys, et al. "Effect of Grown-In Defects on the Structure of Oxygen Precipitates in Cz-Si Crystals with Different Diameter." Solid State Phenomena 131-133 (October 2007): 405–12. http://dx.doi.org/10.4028/www.scientific.net/ssp.131-133.405.

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IR-spectroscopy with computer analysis of the shape of the Si-O absorption band, electron microscopy, X-rays diffraction and measurements of unsteady photoconductivity timedecay under band-to band excitation were used to investigate the influence of defects in different diameter (40 – 300 mm) Si ingots on the oxygen precipitation due to two-stage annealing (750 оС + 1050 оС). It is shown that large size Cz-Si ingots have a relatively low concentration of electrically active micro-defects, containing small (0.06 – 0.1 μm) dislocation loops. During thermal treatments this leads to the formation

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21

Sahabutdinova, Ljajsan, Oleg Smetannikov, and Gleb Ilyinykh. "DEVELOPMENT OF AN INTEGRATED METHOD OF CALCULATION OF THE STRESSED-DEFORMED STATE OF THE COMPOSITION SHELL IN THE PROCESS OF MANUFACTURE." Applied Mathematics and Control Sciences, no. 3 (September 30, 2019): 84–99. http://dx.doi.org/10.15593/2499-9873/2019.3.05.

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The paper discusses the key stages of developing an integrated methodology for predicting the stress-strain state of a sand-polymer mandrel-plastic shell system during heat treatment with the adaptation of experimentally determined viscoelastic characteristics of components in the CAE ANSYS Mechanical APDL package. The first stage solves the problem of determining the effective viscoelastic characteristics for the shell. Viscoelastic characteristics are determined on the basis of the developed complex experimental calculation method based on the solution of boundary quasistatic problems of the

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22

Dwivedi, Sharad K., Sahana Basu, Santosh Kumar, et al. "Enhanced antioxidant enzyme activities in developing anther contributes to heat stress alleviation and sustains grain yield in wheat." Functional Plant Biology 46, no. 12 (2019): 1090. http://dx.doi.org/10.1071/fp19016.

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Climatic variations along with a rise in temperature during the winter season impose severe heat stress during the anthesis stage of spring wheat, resulting in severe yield losses. The present study was conducted to evaluate the influence of heat stress on redox homeostasis in developing anthers and flag leaves of wheat. Five Indian bread wheat genotypes were studied under field conditions during the dry season, with two extreme sowing dates (timely and very late sown) to explore the effect of heat stress on anthesis stage. Results showed that elevated temperature during anthesis caused signif

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23

Zarubin, V. S., V. N. Zimin, A. N. Kuvyrkin, and I. Yu Savel’eva. "Thermo-Stressed State of a Hollow Polymer Dielectric Cylinder." Journal of Engineering Physics and Thermophysics, August 28, 2021. http://dx.doi.org/10.1007/s10891-021-02383-w.

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24

Александров, А. А., В. С. Зарубин, and В. Н. Зимин. "Thermo-Stressed State of the Shell of a Cylindrical Cryogenic Tank when it is Being Filled." Proceedings of Higher Educational Institutions. Маchine Building, no. 112 (April 2016). http://dx.doi.org/10.18698/0536-1044-2016-4-5-15.

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25

Wassing, B. B. T., T. Candela, S. Osinga, et al. "Time-dependent Seismic Footprint of Thermal Loading for Geothermal Activities in Fractured Carbonate Reservoirs." Frontiers in Earth Science 9 (September 14, 2021). http://dx.doi.org/10.3389/feart.2021.685841.

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This paper describes and deploys a workflow to assess the evolution of seismicity associated to injection of cold fluids close to a fault. We employ a coupled numerical thermo-hydro-mechanical simulator to simulate the evolution of pressures, temperatures and stress on the fault. Adopting rate-and-state seismicity theory we assess induced seismicity rates from stressing rates at the fault. Seismicity rates are then used to derive the time-dependent frequency-magnitude distribution of seismic events. We model the seismic response of a fault in a highly fractured and a sparsely fractured carbona

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26

Gracheva, Lyudmila Ivanovna. "Predicting performance of a thermal shield of a spacecraft in a high-temperature gas flow." Journal of Mechanical Engineering Research 2, no. 1 (2019). http://dx.doi.org/10.30564/jmer.v2i1.763.

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A fundamental understanding of the mechanism of material interaction with a medium is based on correspondence between experimental studies and actual operating conditions of a given model or a structure. We estimated performance of thermal shield structures based on computations brought about considering physical properties of materials obtained under conditions simulating re-entry of a spacecraft into the atmosphere.A thermal shield is considered of a layered type shell, made of fiber glass with phenol-phormaldehide matrix. Both elastic and thermo-physical characteristics are varied depending

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27

Hoshi, Daisuke, Isao Nakamura, and Masao Isomura. "Poly-crystalline Ge thin films prepared by RF sputtering method for thermo photo voltaic application." MRS Proceedings 862 (2005). http://dx.doi.org/10.1557/proc-862-a6.5.

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AbstractThe poly crystalline Ge films were prepared by the RF sputtering method with Ar and Ar-H2 mixture gases. The crystallization temperature increases from 400 °C to 500 °C due to the H2 introduction into the sputtering gases. On the other hand, the H2 introduction decreases the absorption coefficients in the long wavelength region corresponding to lower energy values than the energy gap of Ge, although much higher absorption coefficients are observed in the case of the Ar sputtering. Probably, the gap state density decreases due to the hydrogen termination of dangling-bonds in the grain-b

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28

Abd Elbar, Ola H., Amr Elkelish, Gniewko Niedbała та ін. "Protective Effect of γ-Aminobutyric Acid Against Chilling Stress During Reproductive Stage in Tomato Plants Through Modulation of Sugar Metabolism, Chloroplast Integrity, and Antioxidative Defense Systems". Frontiers in Plant Science 12 (18 жовтня 2021). http://dx.doi.org/10.3389/fpls.2021.663750.

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Despite the role of γ-aminobutyric acid (GABA) in plant tolerance to chilling stress having been widely discussed in the seedling stage, very little information is clear regarding its implication in chilling tolerance during the reproductive stage of the plant. Here, we investigated the influence of GABA (1 and 2mM) as a foliar application on tomato plants (Solanum lycopersicum L. cv. Super Marmande) subjected to chilling stress (5°C for 6h/day) for 5 successive days during the flowering stage. The results indicated that applied GABA differentially influenced leaf pigment composition by decrea

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