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Journal articles on the topic 'Thermo-stress-strain state'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

.Vignesh, K., and M. .Anbalagan. "Investigation of Mechanical Properties of Composite Materials Reinforced with Carbon Fibers." International Scientific Journal of Engineering and Management 04, no. 04 (2025): 1–9. https://doi.org/10.55041/isjem02832.

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Theoretical and experimental methods for obtaining and investigating effective thermo-mechanical characteristics - residual stresses and deformation in panels made of nanomodified materials with asymmetrical reinforcement scheme have been developed in this paper. The study of the residual stress-strain state of structural elements made of carbon plastic using the values of thermo elastic characteristics of composite mono layers identified on the basis of the developed methods made it possible to reveal the possibility of reducing the residual stress-strain state in structures with asymmetric r

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2

Lee, Hee Jong, Jung Han Song, and Hoon Huh. "Dynamic Tensile Tests of Auto-Body Steel Sheets with the Variation of Temperature." Solid State Phenomena 116-117 (October 2006): 259–62. http://dx.doi.org/10.4028/www.scientific.net/ssp.116-117.259.

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This paper is concerned with the thermo-mechanical behavior of steel sheet for an autobody including the temperature dependent strain-rate sensitivity. Tensile tests have been carried out with the high strength steel sheets such as SPRC35R, SPRC45E and TRIP60. The tensile tests were performed with the variation of the strain-rates from 0.001/s to 200/s and with the variation of environmental temperatures from -40 to 200. The thermo-mechanical response at the quasi-static state is obtained with the static tensile test and the one at the intermediate strain-rate is obtained with the high speed t

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3

Veljic, Darko, Marko Rakin, Bojan Medjo, Mihailo Mrdak, and Aleksandar Sedmak. "Temperature fields in linear stage of friction stir welding: Effect of different material properties." Thermal Science 23, no. 6 Part B (2019): 3985–92. http://dx.doi.org/10.2298/tsci181015264v.

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Friction stir welding is one of the procedures for joining the parts in solid state. Thermo-mechanical simulation of the friction stir welding of high-strength aluminium alloys 2024 T3 and 2024 T351 is considered in this work. Numerical models corresponding to the linear welding stage are developed in Abaqus software package. The material behaviour is modelled by Johnson-Cook law (which relates the yield stress with temperature, strain and strain rate), and the Arbitrary Lagrangian-Eulerian technique is applied. The difference in thermo-mechanical behaviour between the two materials has been a

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4

Li, Xueyang, Christian C. Roth, Vincent Grolleau, and Dirk Mohr. "An Engineering Approximation on the Transformation of Plastic Work into Heat at Various Strain Rates and Stress States." MATEC Web of Conferences 408 (2025): 02017. https://doi.org/10.1051/matecconf/202540802017.

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Accurate estimation of plastic work conversion into heat is crucial for analyzing metals under dynamic deformation. This study investigates DP800 sheet metal specimens across nine strain rates (0.001/s to 150/s) using notched tension (NT) and shear (SH) specimens to explore stress-state effects. Surface strain fields are monitored via digital image correlation (DIC) using a high-speed optical camera, while temperature rise due to plastic dissipation is measured using a high-speed infrared camera. A temperature rise of 170K is observed at 150/s, with minimal rise at 0.001/s. A Hill′48 yield sur

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Boucly, Vincent, Daniel Ne´lias, Shuangbiao Liu, Q. Jane Wang, and Leon M. Keer. "Contact Analyses for Bodies With Frictional Heating and Plastic Behavior." Journal of Tribology 127, no. 2 (2005): 355–64. http://dx.doi.org/10.1115/1.1843851.

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The stress field within machine components is an important indicator for contact failures. Since both thermal stresses due to frictional heating and plasticity are significant in engineering application, it is critical to predict the total stress field. In this work, the steady-state thermal effect is considered and a thermo-elastic–plastic contact model is developed. The model is applicable for rolling and/or sliding contact problem, as far as small equivalent plastic strain hypothesis is respected. Influence coefficients for surface normal displacement, temperature, and strain and stress ten

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6

Marina, Vasile, and Viorica Marina. "DETERMINATION OF THERMOREOLOGICAL CHARACTERISTICS AT MICROSCOPIC SCALE FROM EXPERIENCES ON THIN WALL TUBES." Journal of Engineering Science XXV (2) (June 15, 2018): 30–37. https://doi.org/10.5281/zenodo.2559352.

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The relationships between the module of stress and strain tensor deviator, in the case of thermorheological processes, are modeled by using the structural model. It is shown that sub-element properties can be determined from some experiences on thin walls tubes loaded with axial forces and interior pressure. Because the constants and material functions for this material are unknown the loaded conditions with constant state parameters are required. If the stretching process is produced with a constant speed of axial strain for each material there is one constant report among axial and circumsta

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7

Senchenkov, I. K., M. V. Jurzhenko, O. P. Chervinko, and O. V. Dolia. "Numerical simulation of the thermo-stress-strain state of elements under 3D printing." Bulletin of Taras Shevchenko National University of Kyiv. Series: Physics and Mathematics, no. 4 (2021): 70–75. http://dx.doi.org/10.17721/1812-5409.2021/4.11.

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The paper is devoted to the assessment of the thermo-stress-strain state of elements of structures obtained by 3D printing using FDM (Fusing Deposition Modeling) technology. Three stages of solving this problem are considered: (1) - mathematical formulation of the problem, that includes universal balance relations, constitutive equations of mechanical behavior of the material and is based on the model of growing bodies; (2) the technique of finite-element solution with increasing mesh due to the addition of new elements; (3) - study of a specific problem of growing plate-like element by polyme

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8

Vaghefi, Reza, MR Hematiyan, and Ali Nayebi. "Three-dimensional thermo-mechanical analysis of continuous casting and comparison with two-dimensional models." Journal of Strain Analysis for Engineering Design 53, no. 6 (2018): 421–34. http://dx.doi.org/10.1177/0309324718780131.

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In this study, a three-dimensional thermo-elasto-plastic model is developed for simulating a continuous casting process. The obtained results are compared with those from different two-dimensional analyses, which are based on plane stress, plane strain, and generalized plane strain assumptions. All analyses are carried out using the meshless local Petrov–Galerkin method. The effective heat capacity method is employed to simulate the phase change process. The von Mises yield criterion and elastic–perfectly-plastic model are used to simulate the stress state during the casting process; while, ma

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9

An, Feng Hui, Yu Hui Sha, and Liang Zuo. "Flow Behavior of Fe-3%Si Steel at High Temperatures and Strain Rates." Materials Science Forum 704-705 (December 2011): 928–34. http://dx.doi.org/10.4028/www.scientific.net/msf.704-705.928.

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Hot deformation behavior of Fe-3%Si steel within temperature range of 1073~1473K and strain rate range of 0.01~5s−1was investigated by isothermal compression test using thermo-simulation method. Over the applied deformation conditions, steady state flow behavior was well described by the power law relationship with dislocation climb as the rate-controlling mechanism, and the high apparent activation energy can be attributed to the high yield stress. A modified Bergström model was proposed by introducing yield stress, and consequently the whole stress-strain curves can be accurately predicted.

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Kreyca, Johannes, and Ernst Kozeschnik. "Flow Stress Modelling and Microstructure Development during Deformation of Metallic Materials." Materials Science Forum 892 (March 2017): 44–49. http://dx.doi.org/10.4028/www.scientific.net/msf.892.44.

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A constant strain hardening rate is characteristic for large strain deformation at low temperatures and often observed during wire drawing. This stage of deformation, in the following referred to as stage IV, is determined by the microstructural evolution of dislocation cells. At elevated temperatures, rapid stress saturation is typically reached and no stage IV behavior is observed. This behavior is modelled in the present work, following the concept of state-parameter based plasticity, evolving dislocation density and subgrain formation as functions of strain rate, strain and temperature. It

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11

Hoyos, Laureano, Roya Davoodi-Bilesavar, Ujwalkumar Patil, Jairo Yepes-Heredia, Diego Pérez-Ruiz, and José Cruz. "Behavior of unsaturated cohesive-frictional soils over a whole range of suction/thermo-controlled stress paths and modes of deformation." Soils and Rocks 44, no. 3 (2021): 1–12. http://dx.doi.org/10.28927/sr.2021.066621.

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The present work documents some of the most recent experimental evidence of the thermohydro-mechanical behavior of compacted soils over a whole range of suction- and/or thermo-controlled stress paths and modes of deformation, including data from a series of triaxial, true triaxial, plane strain, ring shear, and resonant column tests conducted on different types of cohesive-frictional soils in the low-to-medium matric suction range under either room temperature or thermally controlled conditions. The work has been accomplished at the Advanced Geomechanics Laboratory of the University of Texas a

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12

Krállics, György, András Reé, Kristóf Bobor, and Viktor Szombathelyi. "Limitations in Measuring the Flow Stress." Materials Science Forum 752 (March 2013): 85–94. http://dx.doi.org/10.4028/www.scientific.net/msf.752.85.

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In designing of plastic metalworking technologies, one determining amount used is the flow stress (kf ) of the material to be formed. A few experimental methods are used to measure it, but in all case it is intended to establish a specific stress and strain state in the whole volume of the specimen, or at least in its majority. In our work the limitations of upsetting in axial symmetrical and plane strain states were investigated by FE modeling and experimental methods within cold working conditions. Both methods were executed on traditional testing machines and Gleeble 3800 thermo-mechanical

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13

Ilyasov, U. R. "Peculiarities of heating of thermo-poroelastic media." Proceedings of the Mavlyutov Institute of Mechanics 11, no. 2 (2016): 226–32. http://dx.doi.org/10.21662/uim2016.2.033.

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The problem of heating of liquid saturated thermo-poroelastic media, without taking into account the phase transitions are solved. Self-similar solutions describing the pressure field, temperature and stress of the porous skeleton are obtained. The dependence of the thermal impact on the parameters of the external action and properties of the medium is studied. It is shown that near of the heating boundary of a porous media, skeleton are tested both compressive and tensile stress. It was found that the main factor affecting the value of the stress-strain state is the thermal expansion of porou

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14

Chernobryvko, Marina, Leopold Kruszka, and Yuorii Vorobiev. "Thermo-Elastic-Plastic Constitutive Model for Numerical Analysis of Metallic Structures under Local Impulsive Loadings." Applied Mechanics and Materials 566 (June 2014): 493–98. http://dx.doi.org/10.4028/www.scientific.net/amm.566.493.

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The tasks of dynamic behavior of constructions’ elements under the impulsive loadings modeling are examined. Mathematical models are taken into account to calculate thermo-elastic-plastic deformations, dynamic properties of materials, large deformations and strains. Numerical calculations of the dynamic stress-strain state for steel constructions are conducted for a local impulsive loading.

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15

Martinez Page, Maria Angeles, and Stefan Hartmann. "Modeling and Simulation of the Aging Behavior of a Zinc Die Casting Alloy." Applied Mechanics 5, no. 4 (2024): 646–95. http://dx.doi.org/10.3390/applmech5040037.

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While zinc die-casting alloy Zamak is widely used in vehicles and machines, its solidified state has yet to be thoroughly investigated experimentally or mathematically modeled. The material behavior is characterized by temperature and rate sensitivity, aging, and long-term influences under external loads. Thus, we model the thermo-mechanical behavior of Zamak in the solid state for a temperature range from −40∘C to 85∘C, and the aging state up to one year. The finite strain thermo-viscoplasticity model is derived from an extensive experimental campaign. This campaign involved tension, compress

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16

Rao, K. P., and E. B. Hawbolt. "Development of Constitutive Relationships Using Compression Testing of a Medium Carbon Steel." Journal of Engineering Materials and Technology 114, no. 1 (1992): 116–23. http://dx.doi.org/10.1115/1.2904131.

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Empirical or semi-empirical stress-strain relationships are of limited applicability because (i) they require a large number of constants to represent the effect of process variables, (ii) they are not able to adequately describe the typical hot deformation characteristics i.e., strain hardening at lower strains and steady state flow stress at higher strains, and (iii) they are not able to provide reliable extrapolation. In the present study, flow curves for hot deformation of a medium carbon steel in compression were obtained using a computer controlled thermo-mechanical simulator. The flow s

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17

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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18

Wang, Lei, and Feng Liu. "Dynamic Recrystallization Behavior of N08028 Corrosion Resistant Alloy." Materials Science Forum 788 (April 2014): 396–405. http://dx.doi.org/10.4028/www.scientific.net/msf.788.396.

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The dynamic recrystallization (DRX) of N08028 corrosion resistant alloy was investigated by hot compression tests which were performed at the deformation temperatures from 1000°C to 1200°C and strain rate from 0.01s-1 to 1s-1 on a Gleeble-1500 thermo-mechanical simulator. The stress-strain curves at all strain rates showed the characteristics of DRX and exhibited a peak in the flow stress before reaching steady state. The microstructures after deformation demonstrated that DRX took place in all specimens. The results show that DRX occurs more easily with the decrease of strain rate and the inc

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19

Lin, Z. C., and S. Y. Lin. "A Coupled Finite Element Model of Thermo-Elastic-Plastic Large Deformation for Orthogonal Cutting." Journal of Engineering Materials and Technology 114, no. 2 (1992): 218–26. http://dx.doi.org/10.1115/1.2904165.

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In this paper, a coupled model of the thermo-elastic-plastic material under large deformation for orthogonal cutting is constructed. A chip separation criterion based on the critical value of the strain energy density is introduced into the analytical model. A scheme of twin node processing and a concept of loading/unloading are also presented for chip formation. The flow stress is taken as a function of strain, strain rate and temperature in order to reflect realistic behavior in metal cutting. The cutting tool is incrementally advanced forward from an incipient stage of tool-workpiece engage

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20

Aniskin, Nikolai Alekseevich, and Alexey Mikhailovich Shaytanov. "Optimization of the Temperature and Thermo-Stressed State of a Concrete Dam Constructed from Particularly Lean Roller-Compacted Concrete." Buildings 13, no. 4 (2023): 914. http://dx.doi.org/10.3390/buildings13040914.

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In this paper, we consider the optimization of temperature conditions and the thermo-stressed state of a concrete gravity dam made of extra lean roller-compacted concrete constructed in climate conditions corresponding to the Pskem HPP in the Republic of Uzbekistan. We show the need to take into account the effect of solar radiation on the heating of the concrete mass during the layer-by-layer construction of a gravity dam. A methodology was used to estimate solar radiation, considering cloud cover and the use of field and satellite observations. The seasonality of the concrete work and the te

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21

Chovnyuk, Yuriy, Petro Cherednichenko, Volodymyr Kravchyuk, Olga Ostapushchenko, and Eugenie Ivanov. "MODELING AND ANALYSIS OF THE DEFORMED MEDIA (METAL CONSTRUCTION ELEMENTS) NON STATIONARY THERMAL FIELDS DURING THEIR LASER SHORT WAVES PULSES TREATMENT." Current problems of architecture and urban planning, no. 60 (April 26, 2021): 277–96. http://dx.doi.org/10.32347/2077-3455.2021.60.277-296.

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Substantiated mathematical model for non-stationary thermoelastic deformed media during their laser processing by short waves pulses fields analysis is proposed . Precise analytical solutions of the thermal conductivity equations which simulate the short laser pulses interaction and allow to further determine their components thermally stress-strain state of the processed materials, in particular, thin porous films, capillary-porous bodies are obtained. Two analysis methods were used: 1) traditional separating variables method (Fourier method), 2) non-Fourier analysis of the non-stationary the

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22

Kuhara, Kei, and Manabu Enoki. "Stress Analysis of the Swelling and Deswelling Process of Thermo-Responsive Gel." Key Engineering Materials 353-358 (September 2007): 2215–18. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.2215.

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Poly-N-isopropylacrylamide (PNIPA) gel is a typical thermo responsive gel which undergoes a large volume change from the low-temperature swollen phase to the high-temperature shrunken phase. In this study, the mechanical behavior of PNIPA gels was investigated by the experiment and simulation. The cylindrical shaped specimens of PNIPA gel were prepared and tensioned at various temperature. Swelling ratio at equilibrium state was calculated by diameter of swelling gels. Young modulus was obtained from stress-strain curve plotted using tensile load measured by semiconductor gauge. Also swelling

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23

Szparaga, Łukasz, Piotr Myśliński, Adam Gilewicz, and Jerzy Ratajski. "Investigations on the Thermo-Mechanical Properties of CrN/CrCN Gradient Coatings Using a Thermo-Dilatometric Method." Solid State Phenomena 223 (November 2014): 100–109. http://dx.doi.org/10.4028/www.scientific.net/ssp.223.100.

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The paper describes issues related to the use of dilatometric methods for the study of thermo-mechanical properties of PVD gradient coatings. Tests were conducted on three types of CrCN / CrN coatings, which differed in the nature of the change of physico-chemical parameters in the gradient transition layer, deposited on a molybdenum substrate with the use of the cathodic arc evaporation method. The scope of the experimental studies included an analysis of the changes of the thermal “extortion” of the substrate – PVD coating system during annealing processes. In parallel, for comparison purpos

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Costa, D. C. T., M. C. Cardoso, Gláucio S. da Fonseca, Luciano Pessanha Moreira, M. Martiny, and S. Mercier. "Strain-Induced Martensite Formation of AISI 304L Steel Sheet: Experiments and Modeling." Materials Science Forum 869 (August 2016): 490–96. http://dx.doi.org/10.4028/www.scientific.net/msf.869.490.

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Metastable austenitic stainless steels are prone to strain-induced martensite transformation (SIMT) during deformation at room temperature, as in the case of sheet metal forming processes. The SIMT is influenced by the chemical composition, grain size, temperature, deformation mode or stress state and strain-rate. In this work, interrupted and continuous uniaxial tensile tests were performed in AISI 304L sheet to evaluate the SIMT as a function of strain and strain-rate effects. The SIMT was evaluated by feritscope and temperature in-situ measurements and both XRD and optical microscopy techni

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25

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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Viernstein, Bernhard, Tomasz Wojcik, and Ernst Kozeschnik. "State Parameter-Based Yield Strength Model for Integration in Finite Element User-Material Routines." Metals 12, no. 7 (2022): 1207. http://dx.doi.org/10.3390/met12071207.

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A new state parameter-based user-subroutine for finite-element software packages, which can be used to simulate microstructure-dependent stress–strain relations, is presented. Well-established precipitation kinetics, strain hardening and strengthening models are brought into a condensed form to optimise computational efficiency, without losing their predictive capabilities. The framework includes main strengthening mechanisms, such as, precipitation strengthening, solid solution strengthening, the cross-core diffusion effect and work hardening. With the novel user-subroutine, the microstructur

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27

Kiyko, I. A. "Thermo-mechanical processes." Izvestiya MGTU MAMI 7, no. 3-1 (2013): 15–23. http://dx.doi.org/10.17816/2074-0530-67960.

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The theory of thermo-mechanical processes, as an apparatus in the development of equations of state and thermodynamics of continuous media, includes all the main sections of the fundamental mechanics of deformable solids. The paper considers two aspects of the overall problem: 1) non-monotonic processes in visco-plastic flows; 2) panel flutter of viscoelastic plates. In the first case there is released a fundamentally new problem - the definition of the functional of contact friction and the construction of the theory of plasticity under complex loading of bodies with non-uniform initial stres

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Sun, Yu Jie, Yu Lu, Jian Xu, and Chun Ming Shi. "Prediction of Welding Residual Stress by Using Thermo-Metallurgical-Mechanical Constitute Model." Advanced Materials Research 834-836 (October 2013): 791–94. http://dx.doi.org/10.4028/www.scientific.net/amr.834-836.791.

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The objective of this paper is to investigate the effects of solid-state phase transformation on welding residual stress in high stress low alloy steel. In this study, based on commercial finite element software, a sequentially coupled thermal, metallurgical, mechanical plane strain finite element model is developed. The main effort is to develop a series of subroutines which consider the heat transfer from welding arc and numerical implementation of a thermo-metallurgical-mechanical constitute equation. The effectiveness of developed computational method is confirmed by a butt welding simulat

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Velay, Vincent, Denis Delagnes, and Gérard Bernhart. "Advances in Cyclic Behavior and Lifetime Modeling of Tempered Martensitic Steels Based on Microstructural Considerations." Key Engineering Materials 378-379 (March 2008): 81–100. http://dx.doi.org/10.4028/www.scientific.net/kem.378-379.81.

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Cyclic behavior and life prediction of two tempered martensitic steels (AISI H11 and L6) are investigated under thermo-mechanical loading conditions. Two non isothermal constitutive models developed in the same framework of the thermodynamics of irreversible processes are introduced. The first one, in relation with the tempering state, considers the fatigue-ageing phenomena whereas the second one is intended to take into account more complex loading paths. This last non unified approach allows to define different strain mechanisms which can be related to microstructural considerations. The str

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Прозоровский, A. Prozorovskiy, Корецкий, et al. "Reliability Computation of Heat-power Engine Structures Based on Finite Element Modeling." Safety in Technosphere 3, no. 3 (2014): 28–36. http://dx.doi.org/10.12737/4939.

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The computational method was suggested for reliability of heat-power engine structures under continuous random in-process loads. The method is based on numerical statistical modeling of an in-process stress-strain state (SSS) of a structure with random characteristics of structural materials and computation of damage accumulation and durability of the structure under random stationary loadings. The chemical criterion of durable strength has been applied to calculate damage accumulation. The iteration method for a three-dimensional thermo-mechanics problem and the finite-element method have bee

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Shorinov, O. "Finite element analysis of thermal stress in Cu2O coating synthesized on Cu substrate." Archives of Materials Science and Engineering 115, no. 2 (2022): 58–65. http://dx.doi.org/10.5604/01.3001.0016.0753.

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The paper aims to find the magnitude and nature of thermal residual stresses that occur during cooling of a copper sample with a thermally synthesized oxide layer of Cu2O. Thermo-mechanical analysis was performed by the finite element method using Ansys Software. The results of thermal analysis were used to study the resulting stress-strain state of the thin film/coating system after cooling. Based on the modeling results, the paper determined the most stress-strain areas of the sample with a coating, which are the free edges of the interfaces between the copper substrate and the Cu2O oxide la

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Al-Ramahi, Nawres J., Roberts Joffe, and Janis Varna. "Numerical stress analysis in adhesively bonded joints under thermo-mechanical loading." Advances in Mechanical Engineering 12, no. 10 (2020): 168781402095507. http://dx.doi.org/10.1177/1687814020955072.

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The objective of this work is to evaluate the effect of residual thermal stresses, arising after assembling a single-lap joint at elevated temperature, on the inelastic thermo-mechanical stress state in the adhesive layer. The numerical analysis (FEM) employing linear and non-linear material models, with geometrical nonlinearity accounted for, is carried out. Simulating the mechanical response, the calculated thermal stresses are assigned as initial conditions to polymeric, composite and metallic joint members to reflect the loading sequence where the mechanical strain is applied to cooled-dow

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Nobre, João Paulo, Maria José Marques, and António Castanhola Batista. "Stress Determination by IHD in Additively Manufactured Austenitic Steel Samples: A Validation Study." Metals 15, no. 5 (2025): 485. https://doi.org/10.3390/met15050485.

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The present work aims to verify whether the incremental hole-drilling technique (IHD), a widely accepted technique, is suitable for determining residual stresses in AISI 316L samples obtained by selective laser melting (SLM). The thermo-mechanical effects of cutting during the application of this technique can induce unwanted residual stresses due to the relatively low thermal conductivity of this material, leading to erroneous results. To accomplish this aim, a hybrid experimental-numerical method was implemented to analyze the ability of IHD to determine an imposed stress state. Experimental

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Wang, Zhen, Qixin Ma, Zhouzhu Mao, et al. "Hot Deformation Behavior of Fe40Mn20Cr20Ni20 Medium-Entropy Alloy." Metals 14, no. 1 (2023): 32. http://dx.doi.org/10.3390/met14010032.

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Fe40Mn20Cr20Ni20 medium-entropy alloy (MEA) has a single-phase crystal structure with high strength and good ductility at room temperature. It is important to study the hot deformation behavior for this alloy at a partially recrystallized state for possible high-temperature applications. In this investigation, the tensile tests were conducted on sheet materials treated via cold rolling combined with annealing at strain rates of 1 × 10−3–1 × 10−1 s−1 and deformation temperatures of 573–873 K. And the hyperbolic sine model was used to study the relationship between the peak stress, deformation e

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Cesselin, Bénédicte, Djae Ali, Jean-Jacques Gratadoux, et al. "Inactivation of the Lactococcus lactis high-affinity phosphate transporter confers oxygen and thiol resistance and alters metal homeostasis." Microbiology 155, no. 7 (2009): 2274–81. http://dx.doi.org/10.1099/mic.0.027797-0.

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Numerous strategies allowing bacteria to detect and respond to oxidative conditions depend on the cell redox state. Here we examined the ability of Lactococcus lactis to survive aerobically in the presence of the reducing agent dithiothreitol (DTT), which would be expected to modify the cell redox state and disable the oxidative stress response. DTT inhibited L. lactis growth at 37 °C in aerobic conditions, but not in anaerobiosis. Mutants selected as DTT resistant all mapped to the pstFEDCBA locus, encoding a high-affinity phosphate transporter. Transcription of pstFEDCBA and a downstream put

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Shanta, Shah Nusrat Jahan, and Abdus Sattar Mollah. "Structural and Thermal Analysis of Fuel Rod of VVER-1200 Nuclear Reactor Using ANSYS Software." MIST INTERNATIONAL JOURNAL OF SCIENCE AND TECHNOLOGY 13 (June 30, 2025): 65–71. https://doi.org/10.47981/j.mijst.13(01)2025.510(65-71).

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This study focuses on analyzing the thermo-mechanical behavior of fuel rods in VVER-1200 nuclear reactors to ensure their safe and efficient operation. Bangladesh plans to operate two VVER-1200 reactors at Rooppur by 2025/2026, aligning with global efforts to shift toward low-carbon energy sources. The analysis, performed using ANSYS software, evaluates key parameters such as deformation, stress, strain, temperature distribution, and heat flux. A detailed geometric model of the UO₂ fuel rod with zirconium alloy cladding and helium gas in the gap has been developed. Thermal distribution simulat

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Burns, S. J., J. Ryan Rygg, Danae Polsin, et al. "Planar, longitudinal, compressive waves in solids: Thermodynamics and uniaxial strain restrictions." Journal of Applied Physics 131, no. 21 (2022): 215904. http://dx.doi.org/10.1063/5.0097342.

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A new tri-axial pressure-based constitutive expression has been found using Cauchy's stress tensor. This stress state emphasizes pressure and shear stress. The description is a pressure plus an effective shear stress allowing for a constitutive law based on atomic solid-state phase changes in crystalline cells due to pressure plus shear-based dislocation motion commonly associated with plasticity. Pressure has a new role in the material's constitutive response as it is separated from plasticity. The thermo-mechanical system describes third-order Gibbs’ expressions without specific volume restr

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Burns, S. J., J. Ryan Rygg, Danae Polsin, et al. "Planar, longitudinal, compressive waves in solids: Thermodynamics and uniaxial strain restrictions." Journal of Applied Physics 131, no. 21 (2022): 215904. http://dx.doi.org/10.1063/5.0097342.

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A new tri-axial pressure-based constitutive expression has been found using Cauchy's stress tensor. This stress state emphasizes pressure and shear stress. The description is a pressure plus an effective shear stress allowing for a constitutive law based on atomic solid-state phase changes in crystalline cells due to pressure plus shear-based dislocation motion commonly associated with plasticity. Pressure has a new role in the material's constitutive response as it is separated from plasticity. The thermo-mechanical system describes third-order Gibbs’ expressions without specific volume restr

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PERUMAN, K. VALLAL, S. VINODH KUMAR, K. PUSHPANATHAN, and M. MAHENDRAN. "STRUCTURAL AND MARTENSITIC TRANSFORMATION OF BULK, DISORDERED AND NANOCRYSTALLINE Ni2MnGa ALLOYS." Functional Materials Letters 04, no. 04 (2011): 415–18. http://dx.doi.org/10.1142/s1793604711002329.

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Ferromagnetic Ni2MnGa nanoparticles were prepared by post milling and annealing method. Differential scanning calorimetry studies confirm absence of martensitic and Curie transformation in the disordered state. It was found that the bulk alloy was annealed into a well-defined 7 M structure at around 1073 K. The residual stress of nanoparticles induced the disordered phase to transform into a NM tetragonal phase through atomic ordering. Thermo hysteresis curve of the 'disordered' powder was linear and revealed very low moment indicative of paramagnetic nature. It is confirmed that the martensit

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Liu, Geng, Tian Xiang Liu, and Qin Xie. "Thermal Effects on Elasto-Plastic Contacts between Rough Surfaces." Materials Science Forum 532-533 (December 2006): 801–4. http://dx.doi.org/10.4028/www.scientific.net/msf.532-533.801.

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The effects of the steady-state frictional heating on the contact performance of surface asperities and subsurface stress fields between rough surfaces are investigated in this paper. The asperity distortion caused by the temperature variation in a tribological process, micro plastic flow of surface asperities, and the coupled thermo-elasto-plastic behavior of the materials, with and without considering the strain-hardening property of the materials are studied. In addition, the contact pressure, real area of contact, and average gap of real rough surface with different frictional heat inputs

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Baran, Ismet, Johnny Jakobsen, Jens H. Andreasen, and Remko Akkerman. "Investigation of the Residual Stress State in an Epoxy Based Specimen." Key Engineering Materials 651-653 (July 2015): 375–80. http://dx.doi.org/10.4028/www.scientific.net/kem.651-653.375.

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Process induced residual stresses may play an important role under service loading conditions for fiber reinforced composite. They may initiate premature cracks and alter the internal stress level. Therefore, the developed numerical models have to be validated with the experimental observations. In the present work, the formation of the residual stresses/strains are captured from experimental measurements and numerical models. An epoxy/steel based sample configuration is considered which creates an in-plane biaxial stress state during curing of the resin. A hole drilling process with a diamete

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Viazovychenko, Yuliia, and Oleksiy Larin. "Computational approach to thermal-stressed state modeling of tire based on the algorithm of its self-heating analysis . Part 1 – Theoretical basics of the approach." Bulletin of the National Technical University «KhPI» Series: Dynamics and Strength of Machines, no. 2 (December 31, 2022): 61–67. http://dx.doi.org/10.20998/2078-9130.2022.2.270935.

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Elastomers and their composites are widely used in modern innovative technology: for the production of aviation and automobile tires, anti-vibration elements (rubber, rubber-metal springs), dampers, elastomeric bearings. Also they are used in shaft suspensions, as spacers between structural parts, supporting parts and fasteners. Elastomeric elements of structures have a high dynamic load, in particular of a cyclic nature, which is accompanied by the formation of hysteresis loops and, as a result, the occurrence of the phenomenon of self-heating. An increase in temperature in the middle of mate

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Vyzovichenko, Iuliia, та Oleksiy Larin. "Сomputational approach to thermal-stressed state modeling of tire based on the algorithm of its self-heating analysis. Part 2 – Practical results of applying the approach". Bulletin of the National Technical University «KhPI» Series: Dynamics and Strength of Machines, № 2 (21 грудня 2023): 77–87. http://dx.doi.org/10.20998/2078-9130.2023.2.293683.

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Elastomers and their composites are widely used in modern innovative technology: for the production of aviation and automobile tires, anti-vibration elements (rubber, rubber-metal springs), dampers, elastomeric bearings. Also they are used in shaft suspensions, as spacers between structural parts, supporting parts and fasteners. Elastomeric elements of structures have a high dynamic load, in particular of a cyclic nature, which is accompanied by the formation of hysteresis loops and, as a result, the occurrence of the phenomenon of self-heating. An increase in temperature in the middle of mate

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L, Shevchuk. "THERMOPLASTIC DEFORMATIONS OF ASPHALT CONCRETE LAYER ON A METAL BRIDGE PLATE WHEN ASPHALT CONCRETE THICKNESS IS CHANGED." National Transport University Bulletin 1, no. 51 (2022): 423–29. http://dx.doi.org/10.33744/2308-6645-2022-1-51-423-429.

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Based on 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, is considered under conditions of changing ambient temperature at different values of the asphalt concrete thickness. It is believed that the materials of the layers are characterized by different thermomechanical parameters, which determine the inhomogeneity of the stress and strain fields. It has been established by computer modeling that these factors lead to the concentration of stresses and strai

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Ganczarski, Artur, and Marcin Cegielski. "Thermal Effect Accompanying Low Cycle Fatigue of Al-2024." Solid State Phenomena 240 (August 2015): 108–13. http://dx.doi.org/10.4028/www.scientific.net/ssp.240.108.

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When a material is subjected to a cyclic loading at high values of stress or strain, both thermal and damage develop together with cyclic plastic strain. These processes are often accompanied by damage deactivation characterized by actual state of micro-cracks, which are generally active under tension and passive under compression. In classical formulation damage deactivation occurs instantly when loading changes sign and consequently leads to non-smooth path separating both load ranges. The real materials, however, do not exhibit such bilinear paths. Therefore, the more realistic model based

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Arefi, Mohammad, Iman Nahas, and Majid Abedi. "Thermo-Elastic Analysis Of A Rotating Hollow Cylinder Made Of Arbitrary Functionally Graded Materials." Journal of Theoretical and Applied Mechanics 45, no. 4 (2015): 41–60. http://dx.doi.org/10.1515/jtam-2015-0023.

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AbstractThermo-mechanical analysis of the functionally graded orthotropic rotating hollow structures, subjected to thermo-mechanical loadings is studied in this paper. The relations were derived for both plane strain and plane stress conditions as a cylinder and disk, respectively. Non homogeneity was considered arbitrary through thickness direction for all mechanical and thermal properties. The responses of the system including temperature distribution, radial displacement and radial and circumferential stresses were derived in the general state. As case study, power law gradation was assumed

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Kovalchuk, Vitalii, Yuriy Hnativ, Joseph Luchko, and Mykola Sysyn. "Study of the temperature field and the thermo-elastic state of the multilayer soil-steel structure." Roads and Bridges - Drogi i Mosty 19, no. 1 (2020): 65–78. http://dx.doi.org/10.7409/rabdim.020.004.

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The technology of renewal of metal corrugated structures allows efficient and economical reconstruction of existing reinforced concrete structures by the method of encapsulation. However, such structures can be exposed to adverse temperature effects that in combination with traffic loadings could influence the operational reliability of the structures. This article deals with the method of evaluation of the stress-strain state of a three-layer cylindrical structure. The technique is based on the thermo-elasticity theory. The study is performed in two steps: determining the temperature field of

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Zhuk, Yaroslav, Mykola Melnichenko, Arash Soleiman Fallah, and Vitalii Husak. "Numerical Model for Simulation of the Laser Thermal Forming Process." Axioms 14, no. 4 (2025): 255. https://doi.org/10.3390/axioms14040255.

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A numerical model to simulate the laser thermoforming process (LTF) is proposed. It is developed on the basis of the thermodynamically consistent theory of coupled thermo-viscoplasticity and is suitable for modeling the LTF for thin-walled metal structural elements. In the frame of this model, the problem statement consists of the Cauchy relation, equations of motion, and the energy balance equation, which is reduced to the heat conduction equation, along with mechanical and thermal boundary conditions, as well as initial conditions. To describe the behavior of the material, a generalized mode

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J. J. Lutchko and V. V. Kovalchuk. "DETERMINATION OF TEMPERATURE STRESSES AND STRAINS IN METAL SPANS BRIDGES." Bridges and tunnels: Theory, Research, Practice, no. 4 (June 2, 2015): 26–36. http://dx.doi.org/10.15802/bttrp2013/26629.

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Purpose. For metal bridges topical study of the stress-strain state arising from the effects of variable temperature extremes of the environment, since the last five years rihayutsya observed significant increases ambient temperatures in summer and decrease in winter. Methodology. Using data from experimental measurements of temperaturedistribution on the surface of the beam-honovyh buildings of metal bridges using an analytical model was calculated thermal stresses and deformations tion arising from a given temperature distribution. Findings. Based on the calculated data revealed that statist

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Kostina, Anastasiia, Maxim Zhelnin, Oleg Plekhov, and Kirill Agutin. "THM-coupled numerical analysis of temperature and groundwater level in-situ measurements in artificial ground freezing." Frattura ed Integrità Strutturale 16, no. 61 (2022): 1–19. http://dx.doi.org/10.3221/igf-esis.61.01.

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Belarusian Potash salt deposits are bedded under aquifers and unstable soil stratums. Therefore, to develop the deposits a vertical mine shaft sinking is performed using the artificial ground freezing technology. Nowadays, real time observations of ground temperature and groundwater level is applied to control the ground freezing process. Numerical simulation can be used for a comprehensive analysis of measurements results. In this paper a thermo-hydro-mechanical model of freezing of water saturated soil is proposed. The governing equations of the model are based on balance laws for mass, ener

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