Computational Continuum Mechanics最新文献_第3页

Shape distortions, plastic strains and residual stresses after one-sided forging/rolling of the beam: application to additive manufacturing of the linear metal segment with layer-by-layer pressure treatment 梁单侧锻造/轧制后的形状变形、塑性应变和残余应力:应用于逐层压力处理的线性金属段的增材制造

Computational Continuum Mechanics Pub Date : 1900-01-01 DOI: 10.7242/1999-6691/2021.14.4.36

I. Keller, A. Kazantsev, D. Dudin, G. Permyakov, M. Kartashev

引用次数: 1

Three-level model based on physical theories of plasticity: Formulation, implementation algorithms, results of application to the study of cyclic loading 基于塑性物理理论的三级模型:公式、实现算法、在循环荷载研究中的应用结果

Computational Continuum Mechanics Pub Date : 1900-01-01 DOI: 10.7242/1999-6691/2022.15.3.21

P. Trusov, D. Gribov

引用次数: 0

Peculiarities of hydrodynamics of pumps for the extraction of high-viscosity oil 高粘度油抽提泵流体力学特性研究

Computational Continuum Mechanics Pub Date : 1900-01-01 DOI: 10.7242/1999-6691/2019.12.2.15

D. A. Pavlov, S. Peshcherenko

引用次数: 0

Modeling of elastoplastic deformation of steel 45 along Archimedes spiral type trajectories 45钢沿阿基米德螺旋型轨迹的弹塑性变形建模

Computational Continuum Mechanics Pub Date : 1900-01-01 DOI: 10.7242/1999-6691/2021.14.1.9

A. Alekseev

{"title":"Modeling of elastoplastic deformation of steel 45 along Archimedes spiral type trajectories","authors":"A. Alekseev","doi":"10.7242/1999-6691/2021.14.1.9","DOIUrl":"https://doi.org/10.7242/1999-6691/2021.14.1.9","url":null,"abstract":"This paper addresses the mathematical modeling of complex elastoplastic deformation of steel 45 along the plane trajectory in the Ilyushin’s deviatoric space, which consists of sections of both constant and variable curvature (Archimedes spiral). The constitutive equations of the proposed mathematical model are based on the Ilyushin’s vector representation of strain and stress. An approximate model of the theory of elastoplastic processes is used in mathematical modeling for plane trajectories with approximations of process functionals, which depend on the initial value of the curvature, rather than on the current curvature of the deformation trajectory. The constitutive equations of the mathematical model are reduced to the Cauchy problem, a numerical solution to which is obtained using the fourth order Runge–Kutta method. The validity of the mathematical model for this class of curvilinear strain trajectories was verified by comparing the calculation results with the experimental data obtained on the automated test machine SN-EVM in the mechanical testing laboratory of the Tver State Technical University. The experiment was carried out on thin-walled cylindrical specimens of steel 45 under complex loading (combined tension- compression and torsion). The calculation results and experimental data characterizing the scalar and vector properties of the material are presented graphically. It has been established that the proposed approximate mathematical model is able to capture (both qualitatively and quantitatively) the main effects of complex plastic deformation for the considered class of strain trajectories in the areas of small and medium curvature. More accurate calculation results in the approximations of the plasticity functionals can be obtained by taking into account all complex loading parameters, including the current curvature of the strain trajectory, especially for strain trajectories with large curvature.","PeriodicalId":273064,"journal":{"name":"Computational Continuum Mechanics","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127525583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Data processing of field measurements of expedition research for mathematical modeling of hydrodynamic processes in the Azov Sea 亚速海水动力过程数学建模考察研究现场测量数据处理

Computational Continuum Mechanics Pub Date : 1900-01-01 DOI: 10.7242/1999-6691/2020.13.2.13

A. Sukhinov, A. Atayan, Y. Belova, V. Litvinov, A. Nikitina, A. Chistyakov

{"title":"Data processing of field measurements of expedition research for mathematical modeling of hydrodynamic processes in the Azov Sea","authors":"A. Sukhinov, A. Atayan, Y. Belova, V. Litvinov, A. Nikitina, A. Chistyakov","doi":"10.7242/1999-6691/2020.13.2.13","DOIUrl":"https://doi.org/10.7242/1999-6691/2020.13.2.13","url":null,"abstract":"This paper describes a three-dimensional mathematical hydrodynamic model capable of taking into account the processes of salt and heat transfer in the Azov Sea. The model allows obtaining three-dimensional fields of the vector of water flow rates, pressure, sea water density, salinity and temperature. The model is based on the equations of motion (Navier–Stokes), the continuity equation in the case of variable density, and the equations of heat and salt transport. The boundary and initial conditions are indicated. To approximate the equation of diffusion–convection–reaction in time, we analyzed the schemes with weights. The approximation of the problem of calculating the velocity field of the aquatic environment in terms of spatial variables was carried out on the basis of the balance method taking into account the occupancy ratios of the control areas. The stationary modes of the heat and salt transfer problem were investigated. The initial distribution of the salinity and temperature functions, which have a sufficient degree of smoothness at the points of setting the field values, was calculated using the Laplace equation. Using the interpolation algorithm and by superimposing the boundaries of the region, maps of salinity and temperature of the Sea of Azov were obtained. Based on the monitoring of the water area, three-dimensional mathematical models of the movement of the aquatic environment designed to predict possible scenarios for the development of the Azov Sea ecosystem were constructed in order to avoid the occurrence of anaerobic infection areas and take timely measures for their localization. The full-scale data obtained using different types of measuring instruments was used to develop observation models for prediction of the changes in hydrodynamic processes. A modified Kalman filter algorithm was applied to obtain unbiased minimum-variance state estimation for the dynamic system. A description is given of a software package that allows modeling hydrodynamic processes in shallow water bodies with complex spatial structures of currents, taking into account the transport of salts and heat.","PeriodicalId":273064,"journal":{"name":"Computational Continuum Mechanics","volume":"197 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116444239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Numerical analysis of multiple scattering of an acoustic wave on a set of sound-permeable spheres in 3D space 三维空间中声波在一组透声球上多次散射的数值分析

Computational Continuum Mechanics Pub Date : 1900-01-01 DOI: 10.7242/1999-6691/2022.15.4.29

E. Nasibullaeva

引用次数: 0

Influence of non-stationary river discharge on the quality of water withdrawal in the presence of density stratification 密度分层存在时，不稳定河流流量对取水水质的影响

Computational Continuum Mechanics Pub Date : 1900-01-01 DOI: 10.7242/1999-6691/2022.15.2.10

T. Lyubimova, A. Lepikhin, Y. Parshakova, A. V. Bogomolov, Y. Lyakhin

引用次数: 2

Direct numerical simulation of double-diffusive convection at vibrations 振动时双扩散对流的直接数值模拟

Computational Continuum Mechanics Pub Date : 1900-01-01 DOI: 10.7242/1999-6691/2023.16.3.24

N. V. Kozlov

引用次数: 0

Synchronous oscillations of two plates in a viscous incompressible fluid 粘性不可压缩流体中两个板的同步振荡

Computational Continuum Mechanics Pub Date : 1900-01-01 DOI: 10.7242/1999-6691/2022.15.4.33

A. Kamalutdinov, A. Nuriev, O.S. Zhuchkova, O. Zaitseva

引用次数: 1

Numerical investigation of the evolution of microstructure of nickel-based alloys during plastic working 塑性加工过程中镍基合金显微组织演变的数值研究

Computational Continuum Mechanics Pub Date : 1900-01-01 DOI: 10.7242/1999-6691/2019.12.3.23

A. A. Rogovoy, N. Salikhova

引用次数: 0