Mechanics of Solids最新文献_第10页

Study on the Dynamic Response Characteristics of Plane P-Waves in Free-Field Sites of Unsaturated Soils 非饱和土自由场址平面纵波动力响应特性研究

IF 0.9 4区工程技术

Mechanics of Solids Pub Date : 2025-07-31 DOI: 10.1134/S0025654425601272

Jianliu Yan, Qiang Ma, Meng Gao

{"title":"Study on the Dynamic Response Characteristics of Plane P-Waves in Free-Field Sites of Unsaturated Soils","authors":"Jianliu Yan, Qiang Ma, Meng Gao","doi":"10.1134/S0025654425601272","DOIUrl":"10.1134/S0025654425601272","url":null,"abstract":"Based on the wave theory of unsaturated porous medium, this paper establishes a free-field model of unsaturated soil with a thickness of H overlying a horizontal, uniform, semi-infinite bedrock layer under P-wave incidence. Drawing upon the Helmholtz principle, the wave field within an unsaturated soil site is examined, and the analytical solutions for the dispersion characteristics of bulk waves and the attenuation coefficient are derived. Through numerical simulations, the dispersion phenomenon induced by plane P-wave incidence is analyzed, and the effects of frequency, angle of incidence, saturation level, porosity, and soil layer thickness on the amplitude attenuation coefficient in an unsaturated soil free-field under P-wave excitation are discussed. The findings show that within a specific frequency range, P1-wave and S-wave in an unsaturated soil free-field exhibit no dispersion characteristics, whereas P2-wave and P3-wave demonstrate distinct dispersion behavior. The amplitude attenuation coefficient generally rises with increasing frequency and initially increases before decreasing as the incident angle grows. Simultaneously, the change of amplitude attenuation coefficient with saturation, porosity and soil thickness shows different trends in different incident angle ranges. However, at most incident angles, the amplitude attenuation coefficient is greater than 1, indicating that seismic waves usually produce vibration amplification effect, and vibration attenuation effect occurs only when the incident angle is close to vertical.","PeriodicalId":697,"journal":{"name":"Mechanics of Solids","volume":"60 3","pages":"1761 - 1775"},"PeriodicalIF":0.9,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145028433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Multiscale Mohr-Coulomb Strength Criterion of Fiber-Reinforced Cemented Soil 纤维增强水泥土的多尺度莫尔-库仑强度准则

IF 0.9 4区工程技术

Mechanics of Solids Pub Date : 2025-07-31 DOI: 10.1134/S0025654425600369

Deluan Feng, Zixin Lin, Shihua Liang, Jun Dai, Zhijuan Lei

{"title":"A Multiscale Mohr-Coulomb Strength Criterion of Fiber-Reinforced Cemented Soil","authors":"Deluan Feng, Zixin Lin, Shihua Liang, Jun Dai, Zhijuan Lei","doi":"10.1134/S0025654425600369","DOIUrl":"10.1134/S0025654425600369","url":null,"abstract":"Fiber-reinforced cemented soil (F-RCS) is an artificial multiscale geo-material, the strength of which is determined by the physical and mechanical properties of various substances of the F-RCS. To study the effect of fiber content and fiber length on the shear strength of the F-RCS, the substance phases of the F-RCS are divided into reinforcement fiber and cemented soil matrix to establish a meso cell structure of the F-RCS, which can reflect the internal substance properties of the F‑RCS. Moreover, according to microscopic kinetic characteristics of reinforcement fiber and cemented soil matrix and the mesoscopic strain gradient theory, a multiscale Mohr-Coulomb strength criterion (MCSC) of the F-RCS is deduced, and its yield locus is drawn on the π plane. Furthermore, consolidated and undrained triaxial compression tests are conducted on the F-RCS samples with various fibre content and fibre length to obtain the model parameters, and verify the proposed multiscale MCSC of the F-RCS. Results show that the multiscale MCSC the F-RCS is capabel of effectively predicting the shear strength of the F-RCS. The shape of the yield locus of the MCSC of the F-RCS is hexagonal and expands with increasing fiber content and fiber length. The shear stress of the F-RCS predicted by the multiscale MCSC of the F-RCS showcases good agreement with the test results.","PeriodicalId":697,"journal":{"name":"Mechanics of Solids","volume":"60 3","pages":"1956 - 1976"},"PeriodicalIF":0.9,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145028435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving the JAYA Algorithm for High-Cost Computing Applications 在高成本计算应用中改进JAYA算法

IF 0.9 4区工程技术

Mechanics of Solids Pub Date : 2025-07-20 DOI: 10.1134/S0025654424606827

Zhang Feng, Chu Guangyuan, Zhang Jiamu, Jin Peng

{"title":"Improving the JAYA Algorithm for High-Cost Computing Applications","authors":"Zhang Feng, Chu Guangyuan, Zhang Jiamu, Jin Peng","doi":"10.1134/S0025654424606827","DOIUrl":"10.1134/S0025654424606827","url":null,"abstract":"This article presents a novel optimization algorithm, JAYA-HCO (High-Cost Optimization), which combines the strengths of JAYA and SCA algorithms. By incorporating the update mechanism of SCA for global search and JAYA’s rapid search capability, JAYA-HCO improves the utilization of the population in JAYA algorithm and makes it more suitable for high-cost computing. Furthermore, JAYA-HCO uses sine functions to introduce mutations at appropriate times to expand the search space. Initially, a set of benchmark functions, including single and multi-modal functions, were used to compare JAYA-HCO with other algorithms in terms of mean value and computation speed. Then, a numerical example of optimizing the fiber orientation angle of laminated composite plates under unidirectional axial compression was conducted to demonstrate the effectiveness and reliability of the proposed algorithm. The objective was to maximize the critical buckling load of the laminated composite plate by adjusting the fiber orientation angle of each layer. The results show that JAYA-HCO algorithm can provide accurate and efficient optimization results, which are validated by comparison with other algorithms and finite element calculations.","PeriodicalId":697,"journal":{"name":"Mechanics of Solids","volume":"60 2","pages":"1157 - 1172"},"PeriodicalIF":0.9,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on Plastic Deformation Characteristics of Hollow Cylindrical Roller of Turntable Bearing 转台轴承空心圆柱滚子塑性变形特性研究

IF 0.9 4区工程技术

Mechanics of Solids Pub Date : 2025-07-20 DOI: 10.1134/S0025654424607109

F. Wei, H. B. Liu, Y. Y. Liu, Y. P. Sun, F. Z. Shi

引用次数: 0

Nonlinear Dynamic Analysis of Vehicle System under Road Excitation Using a Four-Degree-of-Freedom Model 基于四自由度模型的道路激励下车辆系统非线性动力学分析

IF 0.9 4区工程技术

Mechanics of Solids Pub Date : 2025-07-20 DOI: 10.1134/S0025654424604701

Xiaochuan Zhao, Quan Yuan, Qian He, Lin Lang

{"title":"Nonlinear Dynamic Analysis of Vehicle System under Road Excitation Using a Four-Degree-of-Freedom Model","authors":"Xiaochuan Zhao, Quan Yuan, Qian He, Lin Lang","doi":"10.1134/S0025654424604701","DOIUrl":"10.1134/S0025654424604701","url":null,"abstract":"This paper establishes a four-degree-of-freedom half-vehicle model with nonlinear springs and dampers to study the nonlinear vibration of a car moving on a rough road. According to D’Alembert’s principle, the nonlinear dynamical differential equations of the vehicle system under sinusoidal road excitation are obtained. A system of first-order differential equations is obtained using nondimensionalization and some techniques for order reduction of nonlinear systems with time. Then it is used to investigate the effects of damping and frequency ratios on the body displacement, pitch angle, and displacements of front and rear wheels. The numerical calculation of the equations demonstrates that the damping and frequency ratios control the nonlinear vibration behavior of the vehicle system. The proposed model can also predict the possible motion state of the vehicle system under sinusoidal road excitation at different velocities. The vehicle system will transform periodic motion into chaotic motion. The conclusions provide some available evidence for the design and improvement of the vehicle suspension system.","PeriodicalId":697,"journal":{"name":"Mechanics of Solids","volume":"60 2","pages":"1130 - 1142"},"PeriodicalIF":0.9,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Generalized Cesaro Formulas in 3D and 4D Elasticity Theories 三维和四维弹性理论中的广义Cesaro公式

IF 0.9 4区工程技术

Mechanics of Solids Pub Date : 2025-07-20 DOI: 10.1134/S0025654425600436

S. A. Lurie, P. A. Belov

引用次数: 0

Eringen’s Non-Locality and Unified Exponential Operators Induce Thermoelasticity in a Cylindrical Cavity under Thermal Loads Eringen的非定域和统一指数算子诱导热载荷作用下圆柱腔的热弹性

IF 0.9 4区工程技术

Mechanics of Solids Pub Date : 2025-07-20 DOI: 10.1134/S0025654424607250

Nikita Karde, Dilip Kamdi, Vinod Varghese, Nitin Chandel

{"title":"Eringen’s Non-Locality and Unified Exponential Operators Induce Thermoelasticity in a Cylindrical Cavity under Thermal Loads","authors":"Nikita Karde, Dilip Kamdi, Vinod Varghese, Nitin Chandel","doi":"10.1134/S0025654424607250","DOIUrl":"10.1134/S0025654424607250","url":null,"abstract":"This paper develops a mathematical model for modified heat conduction by applying exponential operators and Eringen’s non-locality stress theory within an infinite-length cylindrical cavity subjected to various time-dependent sectional heat supplies. The study employs both the Caputo-Fabrizio and Rabotnov fractional differential operators, which, despite both utilizing exponential functions, differ significantly in their definitions. The Caputo-Fabrizio operator is widely used in fractional calculus due to its nonsingular kernel and broad applicability. In contrast, the Rabotnov operator is particularly effective for modeling complex physical processes and real-life phenomena. The study material is homogeneous and isotropic with uniform surface pressure across boundaries; the model derives exact solutions to the modified heat conduction equations using the integral transformation technique. Solutions in the Laplace transform domain are inverted back to the time domain via the Gaver-Stehfest algorithm. This research highlights the importance of temperature distribution in predicting the behavior of non-local thermoelastic displacement and stress functions with fractional exponential operators. The model, grounded in Eringen’s non-local continuum theory, provides numerical solutions illustrated graphically. The special case analyzed involves various sectional heat supplies affecting the inner curved surface, emphasizing the non-Fourier thermal behavior and the influence of non-local parameters on transient thermoelastic responses. These findings are crucial for accurate predictions in the design and processing of micro- and nanostructures.","PeriodicalId":697,"journal":{"name":"Mechanics of Solids","volume":"60 2","pages":"1404 - 1426"},"PeriodicalIF":0.9,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On Various Functions Called Entropy when Using Classical Mechanics 论经典力学中称为熵的各种函数

IF 0.9 4区工程技术

Mechanics of Solids Pub Date : 2025-07-20 DOI: 10.1134/S0025654424605688

A. M. Shmatkov

引用次数: 0

Analysis of Mechanical Properties of Flexoelectric Nano-plates Based on Nonlocal Strain Gradient Theory 基于非局部应变梯度理论的柔性电纳米板力学性能分析

IF 0.9 4区工程技术

Mechanics of Solids Pub Date : 2025-07-20 DOI: 10.1134/S0025654425600151

Y. S. Li, A. Q. Li, S. S. Zhou, R. M. Zhang, G. F. Wei, F. Ren, J. W. Qiao, S. J. Zhou

{"title":"Analysis of Mechanical Properties of Flexoelectric Nano-plates Based on Nonlocal Strain Gradient Theory","authors":"Y. S. Li, A. Q. Li, S. S. Zhou, R. M. Zhang, G. F. Wei, F. Ren, J. W. Qiao, S. J. Zhou","doi":"10.1134/S0025654425600151","DOIUrl":"10.1134/S0025654425600151","url":null,"abstract":"At present, nano-plates with flexoelectric effect have become a research hotspot because they are not affected by material symmetry, so the range of material choices is significantly expanded compared with traditional piezoelectric materials. In this study, considering the flexoelectric effect and utilizing the nonlocal strain gradient theory (NSGT), a novel model is introduced for analyzing transversely isotropic rectangular nano-plates under a distributed load. This new model takes into account nonlocal effect, size effect, and flexoelectricity. By applying the Hamilton principle, the governing equations are derived for two different circuits. In order to verify the validity of the new model, we compare it with the results of the finite element method (FEM) and give its first eight mode shapes. At the same time, the theoretical model is numerically solved, and based on the numerical results, the mechanical properties of the flexoelectric nano-plate are analyzed and discussed. The theoretical and simulation results of this paper provide a reliable theoretical support for the design of devices based on flexoelectric nano-plates.","PeriodicalId":697,"journal":{"name":"Mechanics of Solids","volume":"60 2","pages":"1272 - 1288"},"PeriodicalIF":0.9,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A New Method for Determining the Buckling Resistance in the Nonlinear Range of Strains for a Column Supported by Rotational Stiffeners 一种确定旋转加劲柱在非线性应变范围内屈曲抗力的新方法

IF 0.9 4区工程技术

Mechanics of Solids Pub Date : 2025-07-20 DOI: 10.1134/S0025654424603902

V. V. Chistyakov, S. M. Soloviev

引用次数: 0