Acta Mechanica最新文献_第9页

Wave propagation characteristics and energy harvesting of magnetically tunable defective phononic crystal microbeams 磁可调谐缺陷声子晶体微束的波传播特性及能量收集

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-01-21 DOI: 10.1007/s00707-024-04194-5

X. Y. Gao, J. W. Qin, J. Hong, S. P. Wang, G. Y. Zhang

{"title":"Wave propagation characteristics and energy harvesting of magnetically tunable defective phononic crystal microbeams","authors":"X. Y. Gao, J. W. Qin, J. Hong, S. P. Wang, G. Y. Zhang","doi":"10.1007/s00707-024-04194-5","DOIUrl":"10.1007/s00707-024-04194-5","url":null,"abstract":"<div><p>This paper investigates the wave propagation characteristics and energy harvesting potential of magnetically tunable defective phononic crystal (PnC) microbeams incorporating microstructure effects. A theoretical model of a sandwich-structured phononic crystal beam is developed, utilizing modified couple stress theory. Parametric studies are conducted to examine the influence of microstructure, external magnetic fields, and defect lengths on bandgap and defect band formation. Numerical simulations reveal how defect mode shapes impact elastic wave localization, providing insights for efficient energy harvesting. Furthermore, the transmission curves under different magnetic field intensities and defect segment lengths were analyzed using the spectral element method, along with the output voltage generated by the piezoelectric layer attached to the defect region. The results demonstrate that external magnetic fields offer non-contact tunability of bandgap and defect bands frequencies. This study lays the foundation for optimizing energy harvesting devices based on phononic crystal defect structures.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 3","pages":"1579 - 1597"},"PeriodicalIF":2.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143638648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Size-dependent vibration and static analyses of a nanobeam made of time-dependent material attached with viscoelastic boundaries using three different beam theories 使用三种不同的梁理论对附着黏弹性边界的时变材料制成的纳米梁进行尺寸相关振动和静态分析

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-01-20 DOI: 10.1007/s00707-025-04228-6

Hayrullah Gün Kadıoğlu, Ömer Civalek, Büşra Uzun, Mustafa Özgür Yaylı

{"title":"Size-dependent vibration and static analyses of a nanobeam made of time-dependent material attached with viscoelastic boundaries using three different beam theories","authors":"Hayrullah Gün Kadıoğlu, Ömer Civalek, Büşra Uzun, Mustafa Özgür Yaylı","doi":"10.1007/s00707-025-04228-6","DOIUrl":"10.1007/s00707-025-04228-6","url":null,"abstract":"<div><p>In this study, free vibration analysis of viscoelastic nanobeams under viscoelastic boundary conditions has been carried out separately for Euler–Bernoulli, Timoshenko, and Levinson beam theories. First, the non-local theory and the viscoelastic model have been established, and then, the equations of motion have been obtained using Hamilton's principles. Higher-order Fourier series obtained by Stokes’ transforms have been used to solve the problem. With the inclusion of boundary conditions in the problem, an eigenvalue problem has been constructed from which the frequencies for each beam theory can be obtained. The results have been presented in graphs and tables, and some important results have been obtained; for example, the effect of damping decreases as the non-local length scale parameter increases, damping has more effect in large modes, and the influence of viscous damping parameter of Euler–Bernoulli beam theory is more than other beam theories.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 3","pages":"1551 - 1578"},"PeriodicalIF":2.3,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00707-025-04228-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143638563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transient thermoelastic responses of dielectrics subjected to ultrashort shaped pulses 电介质在超短形脉冲作用下的瞬态热弹性响应

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-01-20 DOI: 10.1007/s00707-025-04227-7

Muqiu Peng, Sen Leng, Yi Zhao, Xiaogeng Tian

{"title":"Transient thermoelastic responses of dielectrics subjected to ultrashort shaped pulses","authors":"Muqiu Peng, Sen Leng, Yi Zhao, Xiaogeng Tian","doi":"10.1007/s00707-025-04227-7","DOIUrl":"10.1007/s00707-025-04227-7","url":null,"abstract":"<div><p>Ultrashort laser pulse shaping is one of the crucial technologies to improve the ultrashort pulsed laser machining of dielectrics. However, the thermoelastic responses have not been considered in the previous studies in this area. This study aims to accurately predict the thermoelastic responses of dielectrics subjected to ultrashort shaped laser pulses and to provide guidance for the laser processing of dielectrics. In this paper, the Guyer–Krumhansl heat conduction and nonlocal elasticity are integrated into the theory of ultrafast laser-material interactions to accurately predict the thermoelastic responses during ultrashort shaped pulses. The evolution of electron density, electron temperature, lattice temperature, and thermal stresses are obtained using finite element method. The transient responses during two-pulse laser irradiation and the influences of pulse shaping parameters (including pulse number, separation time, and energy ratio of sub-pulses) are analyzed. Results indicate that the temperature rise during the first laser pulse is much lower than that during the subsequent pulses. The maximum value of circumferential stress at different laser parameters almost keeps unchanged due to the reduced elastic modulus. The laser parameters have significant effects on the temperature and stresses.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 3","pages":"1535 - 1550"},"PeriodicalIF":2.3,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143638562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Extending a higher-order foldability constitutive model for dynamic response analysis of 3D-reinforced shell of deformable 扩展用于可变形三维加固壳体动态响应分析的高阶可折叠性构成模型

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-01-20 DOI: 10.1007/s00707-024-04216-2

Xizhu Li, Ling Luo, Mostafa Habibi, Luyao Wang

{"title":"Extending a higher-order foldability constitutive model for dynamic response analysis of 3D-reinforced shell of deformable","authors":"Xizhu Li, Ling Luo, Mostafa Habibi, Luyao Wang","doi":"10.1007/s00707-024-04216-2","DOIUrl":"10.1007/s00707-024-04216-2","url":null,"abstract":"<div><p>This analytical paper investigates application of a novel higher-order shear deformable mathematical model for investigating vibrational analysis of a doubly curved shell in which the kinematic relations are extended using the variable-thickness transverse deflection. The Hamiltonian method is extended to derive the governing motions equations in the curvilinear coordinate system. The constitutive relations are extended using the experimental and statistical relations in the literature for a copper matrix including various amount of three-dimensional graphene nanofillers named as graphene origami using hydrogenation process. The analytical results are presented using the mathematical model in order to trace the impact of graphene origami characteristics and geometric parameters of the double-curved shell. The temperature-dependency relations for material properties as well as folding and content are employed for investigating the impact of affecting parameters. The results are presented with and without thickness stretching effect to arrive at a more confidence results.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 3","pages":"1509 - 1533"},"PeriodicalIF":2.3,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143638561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Magnetic-thermoelastic coupling resonance and bifurcation behavior of a rotating functionally graded cylindrical shell induced by armature 电枢诱导功能梯度旋转圆柱壳的磁热耦合共振及分岔行为

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-01-19 DOI: 10.1007/s00707-025-04224-w

Jianbo Feng, Yuda Hu

{"title":"Magnetic-thermoelastic coupling resonance and bifurcation behavior of a rotating functionally graded cylindrical shell induced by armature","authors":"Jianbo Feng, Yuda Hu","doi":"10.1007/s00707-025-04224-w","DOIUrl":"10.1007/s00707-025-04224-w","url":null,"abstract":"<div><p>The magnetic-thermoelastic coupling resonance, bifurcation, and chaos of a rotating functionally graded cylindrical shell induced by armature are investigated in present work. The air-gap magnetic field is excited by armature, which induces the nonlinear magnetization of ferromagnetic materials. Meanwhile, a thermal field is set to be distributed nonlinearly along thickness. Based on the dual-nonlinear magneto-thermal effects, geometric nonlinear factors are introduced through Kirchhoff–Love theory. Combining thermoelasticity and magnetic-solid coupling theories, the magnetic-thermoelastic coupling dynamical model is established by Hamilton’s principle. The Galerkin truncation is used to obtain discrete equations, and the amplitude–frequency relationship and stability criterion are derived from Krylov–Bogoliubov–Mitropolski method and Lyapunov stability theory. Through numerical examples, the effects of electromagnetic parameters, temperature, rotational speed, excitation, and dimensions on coupling resonance behaviors are discussed. Results indicate that the resonance region is expanded by increasing the magnetic potential, and non-solution regions are discovered when the excitation position approaches constraints. The bifurcation and chaos exhibit high sensitivity to magnetic potential, rotational speed, and excitation. The response state can be transmitted from periodic to chaos through period-doubling and tangent bifurcation routes.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 2","pages":"1429 - 1457"},"PeriodicalIF":2.3,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Review on interpretations, applications, and developments of numerical methods in studying interface fracture 数值方法在界面断裂研究中的解释、应用及发展综述

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-01-18 DOI: 10.1007/s00707-024-04212-6

Junling Hou, Xiang Guo, Qun Li, Dandan Zhu, George J. Weng

{"title":"Review on interpretations, applications, and developments of numerical methods in studying interface fracture","authors":"Junling Hou, Xiang Guo, Qun Li, Dandan Zhu, George J. Weng","doi":"10.1007/s00707-024-04212-6","DOIUrl":"10.1007/s00707-024-04212-6","url":null,"abstract":"<div><p>The development of advanced materials like multi-phase composites has brought attention to the problem of interface fracture, leading to a focus on the study of interface fracture mechanics. Numerical methods have become predominant tools for studying interface fracture problems due to their ability to effectively model complex interface fracture processes. This article provides a comprehensive review of the historical development, current research trends, and prospects of numerical methods in interface fracture mechanics. Specifically, the most commonly-used numerical methods in interface fracture mechanics are discussed, including the finite element method, boundary element method, extended finite element method, cohesive zone model, and phase-field method. Additionally, the utilization of the generalized finite element method, scaled boundary finite element method, and molecular dynamic approaches for addressing interface fracture problems in specific cases are also highlighted. This review aims to serve as a valuable resource and reference for researchers and engineers in this field.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 2","pages":"591 - 629"},"PeriodicalIF":2.3,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Effects of strain rate on the superelasticity of polycrystalline NiTi shape memory alloy with microvoids: constitutive modeling and molecular dynamics 应变速率对带微孔洞的多晶NiTi形状记忆合金超弹性的影响：本构建模和分子动力学

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-01-15 DOI: 10.1007/s00707-025-04223-x

Xiang Zhu, Shihao Li, Shan Zhou, Hua Yuan, Guansuo Dui

{"title":"Effects of strain rate on the superelasticity of polycrystalline NiTi shape memory alloy with microvoids: constitutive modeling and molecular dynamics","authors":"Xiang Zhu, Shihao Li, Shan Zhou, Hua Yuan, Guansuo Dui","doi":"10.1007/s00707-025-04223-x","DOIUrl":"10.1007/s00707-025-04223-x","url":null,"abstract":"<div><p>Effects of strain rate and grain size on the superelastic behaviors of polycrystalline NiTi shape memory alloy with microvoids are investigated based on theoretical analysis and molecular dynamics simulation. Firstly, a new constitutive model which is able to reproduce the strain rate and grain size dependence of stress–strain responses is proposed. The proposed model incorporates a transformation function similar to the Gurson–Tvergaard–Needleman potential and takes the presence of microvoids and void growth into account. Secondly, the mechanisms of martensitic transformation, the microstructure evolution during deformation and the superelastic responses at different strain rates and porosity levels are revealed at the atomic level. The simulated results by molecular dynamics demonstrate that the superelasticity of polycrystalline NiTi exhibits a strong dependence on the grain size, the volume fraction of microvoids and the strain rate. The transformation flow stress and dissipation energy density are found to be sensitive to the strain rate and the porosity level; the gradually decreasing grain size exerts an inhibitory influence on the stress-induced martensitic forward and reverse transformation. Higher strain rate and lower porosity have the ability to increase the critical transformation stress and the overall stress level. At last, adopting the parameters obtained from atomic simulation, the proposed model's capability in capturing the strain rate and grain size-dependent superelastic properties of polycrystalline NiTi-containing microvoids is validated.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 2","pages":"1381 - 1394"},"PeriodicalIF":2.3,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Free vibration analysis of sandwich cylindrical shells with functionally graded carbon nanotube-reinforced composite face sheets using the differential quadrature (DQ) method 用微分正交法分析功能梯度碳纳米管增强复合材料面板夹层圆柱壳的自由振动

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-01-15 DOI: 10.1007/s00707-025-04230-y

Hadj Youzera, Sid Ahmed Meftah, Abdelouahed Tounsi, Mohamed Abdelaziz Salem, Khaled Mohamed Khedher, Murat Yaylacı

{"title":"Free vibration analysis of sandwich cylindrical shells with functionally graded carbon nanotube-reinforced composite face sheets using the differential quadrature (DQ) method","authors":"Hadj Youzera, Sid Ahmed Meftah, Abdelouahed Tounsi, Mohamed Abdelaziz Salem, Khaled Mohamed Khedher, Murat Yaylacı","doi":"10.1007/s00707-025-04230-y","DOIUrl":"10.1007/s00707-025-04230-y","url":null,"abstract":"<div><p>This study investigates the free vibration behavior of cylindrical shell with a stiff core and functionally graded carbon nanotube-reinforced composite (FG-CNTRC) face sheets. Both uniformly distributed CNT reinforced (UD-CNT) and functionally graded CNT reinforced (FG-CNT) in the thickness direction are used to examine their impact on the vibration characteristics of sandwich cylindrical shells. The governing differential equations of motions are derived using Hamilton’s principle. These equations are solved using the differential quadrature (DQ) method to calculate the natural frequencies of the sandwich cylindrical shell. This approach allows for the consideration of various support configurations of the sandwich cylindrical beams. A comprehensive parametric study is performed to explore the influence of carbon nanotube volume fraction, core-to-face sheet thickness ratio, slenderness ratio, and end supports on the free vibration behavior of cylindrical shells with functionally graded carbon nanotube-reinforced composite (FG-CNTRC) face sheets. The results show that the effects of carbon nanotubes and other geometric factors significantly influence the dimensionless frequencies of the sandwich cylindrical shells.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 2","pages":"1395 - 1410"},"PeriodicalIF":2.3,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

The effects of turbulence modeling on dynamic stall 湍流建模对动态失速的影响

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-01-15 DOI: 10.1007/s00707-025-04232-w

Giacomo Baldan, Francesco Manara, Gregorio Frassoldati, Alberto Guardone

引用次数: 0

Study of the behavior of photothermal and mechanical stresses in semiconductor nanostructures using a photoelastic heat transfer model that incorporates non-singular fractional derivative operators 利用包含非奇异分数阶导数算子的光弹性传热模型研究半导体纳米结构中光热和机械应力的行为

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-01-15 DOI: 10.1007/s00707-024-04195-4

Ibrahim-Elkhalil Ahmed, Ahmed E. Abouelregal, Mohammed Aldandani

{"title":"Study of the behavior of photothermal and mechanical stresses in semiconductor nanostructures using a photoelastic heat transfer model that incorporates non-singular fractional derivative operators","authors":"Ibrahim-Elkhalil Ahmed, Ahmed E. Abouelregal, Mohammed Aldandani","doi":"10.1007/s00707-024-04195-4","DOIUrl":"10.1007/s00707-024-04195-4","url":null,"abstract":"<div><p>This study presents a novel nonlocal mathematical model for thermo-photo-elasticity, addressing the limitations of classical theories in understanding the interactions between thermal, mechanical, and photoelastic deformations in semiconductors, such as silicon and germanium. The model incorporates nonlocal elasticity, modified heat conduction, and non-singular fractional derivatives, which capture memory effects and nonlocal thermal conduction, offering a more accurate representation of heat propagation. By extending classical elasticity to include long-range spatial and temporal interactions, the model is particularly suited for materials where microscale effects impact macroscopic mechanical behavior. Additionally, it introduces the modified Moore–Gibson–Thompson (MGT) heat conduction model, accounting for finite-speed heat propagation and time delays, thus replacing the classical Fourier approach with a more comprehensive framework that integrates plasma waves and thermomechanical effects.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 2","pages":"1339 - 1358"},"PeriodicalIF":2.3,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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