Acta Mechanica最新文献_第8页

Analysis of traveling wave vibration of GNPs-reinforced bi-directional functionally graded rotating joined cylindrical–conical–cylindrical shells gnps增强双向功能梯度旋转圆柱-圆锥-圆柱连接壳行波振动分析

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-04-25 DOI: 10.1007/s00707-025-04309-6

Runhao Wan, Wenguang Liu, Long Chen, Lei Pang

{"title":"Analysis of traveling wave vibration of GNPs-reinforced bi-directional functionally graded rotating joined cylindrical–conical–cylindrical shells","authors":"Runhao Wan, Wenguang Liu, Long Chen, Lei Pang","doi":"10.1007/s00707-025-04309-6","DOIUrl":"10.1007/s00707-025-04309-6","url":null,"abstract":"<div><p>This article systematically examines the traveling wave vibration characteristics of graphene nanoplatelets (GNPs) reinforced bi-directional functionally graded rotating joined cylindrical–conical–cylindrical (JCCC) shells. Initially, combined with the Donnell thin shell theory and the Halpin–Tsai model, the energy equation of the functionally graded materials (FGMs) JCCC shells is derived. Subsequently, Chebyshev polynomials are utilized to express the displacement function, and the modal frequency equation of the shells is established using the Rayleigh–Ritz method. Finally, the accuracy of the theoretical model is validated through the utilization of case studies, and parameter studies are conducted in the end. The results indicate that the gradient exponent in the thickness direction predominantly influences the vibration characteristics. The FG-X distribution of GNPs has the most significant effect on the JCCC shells. The rigidity of the JCCC shells decreases with an increase in the semi cone angle. As porosity increases, the total mass fraction and surface area of GNPs exhibit a more effective reinforcing effect. As the temperature increases, the stiffness of the structure decreases. The intrinsic frequencies of the structure increase almost linearly with increase in thickness.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 5","pages":"3035 - 3053"},"PeriodicalIF":2.3,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143930171","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

New nonlocal poro-thermoelasticity model and impact response of laser heated temperature-dependent metallic sandwich-like porous laminated composites 激光加热温度相关金属三明治状多孔层合复合材料的非局部孔隙热弹性模型及冲击响应

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-04-24 DOI: 10.1007/s00707-025-04333-6

Chenlin Li, Jiaheng Liu, Yuhao Wang

引用次数: 0

Implementation of isotropic hyperelastic material models: automatic code generation in MATLAB 各向同性超弹性材料模型的实现：在MATLAB中自动生成代码

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-04-24 DOI: 10.1007/s00707-025-04277-x

S. Eisenträger, L. Maurer, D. Juhre, H. Altenbach, J. Eisenträger

{"title":"Implementation of isotropic hyperelastic material models: automatic code generation in MATLAB","authors":"S. Eisenträger, L. Maurer, D. Juhre, H. Altenbach, J. Eisenträger","doi":"10.1007/s00707-025-04277-x","DOIUrl":"10.1007/s00707-025-04277-x","url":null,"abstract":"<div><p>With the advent of artificial intelligence and scientific machine learning, the discovery of new material models is driven at an unprecedented pace. However, integrating these novel constitutive laws into finite element analysis codes typically requires expert knowledge in different fields, including mathematics, computer science, continuum mechanics, and numerical methods. This presents a severe roadblock to the widespread adoption of these models in both research and industry. To address this challenge, a methodology for the automatic generation of user material subroutines is presented. This automated code generation process exploits <span>MATLAB</span>’s Symbolic (Math) Toolbox to derive closed-form expressions of the second Piola–Kirchhoff stress tensor and the fourth-order elasticity tensor directly from the strain energy density functional. The resulting expressions are automatically incorporated into a user material template previously developed by the authors. This subroutine is compatible with in-house finite element codes and, with minimal modifications, can be adapted to generate <span>FORTRAN</span> subroutines for use in <span>ABAQUS</span>. The source code is available for download from , allowing readers to immediately test and apply our methodology.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 6","pages":"3413 - 3444"},"PeriodicalIF":2.9,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00707-025-04277-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168059","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

Solvable structures in the falling cat problem 落猫问题中的可解结构

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-04-23 DOI: 10.1007/s00707-025-04336-3

Adrián Ruiz, Cláudio H. C. Costa Basquerotto

引用次数: 0

A partially debonded circular elastic inhomogeneity with a liquid slit inclusion occupying the debonded section under uniform heat flux and temperature change 在均匀热流和温度变化下，部分脱粘的圆形弹性不均匀性，其中液体狭缝包裹体占据了脱粘部分

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-04-22 DOI: 10.1007/s00707-025-04330-9

Xu Wang, Peter Schiavone

{"title":"A partially debonded circular elastic inhomogeneity with a liquid slit inclusion occupying the debonded section under uniform heat flux and temperature change","authors":"Xu Wang, Peter Schiavone","doi":"10.1007/s00707-025-04330-9","DOIUrl":"10.1007/s00707-025-04330-9","url":null,"abstract":"<div><p>We study the two-dimensional heat conduction and thermoelastic problems associated with a circular isotropic elastic inhomogeneity partially debonded from an infinite isotropic elastic matrix subjected to uniform remote in-plane heat flux and uniform temperature change. The debonded portion of the circular interface is occupied by a thermally insulated and incompressible liquid slit inclusion. Closed-form solutions to the two problems are derived by solving two Riemann-Hilbert problems with discontinuous coefficients. The two unknown constants appearing in the solution of the thermoelastic problem are determined by imposing the incompressibility condition of the liquid inclusion. Elementary expressions for the internal uniform hydrostatic stress field within the liquid slit inclusion, the average mean stress within the circular elastic inhomogeneity, the rigid body rotation at the center of the circular inhomogeneity and the two complex stress intensity factors at the two tips of the debonded portion are obtained. A uniform temperature change will not induce any singular stress field and the entire circular interface remains perfect.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 6","pages":"3397 - 3411"},"PeriodicalIF":2.9,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167244","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

Interpretable data-driven turbulence modeling for separated flows using symbolic regression with unit constraints 使用带有单元约束的符号回归的分离流的可解释数据驱动湍流建模

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-04-21 DOI: 10.1007/s00707-025-04325-6

Boqian Zhang, Juanmian Lei

{"title":"Interpretable data-driven turbulence modeling for separated flows using symbolic regression with unit constraints","authors":"Boqian Zhang, Juanmian Lei","doi":"10.1007/s00707-025-04325-6","DOIUrl":"10.1007/s00707-025-04325-6","url":null,"abstract":"<div><p>Machine learning techniques have been applied to enhance turbulence modeling in recent years. However, the “black box” nature of most machine learning techniques poses significant interpretability challenges in improving turbulence models. This paper introduces a novel unit-constrained turbulence modeling framework using symbolic regression to overcome these challenges. The framework amends the constitutive equation of linear eddy viscosity models (LEVMs) by establishing explicit equations between the Reynolds stress deviation and mean flow quantities, thereby improving the LEVM model’s predictive capability for large separated turbulence. Unit consistency constraints are applied to the symbolic expressions to ensure physical realizability. The effectiveness of the framework and the generalization capability of the learned model are demonstrated through its application to the separated flow over 2D periodic hills and a backward-facing step. Compared to the standard <i>k-ε</i> model, the learned model shows significantly improved predictive accuracy for anisotropic Reynolds stresses, velocity and skin friction, while exhibiting promising generalization capabilities across various scenarios.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 5","pages":"3295 - 3320"},"PeriodicalIF":2.3,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929991","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

Vibration behavior of a thick double-curved sandwich panel with auxetic core and carbon nanotube reinforced composite based on TSDDCT and NSGT 基于TSDDCT和NSGT的碳纳米管增强复合材料-含氧芯厚双曲夹层板振动特性研究

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-04-20 DOI: 10.1007/s00707-025-04302-z

Mohammad Ali Mohammadimehr, Abbas Loghman, Saeed Amir, Mehdi Mohammadimehr, Ehsan Arshid

{"title":"Vibration behavior of a thick double-curved sandwich panel with auxetic core and carbon nanotube reinforced composite based on TSDDCT and NSGT","authors":"Mohammad Ali Mohammadimehr, Abbas Loghman, Saeed Amir, Mehdi Mohammadimehr, Ehsan Arshid","doi":"10.1007/s00707-025-04302-z","DOIUrl":"10.1007/s00707-025-04302-z","url":null,"abstract":"<div><p>One of the advantages of sandwich structures is the high strength ratio to weight; thus, they are used in various industries such as automobile manufacturing, shipping, airplanes, spacecraft, rockets, railways, and bridges. The present study investigates the vibration behavior of a thick double-curved sandwich panel with an auxetic core and carbon nanotube reinforced composite in face sheet layers based on nonlocal strain gradient theory. In this research, the nano-structural dependence of nonlocal vibration behavior for the double-curved sandwich panel is to investigate the existence of a limit for the scale parameter. The displacement field of the double-curved sandwich panel is considered based on the third-order shear deformation double-curved theory. The displacement fields for four cases such as first and third shear deformation theories for double-curved or flat plate states are formulated. Thus, the governing equations of motion using Hamilton's principle are obtained. Various effects including the nonlocal parameter, strain gradient parameter, aspect ratio, thickness ratio, the radius of curvature, different angles of the auxetic core, four-type geometric of structure, four-type displacement field, and different distributions of CNTs on the dimensionless natural frequencies of the thick double-curved sandwich panel are illustrated. The dimensionless natural frequency increases much more for the positive angle compared to the negative angle. It is shown that the effects of external physical parameters and internal characteristic parameters on vibration behaviors of a double-curved sandwich panel are independent. In this article, the thick double-curved sandwich panel includes four cases, such as cylindrical, spherical, elliptical, and flat plate shapes, so it is used in turbine blades and airplane wings.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 5","pages":"2967 - 3000"},"PeriodicalIF":2.3,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929979","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

Crack-inclusion problem in a superconducting cylinder under pulsed field magnetization 脉冲磁场下超导圆柱体的裂纹夹杂问题

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-04-20 DOI: 10.1007/s00707-025-04337-2

Yufeng Zhao, Jing Yu

引用次数: 0

Vibration analysis of a smart multi-layer composite cylindrical panel reinforced with graphene nanoplatelets based on higher-order shear and normal deformation theory 基于高阶剪切法向变形理论的石墨烯纳米片增强多层复合材料智能圆柱板振动分析

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-04-19 DOI: 10.1007/s00707-025-04329-2

Shayan Mannani, Mohammad Arefi, Shadman Mannani

引用次数: 0

Dynamic analysis of rigid cantilever wall retaining linear elastic granular soil with microstructure under time harmonic seismic motion 时谐地震作用下微结构刚体悬挑墙线弹性颗粒土动力分析

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-04-19 DOI: 10.1007/s00707-025-04327-4

Qingyuan Gong, Edmond V. Muho, Niki D. Beskou, Ying Zhou

{"title":"Dynamic analysis of rigid cantilever wall retaining linear elastic granular soil with microstructure under time harmonic seismic motion","authors":"Qingyuan Gong, Edmond V. Muho, Niki D. Beskou, Ying Zhou","doi":"10.1007/s00707-025-04327-4","DOIUrl":"10.1007/s00707-025-04327-4","url":null,"abstract":"<div><p>The plane strain problem of the seismic behavior of a rigid cantilever wall retaining a linear elastic granular soil layer over bedrock is solved analytically. The horizontal seismic motion is assumed to be time harmonic, and thus, the problem is solved in the frequency domain. The granular soil is simulated by a linear elastic solid with microstructure due to Mindlin characterized by both micro-stiffness and micro-inertia. The problem is solved first for the case of two rigid walls, and the solution for one rigid wall considered here is obtained as the special case with the wall separation distance to be large enough. The equations of motion for the soil are two partial differential equations with two unknowns (the horizontal and vertical displacements) but of the 4th order instead of the 2nd one, which is the case of classical elasticity. Thus, the boundary conditions here are 8 instead of 4 in classical elasticity. The two displacements are expanded in Fourier sine and cosine series along the horizontal direction, and thus, the two partial differential equations of the problem become ordinary differential equations, which can be easily solved analytically. Finally, the resultant seismic pressure on the wall, the seismic base shear and moment as well as the location of the point of application of that resultant force on the wall are all determined in closed form. The solution is verified against the classical elastic solution by using it as a special case with microstructural effects going to zero. Parametric studies are also performed in order to assess the effects of microstructure on the seismic response of the system.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 6","pages":"3337 - 3357"},"PeriodicalIF":2.9,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167245","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