Continuum Mechanics and Thermodynamics最新文献_第3页

Analysis of thermoelastic wave behavior in double porous structures induced by laser pulse heating 激光脉冲加热诱导双孔结构热弹性波行为分析

IF 2.2 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2026-02-18 DOI: 10.1007/s00161-026-01450-y

Imed Kedim, Taoufik Moulahi, Abdelaala Ahmed, E. S. Elidy

{"title":"Analysis of thermoelastic wave behavior in double porous structures induced by laser pulse heating","authors":"Imed Kedim, Taoufik Moulahi, Abdelaala Ahmed, E. S. Elidy","doi":"10.1007/s00161-026-01450-y","DOIUrl":"10.1007/s00161-026-01450-y","url":null,"abstract":"<div><p>This paper investigates the propagation of two-dimensional thermoelastic waves in a semiconductor medium characterized by double porosity and subjected to pulsed laser excitation. The analysis is conducted within the frameworks of the Lord–Shulman (LS) and Green–Lindsay (GL) theories, which incorporate finite thermal wave speeds and relaxation effects. The governing equations describing the temperature, carrier density, and stress fields are analytically solved using the harmonic wave method. The study emphasizes the effects of time variation, thermoelastic coupling, and laser pulse intensity on the evolution of the dynamic fields. Three-dimensional graphical representations demonstrate the combined influence of these parameters on both thermal and mechanical responses. The findings show that an increase in the thermoelastic coupling parameter intensifies the interaction between thermal and elastic fields, while temporal variations and laser energy significantly modify wave amplitude and energy distribution. A comparative assessment of the CD, LS, and GL theories further clarifies the impact of relaxation times on thermoelastic wave propagation in double-porosity semiconductor materials.</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"38 2","pages":""},"PeriodicalIF":2.2,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146230711","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

Advanced thermoelastic analysis of bidirectionally graded materials under Moore Gibson Thompson thermoelastic model Moore - Gibson - Thompson热弹性模型下双向梯度材料的高级热弹性分析

IF 2.2 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2026-02-18 DOI: 10.1007/s00161-025-01446-0

Ajay Kumar, Praveen Ailawalia, Jatinder Kaur, Ahmed E. Abouelregal

{"title":"Advanced thermoelastic analysis of bidirectionally graded materials under Moore Gibson Thompson thermoelastic model","authors":"Ajay Kumar, Praveen Ailawalia, Jatinder Kaur, Ahmed E. Abouelregal","doi":"10.1007/s00161-025-01446-0","DOIUrl":"10.1007/s00161-025-01446-0","url":null,"abstract":"<div><p>This study introduces a novel investigation into a thermoelastic response of functionally graded materials (FGMs) by incorporating bidirectional non-homogeneity within the Moore–Gibson–Thompson thermoelasticity framework. The primary innovation lies in analyzing material properties with exponential variation in two directions, advancing beyond the conventional unidirectional gradation prevalent in existing literature. This work contributes a robust formulation and analytical solution of governing equations for this complex bidirectional case, employing the normal mode technique to derive explicit expressions for displacement components, temperature distribution, and stress fields. Numerical simulations, conducted using MATLAB, illustrate the model’s application at a specific time point, offering actionable insights. Results reveal that bidirectional gradation significantly enhances the material stiffness, reducing normal displacement compared to homogeneous or unidirectionally graded materials. Notably, the model achieves a nearly uniform tangential stress distribution, minimizing stress concentrations and bolstering resistance to shear failure. However, it induces a substantial, nonlinear increase in normal stress, which can be leveraged for targeted load-bearing applications. The thermal response is highly tailorable; bidirectional gradation enables a balanced temperature distribution, mitigating both the exponential rise from horizontal gradation and the gradual decrease from vertical gradation. These findings position the proposed model as a powerful engineering tool. By optimizing gradation parameters, engineers can design FGMs with customized thermomechanical properties, ideal for high-performance applications in aerospace, thermal barrier systems, and structural components under extreme conditions.</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"38 2","pages":""},"PeriodicalIF":2.2,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146230861","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

Buckling and near-critical post-buckling of sandwich cylindrical shells with FG-GNP face sheets and an auxetic core under external pressure in a thermal environment: a closed-form approach 热环境下外压下FG-GNP面板和增心夹层圆柱壳的屈曲和近临界后屈曲：封闭形式方法

IF 2.2 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2026-02-17 DOI: 10.1007/s00161-026-01453-9

Ahmet Çalık

{"title":"Buckling and near-critical post-buckling of sandwich cylindrical shells with FG-GNP face sheets and an auxetic core under external pressure in a thermal environment: a closed-form approach","authors":"Ahmet Çalık","doi":"10.1007/s00161-026-01453-9","DOIUrl":"10.1007/s00161-026-01453-9","url":null,"abstract":"<div><p>This paper presents a closed-form formulation for the linear buckling and near-critical single-mode post-buckling response of sandwich cylindrical shells with functionally graded graphene nanoplatelet (FG-GNP) reinforced face sheets and an auxetic honeycomb core under external pressure and a thermal environment. The shell kinematics follow First-order Shear Deformation Theory (FSDT). Face-sheet properties are obtained from a temperature-dependent Halpin–Tsai scheme combined with a power-law through-thickness gradation, while the auxetic core is represented by equivalent orthotropic constants. A Winkler–Pasternak foundation is included. A single-harmonic Galerkin reduction yields a <span>(5times 5)</span> generalized eigenproblem for both simply supported (SS) and clamped–clamped (CC) boundary conditions; for CC edges, an energy-equivalent axial wavenumber is used to represent end restraint without introducing numerical mode shapes. For the baseline configuration, the minimum critical pressures are approximately 15.86 MPa at (m,n)=(1,10) for SS and 19.96 MPa at (0,11) for CC. Increasing temperature difference reduces <span>(p_{cr})</span>, whereas the foundation markedly increases it; larger FG index <i>k</i> (less GNP-rich faces) also decreases <span>(p_{cr})</span>. The Koiter single-mode expansion predicts a stable (hardening) post-buckling branch for the cases examined. The model is intended as a fast analytical screening and benchmarking tool under the stated assumptions.</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"38 2","pages":""},"PeriodicalIF":2.2,"publicationDate":"2026-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00161-026-01453-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146204857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Balance equation: local volumetric flow and surface fluxes in the theory OF continual media 平衡方程：连续介质理论中的局部体积流和表面通量

IF 2.2 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2026-02-12 DOI: 10.1007/s00161-026-01455-7

A. Zh. Khachatrian, G. P. Vardanyan, O. A. Zadoyan, Y. G. Virabyan

引用次数: 0

The modified Kachanov method. Evaporation of multiple droplets 改进的Kachanov方法。多液滴蒸发

IF 2.2 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2026-02-12 DOI: 10.1007/s00161-026-01456-6

Ivan Argatov

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An edge dislocation interacting with two circular compressible liquid inclusions 边缘位错与两个圆形可压缩液体包裹体相互作用

IF 2.2 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2026-02-11 DOI: 10.1007/s00161-025-01444-2

Xu Wang, Peter Schiavone

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Surface waves in magneto-piezoelectric thermo-microstretch material without energy dissipation 无能量耗散磁压电热微拉伸材料的表面波

IF 2.2 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2026-02-07 DOI: 10.1007/s00161-025-01448-y

Sanjay Debnath, S. Sarat Singh, Holm Altenbach

{"title":"Surface waves in magneto-piezoelectric thermo-microstretch material without energy dissipation","authors":"Sanjay Debnath, S. Sarat Singh, Holm Altenbach","doi":"10.1007/s00161-025-01448-y","DOIUrl":"10.1007/s00161-025-01448-y","url":null,"abstract":"<div><p>The present paper investigates the effects of magnetic and micropolarity on the propagation of Lamb, Rayleigh and flexural waves in generalized magneto-piezoelectric thermo-microstretch material. The thermoelastic theory without energy dissipation is used and the secular equations of the Lamb waves for both symmetric and anti-symmetric modes of vibration in the medium of finite thickness subject to suitable boundary conditions are derived. At short wavelength limits, the secular equations reduce to that of Rayleigh waves due to the nature of a semi-infinite medium. The secular equation of the anti-symmetric vibration reduces to the secular equation of flexural waves for longer wavelengths comparable with thickness of the medium. The phase speeds and attenuation coefficients are computed numerically from these secular equations using Aluminum epoxy material and the results are presented graphically. The numerical results have shown the simultaneous existence of three modes of dispersion and attenuation for Lamb, Rayleigh and flexural waves. The effect of magnetic field intensity and micropolarity on the phase speeds and attenuation of the three modes are noted. The path of particle motion for all three modes of Lamb, Rayleigh and flexural waves are evaluated analytically and numerically at different depths of the medium. Some special cases are reduced from the current formulation to validate our results.</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"38 2","pages":""},"PeriodicalIF":2.2,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138511","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

Deformation measures of micropolar theory in spatial and material description – A review 空间和材料描述中微极理论的变形测量综述

IF 2.2 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2026-01-13 DOI: 10.1007/s00161-025-01438-0

Lucca N. Schek, Florian Massing, Elena N. Vilchevskaya, Wolfgang H. Müller, Victor A. Eremeyev

{"title":"Deformation measures of micropolar theory in spatial and material description – A review","authors":"Lucca N. Schek, Florian Massing, Elena N. Vilchevskaya, Wolfgang H. Müller, Victor A. Eremeyev","doi":"10.1007/s00161-025-01438-0","DOIUrl":"10.1007/s00161-025-01438-0","url":null,"abstract":"<div><p>In this paper we present a review of some of the foundations of micropolar continua. The focus is initially on the classical representation of fields in spatial or material description. We shall remind the reader that traditionally both are based on the notion of the indestructible material particle. We will give reasons why these traditional concepts may fail, namely if we wish to study more complex processes, such as agglomeration or crushing of matter. As a way out, we will present a suitable extension, which we call <i>true spatial description</i>. We shall also demonstrate that the classical twofold approach can lead to serious misunderstandings that may result in unnecessary scientific controversies. Further attention is paid to the various deformation measures that are encountered in the literature on micropolar materials. It will be discussed under which circumstances which one should preferably be used. In this context the kinetic equation for the microinertia tensor deserves particular attention: it was recently extended by a production term. This additional feature can be used to describe processes in matter associated with micromorphological change, for example during crushing and milling of substances. Here a continuum description in terms of material, indestructible particles is no longer possible, and true spatial notation becomes a must.</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"38 2","pages":""},"PeriodicalIF":2.2,"publicationDate":"2026-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00161-025-01438-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145961685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Nonlinear and nonlocal models of heat conduction in continuum thermodynamics 连续介质热力学中的非线性和非局部热传导模型

IF 2.2 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2026-01-13 DOI: 10.1007/s00161-025-01443-3

Claudio Giorgi, Federico Zullo

{"title":"Nonlinear and nonlocal models of heat conduction in continuum thermodynamics","authors":"Claudio Giorgi, Federico Zullo","doi":"10.1007/s00161-025-01443-3","DOIUrl":"10.1007/s00161-025-01443-3","url":null,"abstract":"<div><p>The aim of this paper is to develop a general constitutive scheme within continuum thermodynamics to describe the behavior of heat flow in deformable media. Starting from a classical thermodynamic approach, the rate-type constitutive equations are defined in the material (Lagrangian) description where the standard time derivative satisfies the principle of objectivity. All constitutive functions are required to depend on a common set of independent variables and to be consistent with thermodynamics. The statement of the Second Law is formulated in a general nonlocal form, where the entropy production rate is prescribed by a non-negative constitutive function and the extra entropy flux obeys a no-flow boundary condition. The thermodynamic response is then developed based on a variant of the Coleman-Noll procedure. In the local formulation, the free energy potential and the rate of entropy production function are assumed to depend on temperature, temperature gradient and heat-flux vector along with their time derivatives. This approach results in rate-type constitutive equations for the heat-flux vector that are intrinsically consistent with the Second Law and easily amenable to analysis. Many linear and nonlinear models of the rate type are recovered (e.g., Cattaneo-Maxwell’s, Jeffreys-like, Green-Naghdi’s, Quintanilla’s and Burgers-like). Owing to the (weakly) nonlocal formulation of the second law, weakly nonlocal models based on the heat-flux vector and its gradients are obtained within this (classical) thermodynamic framework. In particular, the nonlocal Guyer-Krumhansl model and some nonlinear generalizations devised by Cimmelli and Sellitto are obtained. Finally, we propose a new model where the heat flux dependence on temperature gradients is allowed up to second-order.</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"38 2","pages":""},"PeriodicalIF":2.2,"publicationDate":"2026-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145950767","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

Multiscale lubrication in rolling and sliding thermo-elastoplastic line contact involving the sandwich and physically adsorbed molecule films 含夹心和物理吸附分子膜的滚动和滑动热弹塑性线接触中的多尺度润滑

IF 2.2 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2026-01-08 DOI: 10.1007/s00161-025-01434-4

Yongbin Zhang

{"title":"Multiscale lubrication in rolling and sliding thermo-elastoplastic line contact involving the sandwich and physically adsorbed molecule films","authors":"Yongbin Zhang","doi":"10.1007/s00161-025-01434-4","DOIUrl":"10.1007/s00161-025-01434-4","url":null,"abstract":"<div><p>The mathematical analysis is presented for calculating the film thickness at the contact center in the hydrodynamic lubricated rolling and sliding steel line contact with the equivalent contact radius on the scale of 100mm by considering the contact thermal and macroscopic elastoplastic deformations where the film thickness is ultra low so that the adsorbed layer-continuum fluid-adsorbed layer sandwich film occurs in the inlet zone and the non-continuum physically adsorbed molecule film occurs in the flattened contact area. The calculation was made for widely varying heavy loads, slide-roll ratios and contact hardness. It was found that the lubrication in the studied contact is qualitatively different from the classical elastohydrodynamic theory description in the condition of very low film thicknesses. The effect of the adsorbed layer makes the film thickness maintained even only with several fluid molecule sizes but much higher than the classical elastohydrodynamic theory calculation. The strong contact-fluid interaction yields the significantly higher film thickness than the weak or medium contact-fluid interactions. Both the increase of the slide-roll ratio and the reduction of the contact hardness rapidly reduce the central film thickness owing to the contact thermal and plastic deformations. The variations of the lubricating film thickness at the contact center with the rolling speed and load no longer follow classical elastohydrodynamic theories because of the strong effects of the adsorbed layer and the contact thermo-elastoplastic deformations. For heavy loads, high rolling speeds and appreciable slide-roll ratios, the effect of the contact thermo-elastoplastic deformation not only largely reduces the central film thickness but also greatly increases the sensitivity of the central film thickness to the load variation.</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"38 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2026-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145930626","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