Continuum Mechanics and Thermodynamics最新文献_第8页

Heat conduction in multi-component step-wise FGMs 多组分阶梯式 FGM 中的热传导

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-03-22 DOI: 10.1007/s00161-024-01296-2

Olga Szlachetka, Ivan Giorgio

{"title":"Heat conduction in multi-component step-wise FGMs","authors":"Olga Szlachetka, Ivan Giorgio","doi":"10.1007/s00161-024-01296-2","DOIUrl":"10.1007/s00161-024-01296-2","url":null,"abstract":"<div><p>This paper provides a thorough investigation of a heat conduction problem that pertains to tolerance modelling in layered materials made up of multiple components. These media are functionally graded materials and thus have varying properties that affect their effectiveness. The proposed equations explain the conduction of heat in layered composites. The formulation involves partial differential equations, which utilise smooth and slowly varying functions. Notably, an extension of the unified tolerance modelling procedure is presented generalising existing models for two-component step-wise functionally graded materials (FGMs). This extension allows for the analysis of specific issues related to heat conduction in multi-component stratified composites with a transversal gradation of effective properties. This is the most important novelty achievement of the present paper because it will contribute to advancing knowledge and allows researchers, engineers, and practitioners to use the method in a broader context, addressing a more extensive set of real-world situations not limited to the number of component materials.</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"36 5","pages":"1393 - 1411"},"PeriodicalIF":1.9,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00161-024-01296-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140188694","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

Peridynamic simulation of creep deformation and damage 蠕变变形和损伤的周动态模拟

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-03-17 DOI: 10.1007/s00161-024-01295-3

Deepak Behera, Pranesh Roy, Erdogan Madenci

引用次数: 0

Exact solution of one problem of imposition of large deformations in a compound slab with pre-deformed layers of incompressible nonlinear elastic micropolar material 在带有不可压缩非线性弹性微波材料预变形层的复合板坯中施加大变形的一个问题的精确解法

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-03-16 DOI: 10.1007/s00161-024-01294-4

V. A. Levin, K. M. Zingerman, A. E. Belkin

{"title":"Exact solution of one problem of imposition of large deformations in a compound slab with pre-deformed layers of incompressible nonlinear elastic micropolar material","authors":"V. A. Levin, K. M. Zingerman, A. E. Belkin","doi":"10.1007/s00161-024-01294-4","DOIUrl":"10.1007/s00161-024-01294-4","url":null,"abstract":"<div><p>An exact solution is obtained for a new class of problems on the imposition of large deformations in nonlinear elastic micropolar bodies. The problem of determining the stress state in a compound slab having the shape of a rectangular parallelepiped, composed of pre-deformed layers and subjected to biaxial tension or compression is solved. The layers are made of isotropic incompressible nonlinear elastic micropolar materials. The layers are preliminarily deformed by straightening of circular cylindrical sectors. The solution is based on a class of universal deformations for isotropic incompressible nonlinear elastic micropolar materials. Numerical studies were carried out. The dependencies of stresses, resulting forces and moments on the parameters of initial and additional deformations are presented. Significant nonlinear effects are revealed. The influence of micropolar effects on the stress state has been studied. The solution can be used to verify software designed to numerically solve problems on the imposition of large deformations in bodies made of nonlinear elastic micropolar materials.</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"36 4","pages":"763 - 774"},"PeriodicalIF":1.9,"publicationDate":"2024-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140142068","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

Variable properties reconstruction for functionally graded thermoelectroelastic cylinder 功能分级热电弹性圆柱体的可变特性重构

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-03-13 DOI: 10.1007/s00161-024-01292-6

Alexander Vatulyan, Sergey Nesterov, Rostislav Nedin

{"title":"Variable properties reconstruction for functionally graded thermoelectroelastic cylinder","authors":"Alexander Vatulyan, Sergey Nesterov, Rostislav Nedin","doi":"10.1007/s00161-024-01292-6","DOIUrl":"10.1007/s00161-024-01292-6","url":null,"abstract":"<div><p>In this research, we present an approach to identify variable characteristics of an inhomogeneous thermoelectroelastic radially polarized elongated hollow cylinder. The cylinder’s thermomechanical characteristics depend on the radial coordinate. We consider two loading types for the cylinder—the mechanical and the thermal ones. The radial displacement is considered as the additional data collected on the outer cylinder’s surface under the first type load, while the temperature measured over a certain time interval is considered for the second type load. The direct problem after non-dimensioning and applying the Laplace transform is solved by jointly applying the shooting method and the transform inversion based on expanding the actual space in terms of the shifted Legendre polynomials. The effect of the laws of change in variable characteristics on the input data values taken in the experiment is analyzed. A nonlinear inverse problem on the reconstruction of the cylinder’s variable properties is formulated and solved on the basis of an iterative technique. The initial approximation is set in the class of positive bounded linear functions whose coefficients are determined from the condition of minimizing the residual functional. To find the corrections at each stage of the iterative process, the Fredholm integral equations of the first kind are solved by means of the Tikhonov method. A series of computational experiments on recovering one and two variable characteristics is conducted. The effect of coupling parameters and input noise on the reconstruction results is revealed.\u0000</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"36 4","pages":"745 - 762"},"PeriodicalIF":1.9,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140123875","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

Asymptotic behaviour for convection with anomalous diffusion 具有反常扩散的对流的渐近行为

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-03-06 DOI: 10.1007/s00161-024-01291-7

Brian Straughan, Antonio Barletta

引用次数: 0

Non-stationary elastic wave scattering and energy transport in a one-dimensional harmonic chain with an isotopic defect 带有同位素缺陷的一维谐波链中的非稳态弹性波散射和能量传输

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-03-04 DOI: 10.1007/s00161-024-01289-1

Serge N. Gavrilov, Ekaterina V. Shishkina

{"title":"Non-stationary elastic wave scattering and energy transport in a one-dimensional harmonic chain with an isotopic defect","authors":"Serge N. Gavrilov, Ekaterina V. Shishkina","doi":"10.1007/s00161-024-01289-1","DOIUrl":"10.1007/s00161-024-01289-1","url":null,"abstract":"<div><p>The fundamental solution describing non-stationary elastic wave scattering on an isotopic defect in a one-dimensional harmonic chain is obtained in an asymptotic form. The chain is subjected to unit impulse point loading applied to a particle far enough from the defect. The solution is a large-time asymptotics at a moving point of observation, and it is in excellent agreement with the corresponding numerical calculations. At the next step, we assume that the applied point impulse excitation has random amplitude. This allows one to model the heat transport in the chain and across the defect as the transport of the mathematical expectation for the kinetic energy and to use the conception of the kinetic temperature. To provide a simplified continuum description for this process, we separate the slow in time component of the kinetic temperature. This quantity can be calculated using the asymptotics of the fundamental solution for the deterministic problem. We demonstrate that there is a thermal shadow behind the defect: the order of vanishing for the slow temperature is larger for the particles behind the defect than for the particles between the loading and the defect. The presence of the thermal shadow is related to a non-stationary wave phenomenon, which we call the anti-localization of non-stationary waves. Due to the presence of the shadow, the continuum slow kinetic temperature has a jump discontinuity at the defect. Thus, the system under consideration can be a simple model for the non-stationary phenomenon, analogous to one characterized by the Kapitza thermal resistance. Finally, we analytically calculate the non-stationary transmission function, which describes the distortion (caused by the defect) of the slow kinetic temperature profile at a far zone behind the defect.</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"36 3","pages":"699 - 724"},"PeriodicalIF":1.9,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140032035","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 modified mathematical model for thermo-viscous thermal conduction incorporating memory-based derivatives and the Moore–Gibson–Thomson equation 包含基于记忆的导数和摩尔-吉布森-汤姆森方程的热粘性热传导修正数学模型

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-03-02 DOI: 10.1007/s00161-024-01284-6

Ahmed E. Abouelregal, Marin Marin, Sameh S. Askar, Abdelaziz Foul

{"title":"A modified mathematical model for thermo-viscous thermal conduction incorporating memory-based derivatives and the Moore–Gibson–Thomson equation","authors":"Ahmed E. Abouelregal, Marin Marin, Sameh S. Askar, Abdelaziz Foul","doi":"10.1007/s00161-024-01284-6","DOIUrl":"10.1007/s00161-024-01284-6","url":null,"abstract":"<div><p>Analyzing the viscoelastic characteristics of materials, especially polymers, is essential for understanding their mechanical properties and their capacity to function in different conditions. This paper presents a novel viscoelastic heat transfer model that integrates a memory-based derivative with the Moore–Gibson–Thomson (MGT) equation. The purpose is to examine the viscoelastic characteristics of materials and assess their response to external stresses and deformations over a certain period of time. In addition to incorporating the third-type thermoelastic model that Green and Naghdi provided, the derivation of this thermo-viscoelastic model included the integration of heat flow and its time derivative into Fourier’s equation. To verify and understand the proposed model, it was applied to consider an unbounded viscoelastic semi-space immersed in a uniform magnetic field and exposed to non-Gaussian laser radiation as a heat source. An analysis of computational results was conducted to evaluate how the behavior of the field variables under consideration is affected by viscoelastic coefficients and memory-based derived factors.</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"36 3","pages":"585 - 606"},"PeriodicalIF":1.9,"publicationDate":"2024-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140015413","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

Strain-gradient finite elasticity solutions to rigid bar pull-out test 刚性棒拉拔试验的应变梯度有限弹性解法

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-02-23 DOI: 10.1007/s00161-024-01285-5

Nasrin Rezaei, M. Erden Yildizdag, Emilio Turco, Anil Misra, Luca Placidi

引用次数: 0

Experimental studies and the model of anisotropic plasticity for additively manufactured stainless steel with stress state dependent properties 各向异性塑性的实验研究和应力状态依赖性添加制造不锈钢模型

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-02-22 DOI: 10.1007/s00161-024-01286-4

Alexey Fedorenko, Boris Fedulov, Stanislav Evlashin, Oleg Staroverov, Alexander Pankov, Svetlana Shalnova, Evgeny Lomakin

{"title":"Experimental studies and the model of anisotropic plasticity for additively manufactured stainless steel with stress state dependent properties","authors":"Alexey Fedorenko, Boris Fedulov, Stanislav Evlashin, Oleg Staroverov, Alexander Pankov, Svetlana Shalnova, Evgeny Lomakin","doi":"10.1007/s00161-024-01286-4","DOIUrl":"10.1007/s00161-024-01286-4","url":null,"abstract":"<div><p>In this study the mechanical anisotropy of laser powder bed fusion (LPBF) 316L stainless steel under tensile, compressive, and shear loading in different orientations with respect to the build direction is investigated. Experimental analysis revealed a moderate degree of anisotropy, which is mainly attributed to the build direction. In addition, the mechanical properties were seen to be dependent on the stress state, as evidenced by the tension-compression asymmetry. The anisotropy and asymmetry can be explained by various microstructural factors with texture orientation being one of the most significant. To incorporate such material behavior in structural analysis, a phenomenological model for anisotropic plasticity and tension-compression asymmetry was proposed and calibrated for additive 316L steel. The flexibility of the model allows it to be applied using a mechanical test set on uniaxial loading, and further enhancements may rely on data for combined stress state. The model was calibrated based on FEA of samples loading and fit well all experimental curves, though factors such as residual stresses and test imperfections could introduce some discrepancies.</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"36 3","pages":"619 - 637"},"PeriodicalIF":1.9,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139938773","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

Wave propagation with two delay times in an isotropic porous micropolar thermoelastic material 具有两个延迟时间的波在各向同性多孔微波热弹性材料中的传播

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-02-21 DOI: 10.1007/s00161-024-01287-3

D. M. Neagu, I. M. Fudulu, M. Marin, A. Öchsner

引用次数: 0