Acta Mechanica最新文献_第3页

Orthotropic viscoelastic creep in cellular scaffolds 细胞支架的正交异性粘弹性蠕变

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-11-08 DOI: 10.1007/s00707-025-04568-3

Alessia Ferrara, Falk K. Wittel

引用次数: 0

Magnetohydrodynamic effects on dusty micropolar fluid over an elastic surface: exact solutions and thermal behavior 弹性表面上尘埃微极流体的磁流体动力学效应：精确解和热行为

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-11-06 DOI: 10.1007/s00707-025-04569-2

Waqar Khan Usafzai, Nur Syahira Wahid, Norihan Md Arifin, Rusya Iryanti Yahaya, Emad H. Aly, Ioan Pop

{"title":"Magnetohydrodynamic effects on dusty micropolar fluid over an elastic surface: exact solutions and thermal behavior","authors":"Waqar Khan Usafzai, Nur Syahira Wahid, Norihan Md Arifin, Rusya Iryanti Yahaya, Emad H. Aly, Ioan Pop","doi":"10.1007/s00707-025-04569-2","DOIUrl":"10.1007/s00707-025-04569-2","url":null,"abstract":"<div><p>This study investigates the magnetohydrodynamic flow of a dusty micropolar fluid along a deformable permeable elastic surface, accounting for the effects of wall mass flux, microrotation, and fluid-particle interactions. Through an analytical approach, the existence of unique, dual, and triple solutions for velocity, skin friction, and thermal profiles is established. The findings demonstrate that for a stretching surface, a unique solution is maintained for the suction case, whereas for a shrinking surface, dual or triple solutions emerge depending on the suction or injection parameter. Notably, a critical mass flux value is identified, below which no physical solution exists. The study further highlights that increasing the fluid-particle interaction parameter enhances velocity profiles for both stretching and shrinking cases. Moreover, strong suction leads to multiple temperature solution branches, reflecting the complex thermal behavior in micropolar dusty fluids. The influence of a magnetic field is found to enhance both velocity and temperature distributions. These findings provide critical insights for controlling particle deposition and heat transfer in advanced manufacturing processes like polymer sheet extrusion and MHD-based coating technologies. The identified multiple solutions and critical thresholds offer direct design principles for optimizing system performance and avoiding operational failure in industrial applications involving micropolar dusty fluids.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"237 4","pages":"1417 - 1430"},"PeriodicalIF":2.9,"publicationDate":"2025-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147588372","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

Nonlocal hydraulic-thermo-poro-visco-elastic transient impact responses of non-Gaussian laser-heated temperature-dependent saturated cylindrical unlined tunnel 非高斯激光加热温度相关饱和圆柱无衬砌隧道非局部水热孔粘弹性瞬态冲击响应

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-11-06 DOI: 10.1007/s00707-025-04575-4

Chenlin Li, Dechen Wang, Liangcheng Zheng

{"title":"Nonlocal hydraulic-thermo-poro-visco-elastic transient impact responses of non-Gaussian laser-heated temperature-dependent saturated cylindrical unlined tunnel","authors":"Chenlin Li, Dechen Wang, Liangcheng Zheng","doi":"10.1007/s00707-025-04575-4","DOIUrl":"10.1007/s00707-025-04575-4","url":null,"abstract":"<div><p>The extensive applications of the laser thermal rock-breaking technology in the tunnel and underground engineering lead to the numerous studies on the dynamic hydraulic-thermo-poro-visco-elastic responses. However, the inherent nonlocal effects of deformation and heat transport in such condition are still not considered. To address such deficiency, this work develops the nonlocal hydraulic-thermo-poro-visco-elastic model based on Eringen’s stress gradient elasticity theory and the Guyer–Krumhansl (GK) heat conduction law. The newly established model is applied to investigate the transient impact responses of the temperature-dependent saturated cylindrical unlined tunnel subjected to the non-Gauss laser via the Laplace transformation associated with Kirchhoff-integral technique. The dimensionless results reveal that the thermal nonlocal parameter accelerates the propagation of temperature while reducing the poro-water pressure response. Meanwhile, the elastic strain gradient parameter lowers the stress peak and makes the displacement curves smoother.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"237 4","pages":"1431 - 1459"},"PeriodicalIF":2.9,"publicationDate":"2025-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147588382","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

Electroelastic instability of viscoelastic fluid past single and double microcylinders in a channel 粘弹性流体在通道中通过单微柱和双微柱时的电弹性不稳定性

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-11-06 DOI: 10.1007/s00707-025-04576-3

Mohd Bilal Khan

{"title":"Electroelastic instability of viscoelastic fluid past single and double microcylinders in a channel","authors":"Mohd Bilal Khan","doi":"10.1007/s00707-025-04576-3","DOIUrl":"10.1007/s00707-025-04576-3","url":null,"abstract":"<div><p>This study investigates the electroosmotic flow of viscoelastic fluids past single and double microcylinders confined in a microchannel using numerical simulations based on the Oldroyd-B constitutive model coupled with the Poisson–Boltzmann equation. The governing equations were solved in OpenFOAM over a broad range of conditions: Weissenberg number, <span>(1< Wi < 20)</span>; electrical field strength, <span>(33333< E_{x} < 66{,}666)</span> V/m; wall zeta potential, <span>(-5<zeta < 30)</span> <i>mV</i>, blockage ratio, <span>(0.4<BR<0.45)</span>; and intercylinder gap, <span>(1.5<S<2.5)</span>. For a single cylinder, flow remains steady at low Weissenberg numbers but becomes unstable beyond a critical value, exhibiting electroelastic instabilities that intensify with increasing blockage ratio, electric field strength, and wall zeta potential. In the double cylinder configuration, the flow is steady and symmetric at low elasticity but transitions to unsteady and aperiodic motion at high Weissenberg numbers, with the degree of instability decreasing as the intercylinder gap widens. The results provide a mechanistic understanding of how geometric confinement, electrokinetic forcing, and fluid elasticity collectively govern flow transition and vortex dynamics in electroosmotic microflows. These findings offer guidance for designing microfluidic systems that either exploit or suppress electroelastic instabilities for efficient mixing and controlled transport of complex fluids.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"237 4","pages":"1461 - 1480"},"PeriodicalIF":2.9,"publicationDate":"2025-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147588371","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

Lode dependence incorporating the Mohr-Coulomb deviatoric section 含莫尔-库仑偏移截面的矿脉关系

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-11-05 DOI: 10.1007/s00707-025-04570-9

Giuseppe Mortara

引用次数: 0

An extended thermodynamic model for dilute granular gases 稀颗粒气体的扩展热力学模型

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-11-05 DOI: 10.1007/s00707-025-04572-7

Elvira Barbera, Annamaria Pollino

引用次数: 0

Magneto-thermoelastic vibration analysis to a FG aluminum-based microbeam reinforced by GPLs based on nonlocal strain gradient theory and MGT generalized thermoelasticity 基于非局部应变梯度理论和广义热弹性理论的gpl增强FG铝基微梁磁热弹性振动分析

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-11-05 DOI: 10.1007/s00707-025-04577-2

Liang Ren, Xinhai Zhang, Ji Meng, Tianhu He

{"title":"Magneto-thermoelastic vibration analysis to a FG aluminum-based microbeam reinforced by GPLs based on nonlocal strain gradient theory and MGT generalized thermoelasticity","authors":"Liang Ren, Xinhai Zhang, Ji Meng, Tianhu He","doi":"10.1007/s00707-025-04577-2","DOIUrl":"10.1007/s00707-025-04577-2","url":null,"abstract":"<div><p>To realize easy production and optimize the overall performances, nanocomposite structures made of graphene platelets (GPLS)-reinforced materials are usually functionally graded (FG). The FG distribution patterns of the fillers are commonly categorized into FG-A, FG-X and FG-O types. To promote engineering applications, a series of investigations on structural responses of FG nanocomposite structures have been conducted. Nevertheless, of them, the studies within the generalized thermoelastic theories remain limited, especially for microstructures. To bridge this gap, the magneto-thermoelastic vibration of a FG multilayer microbeam composed of an aluminum matrix reinforced by GPLs is considered in this study. The problem is formulated by incorporating the Euler–Bernoulli beam model, the Moore–Gibson–Thompson (MGT) generalized thermoelastic theory, the surface elasticity theory, and the nonlocal strain gradient theory along with the Maxwell’s equations. To assess the effective elastic modulus as well as other material properties, the Halpin–Tsai micromechanics model, and the mixture law are employed. Then, the governing equations are solved by using Navier’s method and the frequency of the microbeam is obtained. In calculation, parametric studies are carried out to examine the influences the distribution patterns of GPLs, the material length-scale parameter, the surface effect, the nonlocal elasticity parameter, the GPLs mass fractions, and the magnetic field parameter on the vibrational response. The FG-X material distribution achieves the highest vibration frequency due to optimal reinforcement. The inclusion of material length-scale parameter and surface effect greatly improves microbeam stiffness and vibration performance. An external magnetic field further increases the frequency by enhancing structural rigidity.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"237 3","pages":"1375 - 1397"},"PeriodicalIF":2.9,"publicationDate":"2025-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147337046","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

Numerical simulation of density-dependent saltwater intrusion in sandbox model 沙盒模型中密度相关盐水入侵的数值模拟

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-11-04 DOI: 10.1007/s00707-025-04566-5

Sinchan Roy Chowdhury, Anirban Dhar

{"title":"Numerical simulation of density-dependent saltwater intrusion in sandbox model","authors":"Sinchan Roy Chowdhury, Anirban Dhar","doi":"10.1007/s00707-025-04566-5","DOIUrl":"10.1007/s00707-025-04566-5","url":null,"abstract":"<div><p>Numerical simulation is a widely adopted tool for understanding saltwater intrusion in coastal aquifers, simulating density-driven solute transport processes in porous media. However, most of these simulations exclusively model only groundwater flows and are mesh-based solvers, which may pose challenges for complex geometries. Here in this paper, we present an incompressible smoothed particle hydrodynamics (ISPH)-based combined surface–groundwater flow model for predicting density-driven flows in aquifers. The model consists of a modified momentum equation solution for less restrictive Courant–Friedrichs–Lewy (CFL) conditions when dealing with low-permeability sediments and taking into account viscosity variation. The developed ISPH code is validated using two benchmark problems to ensure acceptable performance with regard to the model’s ability to simulate physics of flow through porous media and density-driven flows. Simulations are performed for an unconfined and confined aquifer spanning a time period of 7320 s and 5220 s, respectively, the obtained numerical results were compared with experimental solute transport observations, and they were found to be in close agreement with each other. The calibrated hydraulic conductivity and dispersivity values are significantly lower than values obtained from solvers that simulate only groundwater flows, and our numerically calibrated values are much closer to real-world values for porous media.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"237 3","pages":"1341 - 1360"},"PeriodicalIF":2.9,"publicationDate":"2025-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147336708","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

Thermoelastic response in skin tissue exposed to laser radiation via the Moore–Gibson–Thompson model containing higher-order memory-dependent derivatives 皮肤组织暴露于激光辐射中的热弹性响应，通过包含高阶记忆依赖导数的Moore-Gibson-Thompson模型

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-11-01 DOI: 10.1007/s00707-025-04519-y

Sami F. Megahid

{"title":"Thermoelastic response in skin tissue exposed to laser radiation via the Moore–Gibson–Thompson model containing higher-order memory-dependent derivatives","authors":"Sami F. Megahid","doi":"10.1007/s00707-025-04519-y","DOIUrl":"10.1007/s00707-025-04519-y","url":null,"abstract":"<div><p>To mitigate the risks associated with laser radiation and heat loading, it is critical to understand the biothermal response of skin tissue. With this information, the medical community can develop safe, evidence-based treatments for a variety of skin conditions. In this study, the Moore–Gibson–Thompson concept with memory-dependent higher derivatives is used to develop a theoretical basis for biothermal analysis. Clarifying the biothermal responses of skin tissues to heat loading and laser radiation is the aim of this work. Estimating the efficiency of biothermal transfer in biological tissues and predicting the thermal reactions that take place in human skin are made simpler by the developed model. A one-dimensional skin layer is used to achieve the suggested model. Laplace transforms are used to provide the analytical outcomes for tissue temperature. The proposed model incorporates both the impact of the kernel function and the thermal damage. Additionally, to evaluate the accuracy of the suggested model, the resulting analytical outcomes are contrasted with recognized theories. The results demonstrate that the modified Moore–Gibson–Thomson biothermal transfer model forecasts reduced temperatures than the traditional Pennes model when the memory-dependent upper derivatives and the thermal relaxation time constant are added.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"237 3","pages":"1317 - 1339"},"PeriodicalIF":2.9,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00707-025-04519-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147336068","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

Vibration-based analysis of a sandwich gori composite curved beam in thermo-electro-magnetic environment 热电磁环境下夹层复合材料弯曲梁的振动分析

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-10-28 DOI: 10.1007/s00707-025-04526-z

Mohanad Hatem Shadhar, Zaid A. Mohammed, Ali A. Rajhi, A. K. Dasarathy, Priyadarshi Das, R. Padmapriya, Jagdeep Singh, Bekzod Matyakubov, Uchkun Kutliev, Aseel Smerat

{"title":"Vibration-based analysis of a sandwich gori composite curved beam in thermo-electro-magnetic environment","authors":"Mohanad Hatem Shadhar, Zaid A. Mohammed, Ali A. Rajhi, A. K. Dasarathy, Priyadarshi Das, R. Padmapriya, Jagdeep Singh, Bekzod Matyakubov, Uchkun Kutliev, Aseel Smerat","doi":"10.1007/s00707-025-04526-z","DOIUrl":"10.1007/s00707-025-04526-z","url":null,"abstract":"<div><p>A parametric analysis of the nanocomposite-reinforced sandwich beam with initial curvature is presented. The kinematic, constitutive and governing relations are extended based on the higher-order stretching included, generalized Hooke’s law and virtual work principle, respectively. The sandwich nanocomposite is assumed composed of the graphene origami-reinforced nanocomposite core between two piezoelectric/piezomagnetic layers actuated by initial electric/magnetic potentials. The effective form of the material characteristics is developed using the Halpin–Tsai micromechanical model and rule of mixture for stiffness, and density/Poisson’s ratio/heat expansion coefficient, respectively. The multi-filed hybrid formulation is presented in terms of multi-field components. The parametric solution is presented in order to seek the impact of material constituent and multi-field loading characteristics. The results of the present work can be used for controllable and tuneable design of nanocomposite-reinforced structures. The novelties of this work is investigating the impact of graphene origami characteristics and initial electric/magnetic potentials on the vibrational responses of the sandwich curved beam. Because of the temperature/foldability/content-dependent material properties of the graphene origami included sandwich structure, the vibrational responses reflect the un-predictable responses.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"237 3","pages":"1289 - 1316"},"PeriodicalIF":2.9,"publicationDate":"2025-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147342635","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