International Journal of Engineering Science最新文献

{"title":"Mechanical behaviors of closed-cell fluid-filled porous media with surface effects","authors":"Chenlei Yu ,&nbsp;Fei Ti ,&nbsp;Yihang Zhang ,&nbsp;Zhao Bai ,&nbsp;Runpei Yu ,&nbsp;Yifan Liu ,&nbsp;Xiangjun Peng ,&nbsp;Cunxi Dai ,&nbsp;Yongli Zhang ,&nbsp;Xin Chen","doi":"10.1016/j.ijengsci.2025.104420","DOIUrl":"10.1016/j.ijengsci.2025.104420","url":null,"abstract":"<div><div>The mechanical behaviors of closed-cell fluid-filled porous media (CFPM) with surface effects between fluid and solid matrix have been attracting researchers’ interest over the past decades. However, current theoretical and numerical methods mainly focus on the small deformation behaviors of the CFPM with uniform pore size, while neglecting several important features, such as the non-uniform distribution of pore sizes and finite deformation. These features, which are common in engineering materials like foams and soft composites, play a crucial role in their overall performance. In this paper, we propose a user-friendly simulation method in the commercial finite element software Comsol based on the weak form formulation of the problem with surface effects incorporated. We validate this method by comparing it with the theoretical solution of the deformation near a single fluid inclusion with surface effects. Predictions of our model demonstrate that surface tension inhibits the deformation of the fluid inclusion, resulting in three distinct states: normal state, growth state, and shrinkage state. Next, we employ a homogenization method to develop an approximate theoretical solution for dual-scale CFPM and examine their equivalent mechanical properties. The shear modulus of dual-scale CFPM is influenced by the compressibility of the internal fluids, in contrast to CFPM with single-sized pores. This effect arises primarily from the different deformation modes of pores at varying scales with the same surface tension, which is verified by the two-level homogenization solution. We also examined the mechanical properties of CFPM with Gaussian-distributed pore sizes, finding that surface effects are inhibited compared to single-pore-size CFPM, especially as the standard deviation of pore radii increases. Finally, we investigated the industry challenge of finite deformation of CFPM with surface effects, the approach demonstrates that the Neo-Hookean model predicted by the microstructure, based on existing effective moduli, remains accurate up to 50% strain for multiple loading cases. These results provide theoretical support and technical guidance for engineers in structural design, process optimization, and performance prediction of CFPM.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"219 ","pages":"Article 104420"},"PeriodicalIF":5.7,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145527770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Predicting thrombus formation and growth in patient-specific models of aortic dissection: a multiphase approach based on porous media theory","authors":"Xiaofan Li ,&nbsp;Xuehuan Zhang ,&nbsp;Yuan Xue ,&nbsp;Xuyang Zhang ,&nbsp;Linyu Qin ,&nbsp;Xiaoyu Yang ,&nbsp;Jiang Xiong ,&nbsp;Chiyu Xie ,&nbsp;Shuaitong Zhang ,&nbsp;Duanduan Chen","doi":"10.1016/j.ijengsci.2025.104423","DOIUrl":"10.1016/j.ijengsci.2025.104423","url":null,"abstract":"<div><div>Aortic dissection represents a life-threatening vascular emergency with significant morbidity and mortality. Traditional models for predicting aortic thrombosis often depend on complex biochemical parameters, lack clearly defined phase interfaces, and require extensive computational time. Existing porous media algorithms are limited in their ability to accurately capture the dynamic processes of thrombus growth and hemodynamic changes, largely due to imprecise physical formulations. This study presents a novel multiphase porous media approach for predicting thrombus formation in various types of aortic dissection, which is innovatively applied to a large number of patient-specific aortic models. By incorporating an extended Darcy–Brinkman–Stokes (DBS) equation to explicitly model the interaction between solid and liquid phases, and introducing a novel porosity equation to simplify platelet transport and deposition, the method achieves substantial improvements in computational efficiency. Applied to computed tomography-based reconstructions, the algorithm demonstrated high predictive accuracy, achieving a correlation coefficient of 0.97 between predicted and actual thrombus volumes in 12 cases of partial false lumen and 9 cases of complete false lumen. The average prediction time per case was reduced to 40 min, representing a 70 % improvement in efficiency. Furthermore, the study investigated mechanical factors underlying enhanced postoperative recovery in patients with complete false lumens and introduced an acceleration factor to align simulation time with actual thrombus progression. By integrating a mechanically grounded thrombus evolution model, this method enables rapid, dynamic predictions, thereby supporting timely clinical decision-making and facilitating the development of personalized treatment strategies for patients with aortic dissection.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"219 ","pages":"Article 104423"},"PeriodicalIF":5.7,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145567900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanics of re-damage and re-healing in continuum damage and healing mechanics of materials","authors":"George Z. Voyiadjis,&nbsp;Peter I. Kattan","doi":"10.1016/j.ijengsci.2025.104432","DOIUrl":"10.1016/j.ijengsci.2025.104432","url":null,"abstract":"<div><div>This work presents a unified thermodynamic framework that incorporates primary and secondary damage and healing variables, enabling the modeling of re-damage and re-healing under cyclic loading. The damage is characterized by the reduction in stiffness of the material and other material properties. A new secondary damage variable is introduced that may account for re-damage of the healed material. This addresses damage and healing after the initial or subsequent damage/healing occurred. It is a consequence of reloading the material or structure. This is then followed by the introduction of a new secondary healing variable that may account for the re-healing of the damaged material. This process may continue indefinitely in a continuous manner. These ideas and new concepts are explored here based on sound mathematical and thermodynamic treatment. It should be noted that the idea of re-damage of the healed material has appeared previously in the literature, but here it is afforded a consistent and systematic mathematical treatment. This allows for the proper physical interpretation that accounts for damage/healing occurring in subsequent unloading/reloading sequences. Both the scalar and tensorial formulations are presented. Finally, as an example, the problem of plane stress, plane damage, and plane healing is illustrated in detail. Two application examples from the aerospace industry are illustrated. Comparisons with experimental observations with two different materials are also shown. In the two materials investigated, plastic deformation is involved and is accounted for in the model as well as in the thermodynamics section.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"219 ","pages":"Article 104432"},"PeriodicalIF":5.7,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145611954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effect of wall thickness on the scattering of electromagnetic waves by open-ended rectangular cavities","authors":"Oğuzhan Demiryürek,&nbsp;Filiz Bi̇rbi̇r Ünal","doi":"10.1016/j.ijengsci.2025.104419","DOIUrl":"10.1016/j.ijengsci.2025.104419","url":null,"abstract":"<div><div>The scattering of electromagnetic waves by an infinitely long rectangular cavity with finite wall thickness is rigorously analyzed for E-polarization by developing a modified Wiener–Hopf formulation that extends the classical procedure to non-canonical geometries. The finite wall thickness introduces additional waveguide sections and coupling interfaces, which break the half-plane geometry underlying the standard Wiener–Hopf procedure. To overcome this challenge, the problem is reformulated as a system of modified Wiener–Hopf equations of the third kind (MWHE-3) by integrating the mode-matching technique within the cavity and wall regions. The resulting formulation accommodates the multiple reflections and modal interactions introduced by thick walls while preserving the mathematical rigor and edge condition satisfaction characteristic of the Wiener–Hopf approach. The solution involves coupled infinite systems of linear algebraic equations, efficiently solved through truncation. The scattered field is then evaluated using the inverse Fourier transform and saddle-point techniques. Numerical examples demonstrate the influence of wall thickness on the diffraction characteristics.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"219 ","pages":"Article 104419"},"PeriodicalIF":5.7,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145559751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rayleigh waves within Eringen’s nonlocal elasticity theory: Use of modified kernels","authors":"P.A. Martin","doi":"10.1016/j.ijengsci.2025.104398","DOIUrl":"10.1016/j.ijengsci.2025.104398","url":null,"abstract":"<div><div>Eringen’s original linear theory of nonlocal elasticity involves integral operators. We apply a modified version of this theory to the problem of waves in an elastic half-space. The modification ensures that the traction-free conditions on the flat boundary are incorporated into the choice of kernels in the integral operators. We solve the governing equations exactly and show that the resulting solutions do not represent surface waves.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"218 ","pages":"Article 104398"},"PeriodicalIF":5.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145360523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Eulerian formulation of a size-dependent anisotropic non-Newtonian viscous Cosserat fluid","authors":"M.B. Rubin","doi":"10.1016/j.ijengsci.2025.104418","DOIUrl":"10.1016/j.ijengsci.2025.104418","url":null,"abstract":"<div><div>An Eulerian formulation of a size-dependent three-dimensional Cosserat continuum is developed for purely mechanical response of an anisotropic non-Newtonian viscous Cosserat fluid. The constitutive equations are Eulerian in the sense that they depend only on quantities that can be determined in the current state of the fluid. The Cosserat theory admits a triad of linearly independent deformable directors vectors at each material point, which are determined by higher-order balances of director momentum. It is shown that the balance of angular momentum of the Cosserat fluid imposes a non-trivial restriction on coupling between kinetic and kinematic variables that is satisfied by the proposed constitutive equations. An analytical solution of anisotropic Newtonian viscous fluid flow in a channel demonstrates size-dependence of the pressure driving the flow that is not present in the standard solution of a simple viscous fluid.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"218 ","pages":"Article 104418"},"PeriodicalIF":5.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145463872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Water hammer runs in elastically supported pipeline and the impact of system vibrations on pressure amplitudes reduction","authors":"Slawomir Henclik,&nbsp;Waldemar Janicki","doi":"10.1016/j.ijengsci.2025.104400","DOIUrl":"10.1016/j.ijengsci.2025.104400","url":null,"abstract":"<div><div>Energy transfers and dissipation are important factors within water hammer (WH) runs allowing to reduce pressure amplitudes and other undesired effects like pipeline stresses and vibration. Friction between viscous liquid and pipe walls was a primary identified and accounted effect however, energy can be also dissipated in the structure. A mechanism considered commonly by scientists are internal losses in pipe material. Broader dissipation possibilities appear when the pipeline system is significantly elastic and dynamic fluid structure interaction (FSI) takes place. Among other behaviors, energy can be lost at viscoelastic pipe supports, then. An initial motivation of this study was a detail understanding of a specific result established within WH-FSI experiments conducted at a laboratory pipeline fixed with elastic supports. It was found that reduction of WH pressures in time was faster for a pipeline fixed with less rigid supports. An important remark on this effect is, that elastic elements used in experiments had similar and small damping properties. Explanations of this behavior are proposed and analyzed in this study. One of them is a slip damping mechanism, which can appear at the supports. Logarithmic damping decrement (LDD) is used as a measure of WH amplitudes reduction. An original and novel concept presented is a development and verification of analytical formula for LDD of WH pressure oscillations in a quasi-rigid pipeline, produced by quasi-static hydraulic losses. Additional analyses of measured results, discussion and conclusions are presented in the paper, as well.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"218 ","pages":"Article 104400"},"PeriodicalIF":5.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145360524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of a versatile indoor framework for the measurement of tyre compound friction and wear","authors":"Andrea Genovese,&nbsp;Guido Napolitano Dell’Annunziata,&nbsp;Emanuele Lenzi,&nbsp;Aleksandr Sakhnevych,&nbsp;Francesco Timpone,&nbsp;Flavio Farroni","doi":"10.1016/j.ijengsci.2025.104402","DOIUrl":"10.1016/j.ijengsci.2025.104402","url":null,"abstract":"<div><div>Maximising tyre performance requires balancing conflicting targets, grip, wear resistance, and rolling efficiency, while accelerating development. In this context, tribological characterisation at compound level supports faster prototyping and reduces reliance on full-scale testing. Although standards for rubber friction testing exist, they are rarely followed in literature, and procedures are often underreported. This work addresses that gap by presenting the complete development of an experimental framework for rubber friction and wear testing, with particular focus on tyre tread compound, from the definition of functional requirements to the design of a novel linear friction tester and the implementation of a robust testing methodology. The Ground Rubber Interface Performance (GRIP) tester was designed for high versatility and cost-effectiveness. A key feature is the open-access architecture, which allows practical surface management and rapid retooling. A custom back-heating system ensures uniform specimen temperature even under varying test conditions. The methodology focuses on critical but overlooked aspects: specimen conditioning, surface rubberisation, and temperature control. Case studies demonstrate the repeatability of results and the system’s sensitivity to key input parameters. Additional tests confirm the platform’s adaptability to non-tyre tribological applications.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"218 ","pages":"Article 104402"},"PeriodicalIF":5.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145326826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to ‘Lagrangian theory of extensible elastica with arbitrary undeformed shape’ [International Journal of Engineering Science 217 (2025) 104383]","authors":"Alessandro Taloni ,&nbsp;Daniele Vilone ,&nbsp;Giuseppe Ruta","doi":"10.1016/j.ijengsci.2025.104408","DOIUrl":"10.1016/j.ijengsci.2025.104408","url":null,"abstract":"","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"218 ","pages":"Article 104408"},"PeriodicalIF":5.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145532006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance analysis of an aerostatic thrust bearing lubricated by supercritical CO2 utilizing Elrod-Ng turbulence model","authors":"Yuntang Li,&nbsp;Zhitong Sun,&nbsp;Cong Zhang,&nbsp;Jie Jin,&nbsp;Yuan Chen,&nbsp;Bingqing Wang,&nbsp;Juan Feng","doi":"10.1016/j.ijengsci.2025.104407","DOIUrl":"10.1016/j.ijengsci.2025.104407","url":null,"abstract":"<div><div>An aerostatic thrust bearing lubricated by supercritical carbon dioxide (ATB-SCO₂) is ideal axial support component for the rotating shaft of an SCO₂ cycle power generator. However, little literature is related to the performance analysis of an ATB-SCO₂ and laminar model is commonly used, leading to significant errors in bearing performance predictions. In this article, the modified Reynolds equation based on Elrod-Ng turbulence model and orifice discharge equation are combined and solved by finite difference method for calculating the static performance of an ATB-SCO₂. Moreover, the turbulence effect on ATB-SCO₂ static performance is investigated by analyzing the flow field characteristics in lubricating film. The results indicate that SCO₂ on thrust plate is in a turbulent state. Load capacity and stiffness calculated by turbulence model are larger while mass flow rate is lower compared to those of obtained by laminar model. The fluid velocity varies steeply near-wall and smoothly in middle of lubricating film due to the increased effective viscosity in middle of lubricating film. Load capacity and stiffness increase with the increase of supply pressure and rotational speed, and decrease with the growth of film thickness. Furthermore, the static performance of an ATB-SCO₂ is significantly influenced by pressure-equalizing groove depth (when the depth is &lt;50 µm) and restrictor number, and the effects of pressure-equalizing groove width can be neglected.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"218 ","pages":"Article 104407"},"PeriodicalIF":5.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145463871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}