International Journal of Engineering Science最新文献

{"title":"High-frequency, finite-amplitude, acoustic traveling waves in bubbly liquids under the Crighton–Westervelt–Klein–Gordon equation","authors":"N. Valdivia ,&nbsp;P.M. Jordan","doi":"10.1016/j.ijengsci.2025.104295","DOIUrl":"10.1016/j.ijengsci.2025.104295","url":null,"abstract":"<div><div>Employing both analytical and numerical methodologies, we investigate the propagation of high-frequency, finite-amplitude, acoustic wave-forms in non-dissipative bubbly liquids under a (1D) PDE model, which we term the Crighton–Westervelt–Klein–Gordon (CWKG) equation. Exact traveling wave solutions (TWS)s for the pressure field are derived and analyzed. It is shown that the CWKG equation can admit both monotonic and periodic TWSs, but that only those of the latter type are bounded. Phase plane analyses of the traveling wave ODEs are performed, approximate expressions for the pressure field are derived, and special case results are identified and studied. We also point out a special/limiting case TWS that consists of (periodic) parabolic arcs with pointed peaks; discuss connections to three models, including the Korteweg–De Vries (KdV) equation, that describe well known types of water waves; and suggest possible follow-on studies.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"215 ","pages":"Article 104295"},"PeriodicalIF":5.7,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134695","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":"Wave propagation in compressible hyperelastic solids in the presence of powerless internal forces","authors":"Ada Amendola ,&nbsp;Julia de Castro Motta ,&nbsp;Luigi Vergori","doi":"10.1016/j.ijengsci.2025.104294","DOIUrl":"10.1016/j.ijengsci.2025.104294","url":null,"abstract":"<div><div>Although nonlinear elastodynamics has been widely studied since the second half of the last century, still nowadays, some aspects of this theory need a more systematic analysis. Based on the classical theory of simple materials of differential type and the results on the analytical form of constitutive models consistent with the laws of thermodynamics, we here analyze the wave propagation in compressible hyperelastic materials in the case in which the effects due to powerless internal forces are not negligible. We show that powerless internal forces affect the wave propagation in compressible hyperelastic solids by contributing to nonlinear wave dispersion and allowing the propagation of traveling waves.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"214 ","pages":"Article 104294"},"PeriodicalIF":5.7,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144099380","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":"Analytical solutions for predicting shear stresses in axially graded tapered beams","authors":"Giovanni Migliaccio ,&nbsp;Francesco D’Annibale","doi":"10.1016/j.ijengsci.2025.104292","DOIUrl":"10.1016/j.ijengsci.2025.104292","url":null,"abstract":"<div><div>This study investigates the state of stress in slender elastic cylinders with variable cross-sections and axially graded material properties. In contrast to prismatic homogeneous cylinders, the continuous variation of cross-sectional dimensions and material properties along the axis of the cylinder produces additional shear stress distributions within the cross-sections. This work sheds the light on how these stresses depend on the axial gradation of both geometry and material. The analytical approach in this paper is based on partial differential equations derived in a recent work that describe the stress state in tapered inhomogeneous elastic cylinders. A new analytical solution is presented for rectangular cross-sectioned tapered cylinders with axially graded material properties, subjected to external loads at the ends. By examining this paradigmatic case, the combined effects of taper and axial material gradation on the shear stresses across the cylinder’s cross-sections are discussed, highlighting the limitations of solutions obtained by approximating the geometric and material properties as piecewise constant along the cylinder’s axis. Numerical examples, including comparisons with benchmark solutions from a finite element method, are provided to support the analytical findings of the study. In addition to the theoretical insights, the analytical solutions developed here hold practical value in a wide range of engineering applications, such as aerospace structures, mechanical components, biomedical implants, energy harvesters, vibration control systems, and smart sensors for structural health monitoring.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"214 ","pages":"Article 104292"},"PeriodicalIF":5.7,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071195","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":"Orientation and shear mechanisms of finite deformation of the cell cytoskeleton","authors":"A.S. Nikitiuk,&nbsp;Yu.V. Bayandin,&nbsp;O.B. Naimark","doi":"10.1016/j.ijengsci.2025.104306","DOIUrl":"10.1016/j.ijengsci.2025.104306","url":null,"abstract":"<div><div>This study presents a novel statistical-thermodynamic framework to model the finite deformation of the eukaryotic cell cytoskeleton, emphasizing the roles of actin filament orientation and bundle sliding. By introducing internal variables, such as an orientation order parameter and a microshear strain, the model captures the nonlinear mechanical response of the cytoskeleton under shear stress, including finite strain and critical damage dynamics. The free energy of the system is derived as a function of these variables, temperature, and a structural parameter that acts as an \"effective temperature,\" reflecting the cytoskeleton's susceptibility to mechanical reorganization. Numerical simulations reveal distinct deformation regimes, from orientation ordering stage to failure, governed by the structural parameters. The results provide insights into the mechanobiology of cells, with potential applications in understanding pathological conditions and designing tissue engineering scaffolds.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"214 ","pages":"Article 104306"},"PeriodicalIF":5.7,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069345","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":"Unequal-biaxial taut states of functionally graded dielectric elastomers","authors":"Sankalp Gour ,&nbsp;Deepak Kumar ,&nbsp;Aman Khurana","doi":"10.1016/j.ijengsci.2025.104291","DOIUrl":"10.1016/j.ijengsci.2025.104291","url":null,"abstract":"<div><div>A thin dielectric elastomeric (DE) plate with thickness gradients deforms and wrinkles under applied voltages. Such wrinkling, with regular periodic patterns in thin functionally graded DEs, occurs to relax in-plane compressive stresses through out-of-plane deformations. These functionally graded DE-based soft actuators, primarily used in soft robotic applications, exhibit highly localized point loads compared to non-graded soft actuators. DE-based soft actuators frequently exhibit a variety of instabilities, which may adversely affect their functioning and trigger device failure. Conversely, fine-tuned wrinkles can be utilized proactively in specific applications, necessitating an intentional transformation with directional gradients and the truncation of biaxial deformations. This paper presents an experimentally verified continuum physics-based model under a special case for unequal-biaxial deformation in functionally graded DEs. The proposed model integrates classical tension field theory to predict thresholds in taut domains within the plane of principal stretches. The model solutions provide insight into the deviations of taut domains influenced by the graded parameter and the biaxiality ratio in unequal-biaxial deformations of wrinkle formations in this material class.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"214 ","pages":"Article 104291"},"PeriodicalIF":5.7,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143942361","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 ‘A midsurface elasticity model for a thin, nonlinear, gradient elastic plate’ [International Journal of Engineering Science 197 (2024) 104026]","authors":"C. Rodriguez","doi":"10.1016/j.ijengsci.2025.104297","DOIUrl":"10.1016/j.ijengsci.2025.104297","url":null,"abstract":"","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"214 ","pages":"Article 104297"},"PeriodicalIF":5.7,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144203588","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":"Rectangular finite elements for modeling the mechanical behavior of auxetic materials","authors":"Alexey V. Mazaev","doi":"10.1016/j.ijengsci.2025.104290","DOIUrl":"10.1016/j.ijengsci.2025.104290","url":null,"abstract":"<div><div>This paper is devoted to the exploration of rectangular finite elements’ ability to model the stress-strain state of isotropic and orthotropic materials with a negative Poisson’s ratio, known as auxetic materials. By employing linear elasticity in the plane stress formulation, the research evaluates the linear compatible and the quadratic incompatible shape functions in describing the mechanical behavior of auxetic materials within a displacement-based finite element method under static shear and indentation. Additionally, the analytical expression of an incompatible rectangular finite element is adapted to accommodate an orthotropic case. Hexachiral and re-entrant honeycomb structures, characterized by auxetic behavior, are modeled as continuous media with homogenized properties using analytical expressions for their effective material constants. The findings reveal that while the classical shape functions may be sufficient for displacement modeling, they are ineffective in accurately predicting the characteristic auxetic behavior and stress distributions in auxetic materials. In contrast, the incompatible shape functions prove to be effective in providing appropriate stress modeling in both cases. This work underscores the relevance of the incompatible rectangular finite elements in the analysis of advanced materials with a negative Poisson’s ratio. It provides computationally efficient approaches for the calculation of auxetic honeycomb structures and multilayer composites based on them.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"213 ","pages":"Article 104290"},"PeriodicalIF":5.7,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143942580","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":"Nonlinear elastic response of 2D materials under simultaneous in-plane strains and flexural deformations","authors":"Serge R. Maalouf ,&nbsp;Senthil S. Vel","doi":"10.1016/j.ijengsci.2025.104270","DOIUrl":"10.1016/j.ijengsci.2025.104270","url":null,"abstract":"<div><div>In this paper, we study the elastic response of 2D materials that are subjected to simultaneous in-plane strains and flexural deformations. A nonlinear elastic constitutive model is proposed for the in-plane and flexural deformations of 2D materials of arbitrary symmetries. The constitutive model consists of a series expansion of the strain energy density in terms of the strain and curvature components. The influence of in-plane symmetry and out-of-plane reflective symmetry on the number of linearly independent elastic constants is discussed. A methodology is presented for the evaluation of the elastic constants based on the proposed model. The strain energy is evaluated along rays in strain and curvature space to simulate different strain and curvature states of the materials. Subsequently, the elastic constants are systematically evaluated by curve fitting the proposed constitutive model to the sampled strain energy densities. The approach proposed to obtain the elastic constants is independent of the method used for calculating the strain energy density, e.g., classical interatomic potentials or density functional theory, as the curve fitting process is decoupled from the energy calculations. In the present work, the strain energies are evaluated using classical interatomic potentials. The atomic coordinates of the 2D materials are relaxed in a unit cell while preserving the applied strains and curvatures in order to evaluate the strain energy and, subsequently, the elastic constants. We analyze the nonlinear response of graphene to simultaneous strains and curvatures. Furthermore, we analyze black phosphorus which serves as a representative orthorhombic 2D material. The in-plane, flexural and coupling elastic constants are evaluated for both materials, and the effects of bending and twisting on the in-plane strains are studied. We investigate the effect of the in-plane strains on the effective flexural rigidities of the materials. It is found that a tensile strain causes a decrease in the bending rigidity of graphene. The flexural rigidities of black phosphorus are found to be less sensitive to in-plane strains than that of graphene.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"214 ","pages":"Article 104270"},"PeriodicalIF":5.7,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143922325","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":"Electrokinetic energy conversion efficiency in carbon nanotubes","authors":"Yongbo Liu ,&nbsp;Yongjun Jian","doi":"10.1016/j.ijengsci.2025.104263","DOIUrl":"10.1016/j.ijengsci.2025.104263","url":null,"abstract":"<div><div>The electrokinetic energy conversion (EKEC) of pressure driven flow in carbon nanotubes (CNTs) is of great interest due to its potential high conversion efficiency. The existing EKEC theories had made many simplified assumptions for this problem, such as the surface charge is fixed on the surface and can not move, the slip length is independent of pipe diameter and the surface charge density is decoupled from the solution concentration. In order to get more accurate conversion efficiency, the prior theoretical models of EKEC in CNTs are revised in this paper by focusing on the combined influence of surface charge mobility and tube diameter on slip length and conversion efficiency. In addition, the surface charge density is no longer viewed as a constant, but a function of solution concentration of the electrolyte solution inside the CNTs. Results show that considering the surface charge mobility will reduce the EKEC efficiency. However, the decrease of tube diameter could enhance the EKEC efficiency. In order to maximize the EKEC efficiency, we give the optimal values of corresponding parameters. The maximum EKEC efficiency obtained in this paper is 18.8 %, which is obtained for the pressure driven flow of a LiCl solution with a concentration of 2 mM through a CNT with a radius of 15 nm.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"213 ","pages":"Article 104263"},"PeriodicalIF":5.7,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859748","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":"Utilization of the quadratic Hill yield function to model Ti-6Al-4V within multiplicative finite strain kinematics","authors":"Jakob Platen,&nbsp;Johannes Storm,&nbsp;Michael Kaliske","doi":"10.1016/j.ijengsci.2025.104268","DOIUrl":"10.1016/j.ijengsci.2025.104268","url":null,"abstract":"<div><div>In the contribution at hand, the quadratic Hill yield function is extended to a finite strain, multiplicative kinematic framework. Furthermore, it is expanded by a novel combination of linear and exponential hardening. The formulation is derived in a consistent manner. Subsequently, the capabilities to model Ti-6Al-4V in a realistic manner are demonstrated, considering the anisotropy in plastic material behavior, which is induced by additive manufacturing. Therefore, different tensile tests from the literature are simulated, and a validation is carried out. Finally, the significance of the anisotropy is demonstrated in a numerical example. The maximal force obtained in the simulation is shown to be significantly different, if the building direction is considered.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"213 ","pages":"Article 104268"},"PeriodicalIF":5.7,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864748","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}