International Journal of Engineering Science最新文献_第2页

Analytical study to control phase gradient in elastic meta-interface for wave mode conversions 波型转换弹性元界面中相位梯度控制的解析研究

IF 5.7 1区工程技术

International Journal of Engineering Science Pub Date : 2025-09-23 DOI: 10.1016/j.ijengsci.2025.104388

Mohammad Daud, Jongmin Shim

{"title":"Analytical study to control phase gradient in elastic meta-interface for wave mode conversions","authors":"Mohammad Daud, Jongmin Shim","doi":"10.1016/j.ijengsci.2025.104388","DOIUrl":"10.1016/j.ijengsci.2025.104388","url":null,"abstract":"<div><div>We present an analytical and design framework for achieving efficient elastic wave mode conversion across meta-interfaces governed by Generalized Snell’s Law (GSL), which prescribes wave motion based on a spatial phase gradient along the interface. In contrast to conventional optimization-based approaches, our method provides clear physical insight into the mechanism of pressure-to-shear wave conversion through a simplified one-dimensional axial wave model with the transfer matrix approach. This model yields analytical expressions for geometric conditions and identifies the relevant design parameter space. Based on this framework, we propose a compact chiral-pattern subunit with a frequency-scalable geometry, enabling straightforward implementation across a range of wave conditions. Full-scale numerical simulations confirm that the resulting meta-interface achieves strong mode conversion performance and accurately reproduces key phenomena including transmitted angles. Additionally, we demonstrate symmetric transmission by introducing mirrored phase gradients, further validating the flexibility of the GSL-based design. While the conversion efficiency is constrained by angular limits inherent to the material’s Poisson ratio, the framework provides a foundation for future improvements. This work bridges analytical modeling and practical design, offering an interpretable and scalable approach to engineered wave manipulation.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"217 ","pages":"Article 104388"},"PeriodicalIF":5.7,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145117687","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}

引用次数: 0

Wave dynamics in the drift-flux two-phase flow model 漂通量两相流模型中的波动动力学

IF 5.7 1区工程技术

International Journal of Engineering Science Pub Date : 2025-09-22 DOI: 10.1016/j.ijengsci.2025.104385

Sumanta Shagolshem , Dia Zeidan , K.V. Nagaraja

{"title":"Wave dynamics in the drift-flux two-phase flow model","authors":"Sumanta Shagolshem , Dia Zeidan , K.V. Nagaraja","doi":"10.1016/j.ijengsci.2025.104385","DOIUrl":"10.1016/j.ijengsci.2025.104385","url":null,"abstract":"<div><div>The present study provides a comprehensive symmetry analysis for a simplified two-phase flow model with the logarithmic equation of state. Under a one-parameter Lie group of transformations, we generate the local symmetry of the model, preserving the invariance of the system. Subsequently, we classify one-dimensional optimal subalgebras, which is a systematic framework for computing invariant solutions efficiently. With the characteristic method, we developed explicit solutions for the model utilizing the optimal subalgebras. Further, we prove that nonlocal symmetries exist for the considered model, and then some new exact solutions were developed where local symmetries cannot provide. Furthermore, the existence of the nonlinear self-adjointness property of the model is demonstrated with the construction of conservation laws. This study concludes by examining the complex hyperbolic nature, such as <span><math><msup><mrow><mi>C</mi></mrow><mrow><mn>1</mn></mrow></msup></math></span>-wave, characteristic shock, and their interaction with one of the solutions derived from nonlocal symmetry, highlighting the critical wave dynamics of the model.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"217 ","pages":"Article 104385"},"PeriodicalIF":5.7,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145117688","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}

引用次数: 0

Symmetric band structure preserving finite element model updating problem for undamped structural systems with no spill-over 无外溢无阻尼结构体系的对称带结构保留有限元模型更新问题

IF 5.7 1区工程技术

International Journal of Engineering Science Pub Date : 2025-09-22 DOI: 10.1016/j.ijengsci.2025.104389

Xianlu Liao , Yongxin Yuan

引用次数: 0

Global limit points behaviour and multistable thresholds in electrostatically actuated double micro-beam structures 静电驱动双微梁结构的全局极限点行为和多稳定阈值

IF 5.7 1区工程技术

International Journal of Engineering Science Pub Date : 2025-09-21 DOI: 10.1016/j.ijengsci.2025.104387

Arava R. Korakh, Lior Medina

{"title":"Global limit points behaviour and multistable thresholds in electrostatically actuated double micro-beam structures","authors":"Arava R. Korakh, Lior Medina","doi":"10.1016/j.ijengsci.2025.104387","DOIUrl":"10.1016/j.ijengsci.2025.104387","url":null,"abstract":"<div><div>The study presents a rigorous global stability analysis of a weakly coupled and electrostatically actuated double micro-beam structure. The analysis is conducted using a reduced-order (RO) model, from which an eigenvalue analysis is carried, to determine stable and unstable points along a given equilibrium curve, thus providing stable and unstable branches, that are differentiated by limit points. Under such an analysis, it is found that unlike classical structures, limit points will not necesserally coincide with extremum points in a given curve. In the current study, the analysis is extended to a range of parameters to create a global stability analysis, prompting global limit points maps, used to determine their evolution, as well as determine various stability thrsholds. The study is carried out in two stages. First, it is studied when the structure is mechanically loaded, solidifying the analysis paradigm while also serving as a preliminary validation tool, where a finite element (FE) model serves as the reference. The analysis then moves to study the effect of electrostatic load, where direct solutions of finite differences (FD) were used as the reference, after establishing their merit at the previous stage. It is shown that while a double micro-beam can become bistable when mechanically loaded, it will transform under electrostatic load to include hitherto unknown complex limit point maps, prompting tri-, quad- and quintstability, alongside new dynamic configurations, as well as unorthodox branch formations. It is shown that the model can project stability shifts of the structure and be used as a design tool for compact tristable actuators.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"217 ","pages":"Article 104387"},"PeriodicalIF":5.7,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145095235","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}

引用次数: 0

Hadamard compatibility conditions for Rivlin–Ericksen tensors on weak singular surfaces 弱奇异曲面上Rivlin-Ericksen张量的Hadamard相容条件

IF 5.7 1区工程技术

International Journal of Engineering Science Pub Date : 2025-09-19 DOI: 10.1016/j.ijengsci.2025.104382

Markus Kaczvinszki, Wei Wu

引用次数: 0

Physics augmented machine learning discovery of composition-dependent constitutive laws for 3D printed digital materials 物理增强机器学习发现3D打印数字材料的成分依赖本构定律

IF 5.7 1区工程技术

International Journal of Engineering Science Pub Date : 2025-09-19 DOI: 10.1016/j.ijengsci.2025.104381

Steven Yang , Michal Levin , Govinda Anantha Padmanabha , Miriam Borshevsky , Ohad Cohen , D. Thomas Seidl , Reese E. Jones , Nikolaos Bouklas , Noy Cohen

{"title":"Physics augmented machine learning discovery of composition-dependent constitutive laws for 3D printed digital materials","authors":"Steven Yang , Michal Levin , Govinda Anantha Padmanabha , Miriam Borshevsky , Ohad Cohen , D. Thomas Seidl , Reese E. Jones , Nikolaos Bouklas , Noy Cohen","doi":"10.1016/j.ijengsci.2025.104381","DOIUrl":"10.1016/j.ijengsci.2025.104381","url":null,"abstract":"<div><div>Multi-material 3D printing, particularly through polymer jetting, enables the fabrication of digital materials by mixing distinct photopolymers at the micron scale within a single build to create a composite with tunable mechanical properties. This work presents an integrated experimental and computational investigation into the composition-dependent mechanical behavior of 3D printed digital materials. We experimentally characterize five formulations, combining soft and rigid UV-cured polymers under uniaxial tension and torsion across three strain and twist rates. The results reveal nonlinear and rate-dependent responses that strongly depend on composition. To model this behavior, we develop a physics-augmented neural network (PANN) that combines a partially input convex neural network (pICNN) for learning the composition-dependent hyperelastic strain energy function with a quasi-linear viscoelastic (QLV) formulation for time-dependent response. The pICNN ensures convexity with respect to strain invariants while allowing non-convex dependence on composition. To enhance interpretability, we apply <span><math><msub><mrow><mi>L</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span> sparsification. For the time-dependent response, we introduce a multilayer perceptron (MLP) to predict viscoelastic relaxation parameters from composition. The proposed model accurately captures the nonlinear, rate-dependent behavior of 3D printed digital materials in both uniaxial tension and torsion, achieving high predictive accuracy for interpolated material compositions. This approach provides a scalable framework for automated, composition-aware constitutive model discovery for multi-material 3D printing.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"217 ","pages":"Article 104381"},"PeriodicalIF":5.7,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145095240","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}

引用次数: 0

Predictive asymptotic models of damage evolution in thin adhesives with tension–compression asymmetry 具有拉压不对称的薄胶粘剂损伤演化的预测渐近模型

IF 5.7 1区工程技术

International Journal of Engineering Science Pub Date : 2025-09-18 DOI: 10.1016/j.ijengsci.2025.104384

Michele Serpilli , Raffaella Rizzoni , Frédéric Lebon

{"title":"Predictive asymptotic models of damage evolution in thin adhesives with tension–compression asymmetry","authors":"Michele Serpilli , Raffaella Rizzoni , Frédéric Lebon","doi":"10.1016/j.ijengsci.2025.104384","DOIUrl":"10.1016/j.ijengsci.2025.104384","url":null,"abstract":"<div><div>In structural engineering, accurate modeling of material damage is crucial, particularly the tension–compression asymmetry observed in quasi-brittle materials and adhesive joints. While cohesive interface models are commonly employed in the analysis of bonded structures, the parameters of these models frequently lack a direct correlation with the physical properties of the adhesive layer. To address this issue and capture the tension–compression asymmetry, this study uses asymptotic analysis to derive two new interface damage models (termed F1d and F2d) from a thin damaging interphase. The proposed models are formulated within a thermodynamically consistent framework. The F1d model uses a single damage variable with an asymmetric evolution law, whereas the more advanced F2d model uses separate variables for tensile and compressive damage, enabling independent evolution kinetics. To bridge the gap between scales and link macroscopic damage to micro-defect evolution, the new models are coupled with two micromechanical schemes: the non-interacting Kachanov–Sevostianov model and the Mori–Tanaka–Benveniste model, the latter of which accounts for defect interactions. The theoretical formulations of the models are presented, and their predictive capabilities are demonstrated through numerical simulations of a bonded joint under axial loading.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"217 ","pages":"Article 104384"},"PeriodicalIF":5.7,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145095238","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}

引用次数: 0

Experimental validation of Lamb wave dispersion curves using the Scaled Boundary Finite Element Method (SBFEM) 尺度边界有限元法（SBFEM）对Lamb波色散曲线的实验验证

IF 5.7 1区工程技术

International Journal of Engineering Science Pub Date : 2025-09-16 DOI: 10.1016/j.ijengsci.2025.104370

Carlos A. Galán Pinilla , Jorge Gosálbez , Darío Yesid Peña Ballesteros , Adan Y. León , Jabid Eduardo Quiroga

{"title":"Experimental validation of Lamb wave dispersion curves using the Scaled Boundary Finite Element Method (SBFEM)","authors":"Carlos A. Galán Pinilla , Jorge Gosálbez , Darío Yesid Peña Ballesteros , Adan Y. León , Jabid Eduardo Quiroga","doi":"10.1016/j.ijengsci.2025.104370","DOIUrl":"10.1016/j.ijengsci.2025.104370","url":null,"abstract":"<div><div>Dispersion curves are essential for characterizing Lamb wave propagation. A key challenge in estimating these curves is ensuring both computational efficiency and agreement with experimental results, particularly in complex, multilayered materials. This study focuses on bilayer structures, specifically metallic substrates with viscoelastic coatings, and employs the Scaled Boundary Finite Element Method (SBFEM) to generate dispersion curves. SBFEM discretizes the waveguide cross-section using high-order spectral finite elements and a Gauss–Lobatto–Legendre (GLL) node distribution, assigning a single spectral element per material layer. To validate the SBFEM curves, estimation is compared with experimental data obtained from metallic plates and bilayer structures consisting of viscoelastic coatings on steel substrates. The strong correlation between numerical predictions and experimental results highlights the effectiveness of SBFEM in accurately capturing Lamb wave behavior in bilayer waveguides with viscoelastic coatings while maintaining computational efficiency. These findings reinforce the method’s applicability for the analysis of wave propagation in complex, layered, and dissipative materials.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"217 ","pages":"Article 104370"},"PeriodicalIF":5.7,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145095237","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}

引用次数: 0

Multi-scale non-affine mechanics of electro-magneto-active elastomers: Taut domain exploitable convolution of polymer chain crosslinks, entanglements and finite extensibility 电磁活性弹性体的多尺度非仿射力学：聚合物链交联、缠结和有限可扩展性的紧域可开发卷积

IF 5.7 1区工程技术

International Journal of Engineering Science Pub Date : 2025-09-16 DOI: 10.1016/j.ijengsci.2025.104378

Aman Khurana , Susmita Naskar , M.M. Joglekar , Tanmoy Mukhopadhyay

{"title":"Multi-scale non-affine mechanics of electro-magneto-active elastomers: Taut domain exploitable convolution of polymer chain crosslinks, entanglements and finite extensibility","authors":"Aman Khurana , Susmita Naskar , M.M. Joglekar , Tanmoy Mukhopadhyay","doi":"10.1016/j.ijengsci.2025.104378","DOIUrl":"10.1016/j.ijengsci.2025.104378","url":null,"abstract":"<div><div>Actuation devices fabricated using smart polymers often exhibit wrinkling and pull-in instability when they are subjected to external stimulation. These instabilities can disrupt the intended functionality of the actuation devices and hinder their reliability. The underlying reason for these instabilities is the complicated architecture of the polymer network, which results in a complex and chaotic arrangement of crosslinks and entanglements in smart elastomer membranes. This convoluted structure significantly influences the mechanical behavior of the polymers when external forces are applied. To better understand and characterize these instability phenomena, the present study develops a physics-based non-affine material model incorporating the effects of critical factors like polymer chain crosslinks, entanglements, and finite extensibility. By considering the intricate interplay among these factors, the model provides fundamental insights into the mechanisms behind the instability phenomena in smart polymers. Subsequently, the study explores the relationship between the applied electromagnetic field and the taut domains. The findings reveal that the size of the taut domains can be effectively altered by manipulating the levels of polymer chain crosslinks, entanglements, and finite extensibility. It is observed that, for a given level of applied electromagnetic field, increasing the entanglement and crosslink parameter leads to a larger taut domain. Conversely, an increase in the finite extensibility of the polymer chain diminishes the taut domain under the same level of electromagnetic loading. These understandings open up new avenues for optimizing actuation devices by adjusting the intricate properties of polymer chains to enhance stability and performance by unlocking the full multi-physical potential of smart elastomers.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"217 ","pages":"Article 104378"},"PeriodicalIF":5.7,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145095236","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}

引用次数: 0

Elastohydrodynamic instabilities in pressure-driven flow through a poroelastic channel 孔隙弹性通道中压力驱动流体的弹性水动力不稳定性

IF 5.7 1区工程技术

International Journal of Engineering Science Pub Date : 2025-09-15 DOI: 10.1016/j.ijengsci.2025.104379

Ramkarn Patne

{"title":"Elastohydrodynamic instabilities in pressure-driven flow through a poroelastic channel","authors":"Ramkarn Patne","doi":"10.1016/j.ijengsci.2025.104379","DOIUrl":"10.1016/j.ijengsci.2025.104379","url":null,"abstract":"<div><div>The linear stability analysis of a pressure-driven flow through a saturated poroelastic channel sandwiched between two impermeable rigid walls is carried out in the present study. Mixture theory is employed to describe the dynamics of the interstitial fluid and elastic solid matrix. The resulting eigenvalue problem is solved using the pseudo-spectral method. Without the poroelastic solid matrix, the flow under consideration reduces to the classical plane Poiseuille flow for which the linear stability analysis predicts critical Reynolds number, <span><math><mrow><mi>R</mi><msub><mrow><mi>e</mi></mrow><mrow><mi>c</mi></mrow></msub><mo>=</mo><mn>5772</mn></mrow></math></span>. However, the present study, predicts that <span><math><mrow><mi>R</mi><msub><mrow><mi>e</mi></mrow><mrow><mi>c</mi></mrow></msub></mrow></math></span> could be as low as 5 for the flow under consideration owing to the deformability of the solid matrix. Further analysis reveals the existence of three new modes of instability. For low <span><math><mrow><mi>R</mi><mi>e</mi></mrow></math></span>, mode I dominates the instability, while at high <span><math><mrow><mi>R</mi><mi>e</mi></mrow></math></span>, mode III dominates the instability with characteristic scaling <span><math><mrow><msub><mrow><mi>Γ</mi></mrow><mrow><mi>c</mi></mrow></msub><mo>∼</mo><mn>1</mn><mo>/</mo><mi>R</mi><mi>e</mi></mrow></math></span> where <span><math><msub><mrow><mi>Γ</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> is a measure of the deformability of the solid matrix. The driving mechanism of the predicted instability is found to be the coupling between the fluid and solid due to the pressure perturbation. The energy exchange between the base state velocity gradient and normal velocity perturbation via the convection term in the linearised Navier–Stokes equation plays a supporting role to the pressure perturbations in introducing unstable modes.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"217 ","pages":"Article 104379"},"PeriodicalIF":5.7,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145060540","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}

引用次数: 0