International Journal of Mechanics and Materials in Design最新文献

{"title":"Dynamic thermoelastic response of hollow conductive nonferromagnetic cylinder governed by Joule heating and ponderomotive forces during pulsed electromagnetic excitation","authors":"Roman Musii,&nbsp;Myroslava Klapchuk,&nbsp;Andrii Kunynets","doi":"10.1007/s10999-026-09991-5","DOIUrl":"10.1007/s10999-026-09991-5","url":null,"abstract":"<div><p>The transient thermomechanical response of a hollow electrically conductive non-ferromagnetic cylinder subjected to pulsed electromagnetic excitation is investigated. The electromagnetic action is considered through two coupled physical mechanisms associated with induced currents: Joule heat generation and ponderomotive forces. Accordingly, the dynamic stress tensor is decomposed into thermal and electromagnetic contributions, allowing the individual influence of these mechanisms on the evolution of the stress state to be quantified. The temporal variation and through-thickness distribution of the stress tensor components generated by Joule heating and ponderomotive forces are analyzed. It is demonstrated that the ponderomotive contribution governs the initial stage of electromagnetic excitation, whereas the thermal contribution associated with Joule dissipation becomes dominant at later stages due to the accumulation of temperature-induced stresses. The relative contributions of both mechanisms to the total stress state are evaluated. The intensity of the combined dynamic stresses is determined, and the operational reliability of the considered hollow cylinder under pulsed electromagnetic loading is assessed using the Huber-Mises criterion. The obtained results provide insight into the transient interaction between electromagnetic forces and thermal effects in conductive cylindrical structures and establish the conditions governing their mechanical response under pulsed electromagnetic excitation.</p></div>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":"22 4","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149339463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pneumatic modulation of stability and stiffness for a modular robotic skeleton","authors":"Kangjia Fu,&nbsp;Xuesong Wu,&nbsp;Qi Zhang,&nbsp;Sunquan Yu,&nbsp;Di Chen,&nbsp;Haopeng Liang,&nbsp;Yanjie Yang,&nbsp;Hua Li,&nbsp;Xiang Zhang","doi":"10.1007/s10999-026-09998-y","DOIUrl":"10.1007/s10999-026-09998-y","url":null,"abstract":"<div><p>A key challenge in soft robotic arm design is reconciling large deformation with sufficient load-bearing capacity. Multistable structures offer both high stiffness and substantial shape change, yet their mechanical properties are fixed after fabrication. To address this, this work proposes an origami-based pneumatic skeleton with tunability of multistability and stiffness. By integrating flexible pneumatic bellows into a multistable origami module, internal pressure can be modulated to tailor the energy landscape, thereby altering the number of stable states and continuously adjusting load-bearing capacity. A multibody dynamics model is developed, incorporating geometrically exact shell elements, revolute joint constraints, and shell-to-shell contact, complemented by an energy analysis that decomposes total potential energy into origami strain energy and airbag stored energy. Simulations show that increasing internal pressure from 1.0 to 1.6 atm eliminates the potential well of the folded configuration, enabling a controlled bistable-to-monostable transition. When integrated into a multi-module robotic arm, the pneumatic skeleton exhibits configuration-dependent stiffness: in the unfolded state, stiffness increases monotonically with pressure, yielding a 6.5-fold enhancement from 1.0 to 1.9 atm; in contrast, the folded and bent states display a counterintuitive non-monotonic trend, governed by the competition between intrinsic stability and cable-mediated stabilization. The proposed pressure-tunable multistable skeleton demonstrates feasibility for stiffness regulation in soft robotic arms, suggesting its potential for stiffness adaptation in complex and unpredictable environments.</p></div>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":"22 4","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149234755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of core topology on energy absorption and nonlinear bending of meta-sandwich circular plates with additively manufactured composite face sheets","authors":"Parsa Masdar,&nbsp;Erfan Salari,&nbsp;Seyed Ali Sadough Vanini,&nbsp;Liming Dai","doi":"10.1007/s10999-026-09997-z","DOIUrl":"10.1007/s10999-026-09997-z","url":null,"abstract":"<div><p>The integration of additive manufacturing and mechanical metamaterials offers unprecedented opportunities for designing lightweight, high-performance sandwich structures. This study investigates the nonlinear bending behavior of circular sandwich plates comprising additively manufactured Continuous Carbon Fiber-reinforced Polylactic Acid (CCF-PLA) face sheets and various core topologies, including 3D-printed cellular metamaterials (honeycomb, auxetic, and star-shaped) and Polyurethane (PU) foam. The theoretical formulation is developed based on the First-order Shear Deformation Theory (FSDT) in conjunction with von Kármán nonlinear strain–displacement relations. The governing equations are solved semi-analytically utilizing the Ritz method. Material properties for the face sheets and cellular cores are characterized through a combination of experimental tests and numerical homogenization techniques in Abaqus. A comprehensive parametric study is conducted to evaluate the influence of core topology and geometric parameters on the structural response. The results indicate that the thickness-to-length ratio (<span>(t/l)</span>) of the core cells is the most dominant factor governing the mechanical properties of the metamaterials. Crucially, pre-failure energy absorption analyses reveal a dynamic design paradigm: while thick-walled auxetic cores deliver the highest absolute energy absorption capacity for space-constrained environments, geometrically optimized honeycomb topologies achieve the highest specific energy absorption, successfully outperforming the ultra-lightweight PU foam baseline.</p></div>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":"22 4","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149234520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Internal defect monitoring system design for aluminum conductor composite cores using a magnetic-coating interlayer in power transmission lines","authors":"Young-Dae Shim,&nbsp;Changhyeon Kim,&nbsp;Jihun Kim,&nbsp;Eun-Ho Lee","doi":"10.1007/s10999-026-10002-w","DOIUrl":"10.1007/s10999-026-10002-w","url":null,"abstract":"<div><p>As power grids demand higher capacity and efficiency, aluminum conductor composite core (ACCC) cables have become increasingly important. However, the reliability of these conductors depends on the structural integrity of their internal composite cores, where hidden defects are difficult to detect due to electromagnetic shielding by surrounding aluminum conductors. This paper proposes a magnetic coating interlayer integrated into the composite core to enable electromagnetic detection of internal defects. The coating enhances the magnetic permeability of the core, improving sensitivity to defect-induced field variations measured by an external sensor. The sensor configuration was optimized through electromagnetic analysis to maximize detection capability. The magnetic coating, composed of epoxy resin and magnetic particles, was further optimized by evaluating signal-to-noise ratio (SNR) and adhesion strength. Numerical simulations, cross-cut adhesion tests, and Pareto analysis were conducted to identify the optimal balance between sensitivity and durability. Experimental validation using a coated composite core embedded in an aluminum pipe confirmed the effectiveness of the proposed method. This technique provides a practical solution for both pre-installation and in-service defect monitoring of ACCC composite cores.</p></div>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":"22 4","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149234382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Maximizing photovoltaic energy harvesting in electric vehicles: an adaptive control approach with NBO-ANFIS MPPT and DNN-based SoC estimation","authors":"Jegan Chellakannu,&nbsp;Vijay Ravindran","doi":"10.1007/s10999-026-10000-y","DOIUrl":"10.1007/s10999-026-10000-y","url":null,"abstract":"<div><p>The development of electric vehicles (EVs) has increased demand for advanced Energy Management Systems (EMS) that optimizes energy distribution, intelligently handles multiple power sources. One of the primary issues is the intermittent, unpredictable nature of renewable sources which leads to fluctuating power availability, makes real-time energy balancing difficult. Additionally, EMS must handle nonlinear system behavior, rapid load variations requiring fast, accurate control strategies. Hence, an AI-enhanced EV EMS that uses intelligent algorithms, adaptive control techniques is presented in this work. The proposed solution integrates a solar Photovoltaic (PV) array with voltage boosted using an innovative High Gain Coupled Inductor Extended Boost (HiG-CI-X Boost) Converter before being sent onto a common high-voltage bus powering the Brushless DC (BLDC) motor. In order to ensure high performance, energy flexibility, the architecture also incorporates battery, supercapacitor energy storage devices, which are interconnected via bidirectional DC-DC converters. Deep Neural Network (DNN)-based State of Charge (SoC) estimator is incorporated to predict the battery state. A three-phase Voltage Source Inverter (VSI) converts the DC bus voltage to AC in order topower BLDC motor. Accurate control over torque, speed is ensured by a feedback loop. MATLAB simulation results show that the AI-integrated EMS significantly increases energy efficiency, reduces the load on individual storage units, maximizes transient response. Moreover, the proposed converter results with 97.63% efficiency with 1.46% increase from existing topologies, with NBO-ANFIS MPPT algorithm foreshowing tracking efficiency of 99.85% with settling time at 0.14 s, respectively. The proposed MPPT achieves approximately 9–10% higher tracking efficiency reduces the settling time by nearly 78–80%.The proposed system is a viable option for intelligent, ecologically friendly electric mobility because of its exceptional scalability, robustness.</p></div>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":"22 4","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nonlinear aeroelastic analysis and mechanical design of bio-inspired flexible wings in supersonic flow via an integrated polygonal finite element approach","authors":"Zhigang Zhao,&nbsp;Loke Kok Foong,&nbsp;Jalil Jamali,&nbsp;Mustafa Bayram","doi":"10.1007/s10999-026-09994-2","DOIUrl":"10.1007/s10999-026-09994-2","url":null,"abstract":"<div><p>Bio-inspired flexible wings have potential applications in high-speed aerodynamics; however, the compliance and irregular geometry of bio-inspired flexible wings pose new challenges for aeroelasticity and mechanics-based design. In this paper, a unified polygonal finite element method (PFEM) framework for the analysis and mechanics-based design of bio-inspired flexible wings in the supersonic flow regime is proposed. A shear-locking-free polygonal Reissner–Mindlin model is formulated based on Wachspress and piecewise linear shape functions to describe complicated wing geometry efficiently. The geometric nonlinearity, continuum damage, temperature-dependent material behavior, aerothermal transients, and supersonic aerodynamic loads are taken into account in the computational formulation. Second-order piston theory is used to obtain the aerodynamic pressure, and the aerodynamic influence coefficients are calculated based on velocities and displacements of the structure. In order to validate the obtained results, the proposed PFEM framework is benchmarked against available analytical solutions, existing experimental results, and also finite element (FE) simulation conducted separately for the present problem. The results show very good correspondence, thus proving the accuracy and reliability of the proposed approach. Numerical simulations of square, dragonfly-like, and trapezoidal wings prove the ability of the framework to predict geometry-specific aeroelastic properties of such structures. Critical flutter velocities span from 295.5 m/s for the stigma-less dragonfly-like wing to 496.5 m/s for the reinforced modified trapezoidal wing. The proposed framework presents an effective numerical technique for assessing aeroelastic properties of bio-inspired flexible wings under supersonic flight conditions.</p></div>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":"22 4","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149234700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A two-parameter Mittag–Leffler fractional electron–phonon piezoelectric thermoelasticity for transient responses of multi-layer piezoelectric composites","authors":"Huili Guo,&nbsp;Yi Heng Wang,&nbsp;Fulin Shang","doi":"10.1007/s10999-026-09992-4","DOIUrl":"10.1007/s10999-026-09992-4","url":null,"abstract":"<div><p>The rapid development of ultrafast heating technology in the processing and fabrication of multi-layered piezoelectric composites has triggered numerous studies on the constitutive modeling and transient impact response of multi-physics coupling behavior for vibration control and intelligent thermal management. To accurately predict dynamic thermo-electromechanical responses in such extreme short-duration thermal conditions, this work aims to establish a novel piezoelectric thermoelasticity model by incorporating the two-parameter Mittag–Leffler fractional derivative into electron–phonon dual-phase-lag heat conduction law and strain-rate constitutive equation. The developed model is applied to investigate the transient thermal impact responses of multi-layer piezoelectric composites with non-idealized interfaces. The governing equations are solved by Laplace transformation technique associated with FFT-based numerical inversion algorithm. Dimensionless results indicate that the two-parameter Mittag–Leffler fractional derivative and material constants ratios remarkably accelerate heat propagation speed, enhance electric potential generation and mitigate excessive temperature or deformation.</p></div>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":"22 4","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149132920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"GABP-enabled multi-objective intelligent structural optimization method for soft robotic manipulator","authors":"Rui Lin,&nbsp;Shuyou He,&nbsp;Haoxuan Sun,&nbsp;Xuesong Wu,&nbsp;Kangjia Fu,&nbsp;Qi Zhang,&nbsp;Sunquan Yu,&nbsp;Ming Xu,&nbsp;Xiang Zhang","doi":"10.1007/s10999-026-09995-1","DOIUrl":"10.1007/s10999-026-09995-1","url":null,"abstract":"<div><p>Soft manipulators have gained increasing attention for their adaptability to unstructured environments, giving rise to various structural configurations. However, structural optimization typically requires case-specific parameter analysis, resulting in low optimization efficiency, while many designs still rely heavily on empirical parameter selection. This letter presents an intelligent structural optimization framework for soft manipulators. The key design parameters and performance indexes are first defined according to the considered manipulator to characterize its structural performance. A parametric finite element method (PFEM) is then used to generate performance datasets under varying parameter combinations. A genetic algorithm optimized backpropagation neural network (GABP) is subsequently trained to model the nonlinear parameter-performance relationships, forming the optimization objective function. Finally, a multi-objective particle swarm optimization (MOPSO) algorithm is applied to obtain the Pareto-optimal solutions from which optimal parameters are selected. The proposed optimization framework is validated through a case study of a cable-driven bellows soft manipulator. The GABP model accurately captures the complex mapping, achieving <span>(R^2 &gt; 0.998)</span>, and experiments further confirm the prediction accuracy with relative errors of 0.63% for stiffness <i>k</i>, 7.35% for bending stiffness <i>EI</i>, and 3.28% for natural frequency <i>f</i>. Structural optimization yields a 7.7% increase in relative compliance <i>R</i>, a 1.9% improvement in load capacity <i>P</i>, and a 34.8% increase in natural frequency <i>f</i>, demonstrating the effectiveness of the proposed optimization framework for enhancing the structural performance of the considered soft manipulator.\u0000</p></div>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":"22 4","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149132685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Jacobi–Ritz method for viscoelastic foundation effects of functionally graded triply periodic minimal surface microbeams","authors":"Ngoc-Duong Nguyen","doi":"10.1007/s10999-026-09990-6","DOIUrl":"10.1007/s10999-026-09990-6","url":null,"abstract":"<div><p>This study introduces a Jacobi–Ritz method to analyze the buckling, bending, free vibration, and damped vibration behaviors of functionally graded triply periodic minimal surface (FG-TPMS) microbeams supported by a viscoelastic foundation. The theoretical framework is based on higher-order shear deformation theory, with size-dependent effects accounted for by the modified couple stress theory. Two representative TPMS configurations—Primitive and Gyroid—alongside four distinct material gradation schemes (A1, A2, B1, and B2) are thoroughly investigated. Lagrange’s equation is used to achieve the governing equations, and the Ritz method with a Jacobi function is employed to solve the problem. The present method demonstrates significant flexibility in handling various boundary conditions, including simply-supported, clamped-free, and clamped-simply supported. The method’s accuracy and reliability are confirmed through comparisons with available results in existing literature. In addition, this research provides novel insights into the bending, buckling, and vibration characteristics of FG-TPMS microbeams resting on the viscoelastic foundation, offering valuable reference data for future studies and practical applications.</p></div>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":"22 4","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149132165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Transient response of bi-directional functionally graded nanobeams resting on a viscoelastic foundation","authors":"Faruk Firat Calim,&nbsp;Mehmet Bugra Özbey,&nbsp;Tarık Baran","doi":"10.1007/s10999-026-09996-0","DOIUrl":"10.1007/s10999-026-09996-0","url":null,"abstract":"<div><p>This study investigates the damped forced vibration response of bi-directional functionally graded (BDFG) nanobeams resting on a viscoelastic foundation, with emphasis on material gradation, nanoscale behaviour, foundation stiffness, and damping. To the best of the authors’ knowledge, this work establishes for the first time a canonical first-order ordinary differential equation formulation in the Laplace domain through conjugate momentums and their derivatives for the damped forced vibration of BDFG nanobeams resting on a viscoelastic foundation. The foundation is represented by visco-Winkler and visco-Pasternak components, allowing stiffness and damping effects to be considered simultaneously, while size dependency is incorporated through Eringen’s approach. The transfer matrix method is used to construct the element dynamic stiffness matrix, while Durbin’s technique recovers the transient response. Benchmark and convergence studies confirm the reliability of the procedure. Higher Winkler and Pasternak foundation stiffness coefficients reduce displacement amplitudes and shorten oscillation periods, while their damping components suppress the transient response and produce the strongest attenuation when acting simultaneously. Increasing the transverse gradient parameter increases displacement amplitudes and oscillation periods; however, the response is more sensitive to its initial increase, whereas further increases produce smaller changes. Increasing the axial gradient parameter reduces displacement amplitudes but generally lengthens oscillation periods. Most importantly, increasing nonlocality produces conventional stiffness-softening under simply supported conditions, whereas the opposite tendency is observed for the cantilever configuration, where displacement amplitudes decrease and oscillation periods shorten. This contrasting behaviour reveals the nonlocal stiffness-hardening paradox and demonstrates the strong dependence of the nonlocal response on boundary conditions.</p></div>","PeriodicalId":593,"journal":{"name":"International Journal of Mechanics and Materials in Design","volume":"22 4","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149132120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}