International Journal of Mechanical Sciences最新文献

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Comparative analysis of energy harvesting by magnetoelectric components in a simulated biological environment
IF 7.1 1区 工程技术 SCI
International Journal of Mechanical Sciences Pub Date : 2025-02-15 DOI: 10.1016/j.ijmecsci.2025.110042
Zhuang Ren , Changyi Liu , Minghe Li , Wenwei Ge , Liming Zhou , Hongwei Zhao , Lihua Tang , Luquan Ren
{"title":"Comparative analysis of energy harvesting by magnetoelectric components in a simulated biological environment","authors":"Zhuang Ren ,&nbsp;Changyi Liu ,&nbsp;Minghe Li ,&nbsp;Wenwei Ge ,&nbsp;Liming Zhou ,&nbsp;Hongwei Zhao ,&nbsp;Lihua Tang ,&nbsp;Luquan Ren","doi":"10.1016/j.ijmecsci.2025.110042","DOIUrl":"10.1016/j.ijmecsci.2025.110042","url":null,"abstract":"<div><div>Implantable micro-electro-mechanical devices represent the most promising wearable technology for accurate and rapid monitoring of physiological parameters, as well as for delivering electrical stimulation to enhance therapeutic outcomes. However, reliance on battery power poses significant challenges, including medical risks associated with multiple surgeries for battery replacement and potential health threats from chemical leakage, which can also lead to environmental pollution. To address the demand for wireless energy supply in low-power applications, this paper proposes a wireless energy transmission technology based on the magneto-electromechanical effect (MME). By utilizing magnetostrictive and piezoelectric materials, the magnetoelectric energy harvesting component efficiently converts external magnetic field energy into electrical energy. Subsequent power management circuits enable the effective powering of MEMS devices. An experimental test system for the magnetoelectric energy harvesting component was developed. Comparative studies revealed that applying a magnetic field along the length of the components, using high-performance PMN-PT piezoelectric materials, and employing rigid packaging methods achieve the most efficient magnetic field-vibration dual-mode energy harvesting. A self-fixed high-performance magnetoelectric energy harvesting structure was then proposed, and its magnetoelectric energy conversion efficiency and power density were evaluated under simulated implantation conditions through simulation and experimentation. The results demonstrated that, under an excitation of 5 Oe AC magnetic field, a maximum power density of 345.1 μW/cm³ could be achieved with an external resistance of 200 kΩ. By leveraging the electric energy generated by the device in conjunction with a fundamental power management circuit, this research scheme successfully illuminates an Led lamps and provides power to a low-power thermometer. A key highlight of this study is the comparative analysis of various factors influencing the performance of magnetoelectric energy harvesting components. Additionally, a reliable packaging scheme and structure for use as an implantable device has been proposed, which establishes a solid foundation for future optimization of device performance.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"288 ","pages":"Article 110042"},"PeriodicalIF":7.1,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403434","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
Negative-stiffness Inerter-based Outrigger-Cable-Lever-Dampers for towers
IF 7.1 1区 工程技术 SCI
International Journal of Mechanical Sciences Pub Date : 2025-02-15 DOI: 10.1016/j.ijmecsci.2025.110049
Ning Su , Jing Bian , Zhihe Zhang , Cong Zeng , Zhaoqing Chen , Yi Xia
{"title":"Negative-stiffness Inerter-based Outrigger-Cable-Lever-Dampers for towers","authors":"Ning Su ,&nbsp;Jing Bian ,&nbsp;Zhihe Zhang ,&nbsp;Cong Zeng ,&nbsp;Zhaoqing Chen ,&nbsp;Yi Xia","doi":"10.1016/j.ijmecsci.2025.110049","DOIUrl":"10.1016/j.ijmecsci.2025.110049","url":null,"abstract":"<div><div>To mitigate hazardous vibrations on slender tower structures, a Negative-stiffness Inerter-based Outrigger-Cable-Lever-Damping (NIOCLD) system is proposed. The NIOCLD is composed of an outrigger, a lever, a pair of cables and negative-stiffness inerter-based (NI) dampers. The vibration-induced bending rotation of the primary tower is firstly converted into vertical direction by the outrigger. Transmitted by the cables, amplified by the lever, and finally, the vibration is dissipated by the NI dampers. The optimal parameters of the NIOCLD system were analytically derived based on <em>H</em>-norm, damping enhancement, and pole-based optimization approaches. The parametric values, applicable scopes, dynamic and static performances of these solutions are systematically compared to provide insights for the practical design. Finally, the effectiveness was validated by a practical steel-concrete hybrid wind turbine tower against seismic and wind hazards. As the NIOCLD adopts the negative-stiffness and inerter elements, it exhibits superior energy dissipation performance compared to the Inerter-based Outrigger-Cable-Lever-Damping (IOCLD) system without negative-stiffness, and amplifying damping transfer system (ADTS) without negative-stiffness or inerter. The proposed NIOCLD can dissipate more energy proportion, produce larger damping force with less stroke. Due to the high-performance and practical feasibility, the NIOCLD is especially suitable for vibration control of slender tower structures.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"288 ","pages":"Article 110049"},"PeriodicalIF":7.1,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403544","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
Dynamic Geometric Phase Mechanism for Multi-mode Guided Wave Manipulation
IF 7.1 1区 工程技术 SCI
International Journal of Mechanical Sciences Pub Date : 2025-02-15 DOI: 10.1016/j.ijmecsci.2025.110043
Chaoyu Sun , Ailing Song , Siyuan Peng , Yanxun Xiang
{"title":"Dynamic Geometric Phase Mechanism for Multi-mode Guided Wave Manipulation","authors":"Chaoyu Sun ,&nbsp;Ailing Song ,&nbsp;Siyuan Peng ,&nbsp;Yanxun Xiang","doi":"10.1016/j.ijmecsci.2025.110043","DOIUrl":"10.1016/j.ijmecsci.2025.110043","url":null,"abstract":"<div><div>This paper proposes an efficient realization method for multi-mode guided wave manipulation based on the dynamic geometric phase mechanism. The properties of the elastic elements capable of generating mode conversion are first discussed and a geometric structure is designed according to the properties. Then the genetic algorithm and simplex method are used to optimize the geometric structure of the independent unit to achieve perfect mode conversion. The theoretical analysis has proved that dynamic phase and geometric phase mechanisms can realize the phase modulation 0-2π for any mode. The multi-mode guided wave manipulation including anomalous refraction, beam splitting, and focusing is numerically and experimentally achieved by the mode-converting meta-cell with arbitrary input and output mode waves. This work solves the multi-mode manipulation problem in the guided wave system, which may provide a new solution for precisely engineering elastic waveform manipulation.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"288 ","pages":"Article 110043"},"PeriodicalIF":7.1,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421924","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
A re-evaluation of super-high ductility mechanism in superplastic uniaxial tension
IF 7.1 1区 工程技术 SCI
International Journal of Mechanical Sciences Pub Date : 2025-02-13 DOI: 10.1016/j.ijmecsci.2025.110059
Jin-Zhao Li , Zhi-Ping Guan
{"title":"A re-evaluation of super-high ductility mechanism in superplastic uniaxial tension","authors":"Jin-Zhao Li ,&nbsp;Zhi-Ping Guan","doi":"10.1016/j.ijmecsci.2025.110059","DOIUrl":"10.1016/j.ijmecsci.2025.110059","url":null,"abstract":"<div><div>Existing mechanical theories fall short in explaining the origin of delocalization behavior and the associated fluctuation phenomena observed in superplastic quasi-stable tension, which typically results in extraordinarily high fracture elongation. This study introduces a novel phenomenological model that accounts for the stick-slip effect arising from discontinuities in grain boundary sliding (GBS) during superplastic deformation. Experimental observations from uniaxial tension tests on a Zn-5Al superplastic alloy at 230 °C validate the accuracy of the simulations, which demonstrate static-kinetic coordinated deformation during each serrated fluctuation. Additionally, the simulations indicate that the stick-slip effect triggers dynamic delocalization behavior in superplastic tension, elucidating the nucleation and growth of additional micro-necks. Although this dynamic delocalization disrupts the initially stable flow, it significantly mitigates the development of macro-necks during unstable plastic flow, potentially leading to quasi-stable tensile deformation devoid of prominent macro-necks as the stick-slip effect intensifies. Notably, this study identifies for the first time the phenomenon of stress reduction during superplastic tension with jerky flow, attributable to an oscillatory stress induced by the GBS stick-slip effect superimposed on a static stress backdrop. The combined effects of GBS-induced stick-slip behavior and high strain rate sensitivity contribute to the extraordinarily large elongations observed in superplastic tension. Overall, the phenomenological model developed in this work not only clarifies the mechanical reasons behind specific phenomena in superplastic uniaxial tension, often overlooked by conventional mechanical analyses, but also proposes a new approach to enhancing superplastic deformation.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"289 ","pages":"Article 110059"},"PeriodicalIF":7.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143429553","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
Hydraulic metamaterial with tunable dynamic response
IF 7.1 1区 工程技术 SCI
International Journal of Mechanical Sciences Pub Date : 2025-02-12 DOI: 10.1016/j.ijmecsci.2025.110058
Nan Li , Changqing Bai , Yufeng Ren , Hongyan Zhang
{"title":"Hydraulic metamaterial with tunable dynamic response","authors":"Nan Li ,&nbsp;Changqing Bai ,&nbsp;Yufeng Ren ,&nbsp;Hongyan Zhang","doi":"10.1016/j.ijmecsci.2025.110058","DOIUrl":"10.1016/j.ijmecsci.2025.110058","url":null,"abstract":"<div><div>Metamaterials with programmable dynamic responses have captured significant attention in the field of advanced engineering structures owing to their ability to adapt across a wide range of frequencies. This work presents a metamaterial with tunable bandgaps, designed to enable diverse wave modulation. The proposed metamaterial exhibits elastic wave bandgaps based on the liquid–solid coupling effect, and its dynamic behaviour can be adjusted by varying external loads. Numerical studies explore the mechanism by which configuration variations regulate the tunable bandgap of the metamaterial. The bandgap tuning performance can be optimised through the design of the liquid domain, with its dispersion relationship modifiable by filling different liquids. Additionally, we investigate the directional propagation of elastic waves within the metamaterial. A dynamic test bench, equipped with adjustable external loads, is developed to experimentally verify the metamaterial's tunable bandgap. This tunable metamaterial is expected to find wide applications in advanced fields such as marine engineering and intelligent robotics.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"289 ","pages":"Article 110058"},"PeriodicalIF":7.1,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419826","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
An origami-inspired low-frequency isolator with one/two-stage quasi-zero stiffness characteristics
IF 7.1 1区 工程技术 SCI
International Journal of Mechanical Sciences Pub Date : 2025-02-09 DOI: 10.1016/j.ijmecsci.2025.110040
Kangfan Yu, Yunwei Chen, Chuanyun Yu, Jianrun Zhang, Xi Lu
{"title":"An origami-inspired low-frequency isolator with one/two-stage quasi-zero stiffness characteristics","authors":"Kangfan Yu,&nbsp;Yunwei Chen,&nbsp;Chuanyun Yu,&nbsp;Jianrun Zhang,&nbsp;Xi Lu","doi":"10.1016/j.ijmecsci.2025.110040","DOIUrl":"10.1016/j.ijmecsci.2025.110040","url":null,"abstract":"<div><div>As an emerging technology, Kresling origami exhibits rich nonlinear mechanical and kinematic properties. However, previous studies have tended to focus on one of these properties, and few have utilized its kinematic properties to design specifical mechanical properties. Inspired by the axis-rotation coupling property of Kresling origami, a novel composite anti-vibration structure (CAS) utilizing an improved cam-roller mechanism is proposed for flexible low-frequency vibration isolation. The mountain creases are simulated by rigid rods, while the valley creases are neglected to enhance the axis-rotation coupling effect as much as possible. Unlike conventional cam-roller mechanisms, the improved cam-roller mechanism overcomes the cam size limitation on working stroke and avoids friction damping of the sliding rods. By setting different cam profiles, one/two-stage quasi-zero stiffness (QZS) characteristics with wide QZS ranges can be achieved, thus enabling passive variable loading of CAS. Considering the nonlinear inertia induced by the rotating platform, the dynamic equations of CAS are established using Lagrange principle. And the Alternating frequency–time harmonic balance method is used to solve the equations, which avoids the fitting error caused by Taylor's formula. The effects of nonlinear inertia, equilibrium position, excitation amplitude, and damping on vibration isolation performance of the CAS are analyzed. It is found that changes in excitation amplitude and equilibrium position affect both nonlinear stiffness and inertia, thus affecting vibration isolation performance. Comparative discussions demonstrate CAS has wider QZS ranges and weaker stiffness nonlinearity than typical QZS isolators, X-shaped isolators, and linear isolators, which leads to superior low-frequency vibration isolation at large excitations. Both static and dynamic experiments verify the accuracy of the theoretical analysis, confirming wide QZS range and excellent low-frequency vibration isolation performance of CAS. This work presents a simple, feasible low-frequency vibration isolation scheme that may promote practical engineering applications of origami and cam-roller structures.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"289 ","pages":"Article 110040"},"PeriodicalIF":7.1,"publicationDate":"2025-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419825","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
Turbulent melt lubrication and current-carrying dynamic characterizations of the contact interface under magneto-thermal effect
IF 7.1 1区 工程技术 SCI
International Journal of Mechanical Sciences Pub Date : 2025-02-09 DOI: 10.1016/j.ijmecsci.2025.110052
Guiwen Liao , Yu Feng , Kai Wu , Shaolei Wu , Qi Chen , Wei Wang
{"title":"Turbulent melt lubrication and current-carrying dynamic characterizations of the contact interface under magneto-thermal effect","authors":"Guiwen Liao ,&nbsp;Yu Feng ,&nbsp;Kai Wu ,&nbsp;Shaolei Wu ,&nbsp;Qi Chen ,&nbsp;Wei Wang","doi":"10.1016/j.ijmecsci.2025.110052","DOIUrl":"10.1016/j.ijmecsci.2025.110052","url":null,"abstract":"<div><div>Under high-speed and high-temperature current-carrying conditions, turbulence in the metal liquefaction layer significantly influences friction interface performance, especially in a magneto-thermal shock environment. The interplay between turbulence and interface roughness complicates the dynamic behavior of hybrid lubrication and electrical contact. To explore the underlying mechanisms, this study constructs a turbulent melt lubrication model by integrating magnetic, temperature, and tribological calculations using the finite difference method (FDM). The findings reveal that armature velocity variations notably affect interface heat distribution, causing melt waves to propagate along the contact interface. As working conditions change, the primary heat source at the interface shifts from Joule heat to a combination of viscous and Joule heat (63.81 % and 36.19 %, respectively), demonstrating the complexity of the energy conversion process. Notably, the formation of a metal liquefied layer reduces the coefficient of friction and alters the lubrication state, which is crucial for optimizing the performance of electromagnetic launching system (EMLs).</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"289 ","pages":"Article 110052"},"PeriodicalIF":7.1,"publicationDate":"2025-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419827","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
Characteristics of multiple cavitations near plate structures in underwater explosions
IF 7.1 1区 工程技术 SCI
International Journal of Mechanical Sciences Pub Date : 2025-02-08 DOI: 10.1016/j.ijmecsci.2025.110047
Yifan Zhang , Liangtao Liu , Jinxiang Wang , Kun Liu , Xiwen Chen , Niannian Liu
{"title":"Characteristics of multiple cavitations near plate structures in underwater explosions","authors":"Yifan Zhang ,&nbsp;Liangtao Liu ,&nbsp;Jinxiang Wang ,&nbsp;Kun Liu ,&nbsp;Xiwen Chen ,&nbsp;Niannian Liu","doi":"10.1016/j.ijmecsci.2025.110047","DOIUrl":"10.1016/j.ijmecsci.2025.110047","url":null,"abstract":"<div><div>Multiple cavitations generated by near-field underwater explosions can cause significant structural damage, and its generation mechanisms and evolutionary characteristics are still unclear. Therefore, the characteristics of multiple cavitations near plates in underwater explosions are investigated experimentally and numerically. Multiple cavitations near air-backed plates with varying impedances are explored experimentally through a cavitation apparatus, and the effectiveness of Arbitrary Lagrangian–Eulerian method considering multiple cavitations in underwater explosions is validated by the experimental results. Based on the numerical method, the generation processes and evolutionary characteristics of multiple cavitations near air-backed plates at different detonation distances and near water-backed plates with different impedances are analyzed, where the influences of the explosion shock wave and bubble dynamics on evolutionary characteristics of multiple cavitations are commendably elucidated. On the basis of the liquid pressure and structural velocity, the generation mechanisms of multiple cavitations near the structure have also been well revealed. The results indicate that: Ⅰ. The first cavitation is mainly caused by rarefaction wave reflections or transmissions from the structure, which collapses quickly. The second cavitation is driven by negative pressure from liquid stretching due to structural oscillations, which collapses more slowly. Ⅱ. For air-backed plates, decreasing structural impedance increases the first cavitation diameter and delays second cavitation. Smaller detonation distances result in larger diameters and longer durations for cavitations. Ⅲ. For water-backed plates, when impedance is lower than water, cavitation diameters and durations increase as impedance decreases. However, when impedance exceeds water's, cavitation generation becomes difficult. Ⅳ. The third cavitation follows similar generation and evolution patterns as the second. These findings provide theoretical and technical support for revealing the complex mechanical mechanisms in near-field underwater explosions.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"288 ","pages":"Article 110047"},"PeriodicalIF":7.1,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143387871","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
Deposition mechanism of microscopic impacting droplets on flexible porous substrates
IF 7.1 1区 工程技术 SCI
International Journal of Mechanical Sciences Pub Date : 2025-02-07 DOI: 10.1016/j.ijmecsci.2025.110050
Yankang Zhang , Zhe Li , Lin Li , Chengyan Wang , Jiafeng Wu , Yuanshen Xie , Zichao Yin , Dapeng Tan
{"title":"Deposition mechanism of microscopic impacting droplets on flexible porous substrates","authors":"Yankang Zhang ,&nbsp;Zhe Li ,&nbsp;Lin Li ,&nbsp;Chengyan Wang ,&nbsp;Jiafeng Wu ,&nbsp;Yuanshen Xie ,&nbsp;Zichao Yin ,&nbsp;Dapeng Tan","doi":"10.1016/j.ijmecsci.2025.110050","DOIUrl":"10.1016/j.ijmecsci.2025.110050","url":null,"abstract":"<div><div>Flexible and breathable porous pressure sensors are gaining attention due to their potential in wearable devices for human motion monitoring. The controllable deposition and transport of droplets on porous surfaces are critical for achieving high - conductivity printing in flexible and wearable sensors, as well as in electronic applications. Due to the intricate microstructure of porous layers, accurately dynamically tracking alterations in droplet morphology and the detailed characterization of multiphase-coupled transport present significant challenges. To address these issues, this study employs a microscopic multiphase-coupled transport dynamics model based on the volume-of-fluid smoothing correction and the Kistler dynamic contact angle model (VOFS-KCA). The aim is to investigate the evolution of droplet transport on both the external surface and internal pore spaces of porous media. Furthermore, it reveals the correlation between the structural characteristics of porous media and the mass transfer process in multiphase flow. Results show that the wettability of porous surfaces is a pivotal factor in droplet clusters' dispersion and mobility. The effect of porosity on droplet penetration is nonlinear. Appropriate porosity is conducive to droplet penetration on the porous surface, while excessive porosity leads to lateral diffusion in the cavity. A smaller fiber diameter leads to an approximately circular and uniform distribution of droplets on the porous surface and reduces permeability, which is conducive to maintaining the linewidth of the printed circuit and improving the conductivity. This study systematically explores how surface wettability, porosity, and fiber structure affect droplet dispersion and infiltration, providing new insights into the design of high-performance porous systems. This work lays the foundation for the high-precision manufacturing of flexible sensors with porous surfaces, with applications in energy storage, filtration, and biomedical systems.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"288 ","pages":"Article 110050"},"PeriodicalIF":7.1,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377448","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
Locally activated 4D printing with programmable shapes and properties
IF 7.1 1区 工程技术 SCI
International Journal of Mechanical Sciences Pub Date : 2025-02-06 DOI: 10.1016/j.ijmecsci.2025.110038
Xueli Zhou , Chubang Tian , Jifeng Zhang , Luquan Ren , Lei Ren
{"title":"Locally activated 4D printing with programmable shapes and properties","authors":"Xueli Zhou ,&nbsp;Chubang Tian ,&nbsp;Jifeng Zhang ,&nbsp;Luquan Ren ,&nbsp;Lei Ren","doi":"10.1016/j.ijmecsci.2025.110038","DOIUrl":"10.1016/j.ijmecsci.2025.110038","url":null,"abstract":"<div><div>This study innovatively proposes a locally activated magnetically responsive 4D printing strategy to solve the problem of local deformation of magnetic shape memory composites. The local activation scheme is designed to precisely regulate the thermal activation area and magnetic field parameters, and the deformation behavior of the composites can be finely controlled. In addition, the strategy is applied to the shape tuning of the dome and chiral structures, which realizes the intelligent programming of structural energy absorption properties. This study opens up new avenues for the design and fabrication of adaptive and reconfigurable active mechanical metamaterials, minimally invasive medical implantable devices, and flexible electronic devices.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"288 ","pages":"Article 110038"},"PeriodicalIF":7.1,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377449","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
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