Smart Materials and Structures最新文献_第10页

A novel stick-slip piezoelectric actuator is developed based on a parallelogram flexible drive mechanism to minimize shear force 基于平行四边形柔性驱动机构开发出一种新型粘滑压电致动器，可将剪切力降至最低

IF 4.1 3区材料科学

Smart Materials and Structures Pub Date : 2024-06-10 DOI: 10.1088/1361-665x/ad5125

Tao Zhang, Rui Ma, Yang Wang, Donglong Bian, Jian Zhang, Yuhang Wang

{"title":"A novel stick-slip piezoelectric actuator is developed based on a parallelogram flexible drive mechanism to minimize shear force","authors":"Tao Zhang, Rui Ma, Yang Wang, Donglong Bian, Jian Zhang, Yuhang Wang","doi":"10.1088/1361-665x/ad5125","DOIUrl":"https://doi.org/10.1088/1361-665x/ad5125","url":null,"abstract":"A piezoelectric actuator utilizing a parallelogram flexible mechanism is proposed. This actuator harnesses the parasitic motion generated by a parallelogram driven by a piezoelectric element. It differs from existing actuation mechanisms based on a similar principle in that the piezoelectric stack is positioned on the outside of the parallelogram flexible mechanism, thus protecting it from shear forces. Finite element simulations and experiments confirm this. The analysis was conducted using theoretical analysis and finite element simulation. The optimal drive angle for the parallelogram flexible mechanism was determined through finite element simulation. Additionally, a prototype actuator and an experimental measurement system were developed to assess the operational performance of the proposed piezoelectric actuator. When the driving frequency is 475 Hz and the locking force is 5 N, the motion of the actuator achieves a maximum speed of 5.65 mm s<sup>−1</sup> and a maximum horizontal load of up to 113 g; when the input frequency is 1 Hz and the input minimum starting voltage is 8 V, the minimum displacement resolution is 30 nm. A comparative analysis of experimental results, theoretical calculations, and finite element simulation results demonstrates the feasibility of the structural design.","PeriodicalId":21656,"journal":{"name":"Smart Materials and Structures","volume":"8 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141504775","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}

引用次数: 0

Highly sensitive and easy-to-attach wearable sensor for measuring finger force based on curvature changes in an ellipse-shaped finger ring 根据椭圆形指环的曲率变化测量手指力量的高灵敏度易穿戴传感器

IF 4.1 3区材料科学

Smart Materials and Structures Pub Date : 2024-06-06 DOI: 10.1088/1361-665x/ad5127

Takashi Ozaki, Norikazu Ohta, Motohiro Fujiyoshi

引用次数: 0

Application of machine learning on the design of acoustic metamaterials and phonon crystals: a review 机器学习在声超材料和声子晶体设计中的应用：综述

IF 4.1 3区材料科学

Smart Materials and Structures Pub Date : 2024-06-06 DOI: 10.1088/1361-665x/ad51bc

Jianquan Chen, Jiahan Huang, Mingyi An, Pengfei Hu, Yiyuan Xie, Junjun Wu, Yu Chen

{"title":"Application of machine learning on the design of acoustic metamaterials and phonon crystals: a review","authors":"Jianquan Chen, Jiahan Huang, Mingyi An, Pengfei Hu, Yiyuan Xie, Junjun Wu, Yu Chen","doi":"10.1088/1361-665x/ad51bc","DOIUrl":"https://doi.org/10.1088/1361-665x/ad51bc","url":null,"abstract":"This comprehensive review explores the design and applications of machine learning (ML) techniques to acoustic metamaterials (AMs) and phononic crystals (PnCs), with a particular focus on deep learning (DL). AMs and PnCs, characterized by artificially designed microstructures and geometries, offer unique acoustic properties for precise control and manipulation of sound waves. ML, including DL, in combination with traditional artificial design have promoted the design process, enabling data-driven approaches for feature identification, design optimization, and intelligent parameter search. ML algorithms process extensive AM data to discover novel structures and properties, enhancing overall acoustic performance. This review presents an in-depth exploration of applications associated with ML techniques in AMs and PnCs, highlighting specific advantages, challenges and potential solutions of applying of using ML algorithms associated with ML techniques. By bridging acoustic engineering and ML, this review paves the way for future breakthroughs in acoustic research and engineering.","PeriodicalId":21656,"journal":{"name":"Smart Materials and Structures","volume":"74 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141513491","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}

引用次数: 0

Improving resonant ice protection systems with substrate optimization 通过优化基板改进共振冰保护系统

IF 4.1 3区材料科学

Smart Materials and Structures Pub Date : 2024-06-06 DOI: 10.1088/1361-665x/ad5126

Younes Rafik, Valerian Palanque, Marc Budinger, Valerie Pommier-Budinger, Philippe Olivier

{"title":"Improving resonant ice protection systems with substrate optimization","authors":"Younes Rafik, Valerian Palanque, Marc Budinger, Valerie Pommier-Budinger, Philippe Olivier","doi":"10.1088/1361-665x/ad5126","DOIUrl":"https://doi.org/10.1088/1361-665x/ad5126","url":null,"abstract":"Electro-mechanical de-icing systems are low-energy ice protection solutions based on ice fracture mechanisms. This article focuses on resonant electro-mechanical de-icing systems that actuate modes of flexion, which require low energy compared to extension modes. However, fracture propagation limits are encountered when using such flexural modes, preventing the ice from being completely detached from the substrate. This study demonstrates the feasibility of extending the ice detachment area by optimizing the thickness of the substrate. First, the interest and the limits of flexural resonant modes are discussed. Then the de-icing of a simple metallic beam in free conditions using a flexural mode is improved owing to the parametric optimization of the substrate thickness. The optimization is verified by tests on aluminum prototypes. The optimization results are then extended to a clamped composite plate and then to a NACA profile, showing interest in the approach to fully de-ice structures with modes of flexion, even in the case of complex geometries. With this last example, the study also demonstrates the feasibility of electro-mechanical ice protection systems for carbon fiber reinforced Polymer composite structures.","PeriodicalId":21656,"journal":{"name":"Smart Materials and Structures","volume":"30 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141513492","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}

引用次数: 0

Paediatric ankle rehabilitation system based on twisted and coiled polymer actuators 基于扭曲和盘绕聚合物致动器的小儿踝关节康复系统

IF 4.1 3区材料科学

Smart Materials and Structures Pub Date : 2024-06-06 DOI: 10.1088/1361-665x/ad50b0

Alberto Gonzalez-Vazquez, Lorenzo Garcia, Jeff Kilby

{"title":"Paediatric ankle rehabilitation system based on twisted and coiled polymer actuators","authors":"Alberto Gonzalez-Vazquez, Lorenzo Garcia, Jeff Kilby","doi":"10.1088/1361-665x/ad50b0","DOIUrl":"https://doi.org/10.1088/1361-665x/ad50b0","url":null,"abstract":"Rehabilitation is crucial for children with physical disabilities arising from various conditions. Traditional exoskeletons, reliant on electric motors and rigid components, making them cumbersome, heavy, and unsuitable for use outside clinical facilities. To overcome these, researchers are turning to soft wearable rehabilitation robots (SWRRs) with artificial muscles based on smart materials like twisted and coiled polymer actuators (TCPs). TCPs offer enhanced compliance, adaptability, comfort, safety, and reduced weight—critical for paediatric use. Despite facing challenges like low operating frequencies and high temperatures, TCPs are explored as potential artificial muscles for SWRRs, due to their advantages on the force they can generate, the strain and a linear behaviour. This study details a proof of concept for a paediatric rehabilitation system for ankles based on TCPs, including the actuator characterization, mechanical design, control strategy, and human-computer-interface (HCI). The resulting device achieved a 1.4 Nm torque, a 10° range of motion in dorsiflexion within 5 s, and integrated electromyographic HCI. This research marks a promising step towards innovative, soft wearable rehabilitation solutions for children with physical disabilities.","PeriodicalId":21656,"journal":{"name":"Smart Materials and Structures","volume":"15 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141513490","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}

引用次数: 0

Pendulum type magnetically coupled rotary piezoelectric energy harvester 摆式磁耦合旋转压电能量收集器

IF 4.1 3区材料科学

Smart Materials and Structures Pub Date : 2024-06-04 DOI: 10.1088/1361-665x/ad508f

Xuejin Liu, Yongfeng Yan, Feng Zhong, Jingwei Yang, Limin Zhang and Lipeng He

{"title":"Pendulum type magnetically coupled rotary piezoelectric energy harvester","authors":"Xuejin Liu, Yongfeng Yan, Feng Zhong, Jingwei Yang, Limin Zhang and Lipeng He","doi":"10.1088/1361-665x/ad508f","DOIUrl":"https://doi.org/10.1088/1361-665x/ad508f","url":null,"abstract":"This research proposes a rotary motion-based non-contact pendulum piezoelectric energy harvester (P-PEH). The working region of the piezoelectric vibrator can be maintained in a magnetically coupled system at all times by means of a motion conversion mechanism. The combination of the motion conversion mechanism and the magnetic coupling system not only reduces the loss of the piezoelectric material, but also improves the output performance of the piezoelectric vibrator. The paper investigates the effects of the excitation distance L, the radius of the base circle R, and the number of excitation magnets N on the output performance of the P-PEH. When the input speed of 600 rpm, L = 10 mm, R = 21 mm, and N = 1, the peak-to-peak voltage (Vpp) is 58.75 V. At this parameter, the output power of the device with an external 20 kΩ load is 0.0187 W. The viability of P-PEH was finally demonstrated through several application testing. P-PEH can easily light up 63 LEDs while its output energy can keep the temperature and humidity sensor in use. In summary, P-PEH can effectively collect external rotational energy for power storage and supply, and supply electricity to wireless sensor networks and microelectronic devices with further studies.","PeriodicalId":21656,"journal":{"name":"Smart Materials and Structures","volume":"43 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141258717","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}

引用次数: 0

Experimental and theoretical investigation on magnetorheological elastomers containing carbonyl iron particles coated with silane coupling agent 含硅烷偶联剂涂层羰基铁颗粒的磁流变弹性体的实验和理论研究

IF 4.1 3区材料科学

Smart Materials and Structures Pub Date : 2024-05-21 DOI: 10.1088/1361-665x/ad49ef

Yun Tian, Zhao-Dong Xu, Ying-Qing Guo, Li-Hua Zhu, Yao-Rong Dong, Qiang-Qiang Li, Zhong-Wei Hu and Ya-Xin Wei

{"title":"Experimental and theoretical investigation on magnetorheological elastomers containing carbonyl iron particles coated with silane coupling agent","authors":"Yun Tian, Zhao-Dong Xu, Ying-Qing Guo, Li-Hua Zhu, Yao-Rong Dong, Qiang-Qiang Li, Zhong-Wei Hu and Ya-Xin Wei","doi":"10.1088/1361-665x/ad49ef","DOIUrl":"https://doi.org/10.1088/1361-665x/ad49ef","url":null,"abstract":"Magnetorheological (MR) elastomer composites, comprising soft silicone rubber, various additives, and different weight fractions of carbonyl iron particles (CIPs) coated with silane coupling agent, are produced via a novel manufacturing process in an anisotropic state. This study encompasses both experimental and modeling investigations into the dynamic viscoelastic properties of magnetorheological elastomer (MREs) in shear mode under varying magnetic fields, displacement amplitudes, and frequencies. Two MRE vibration mitigation devices are fabricated to experimentally assess the shear storage modulus and the loss factor of MREs. The experimental findings reveal a pronounced MR effect in the MRE devices, where both the shear storage modulus and the loss factor increase with rising magnetic fields, frequencies, and particle weight fractions, yet decrease with higher displacement amplitudes. A modified fractional-derivative equivalent parametric model, grounded in a magnetic field- and frequency-dependent shear modulus model along with internal variable theory, is proposed to describe the effects of these key influencing factors on the MREs’ dynamic viscoelastic properties. Comparative analysis of experimental and numerical data demonstrates that this refined mathematical model can accurately represent the dynamic viscoelastic properties of MREs.","PeriodicalId":21656,"journal":{"name":"Smart Materials and Structures","volume":"1 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141151017","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}

引用次数: 0

Examination of factors to improve the performance of dielectric elastomer transducers and their applications 研究提高介电弹性体传感器性能的因素及其应用

IF 4.1 3区材料科学

Smart Materials and Structures Pub Date : 2024-05-14 DOI: 10.1088/1361-665x/ad4759

Seiki Chiba, Mikio Waki, Makoto Takeshita and Kazuhiro Ohyama

{"title":"Examination of factors to improve the performance of dielectric elastomer transducers and their applications","authors":"Seiki Chiba, Mikio Waki, Makoto Takeshita and Kazuhiro Ohyama","doi":"10.1088/1361-665x/ad4759","DOIUrl":"https://doi.org/10.1088/1361-665x/ad4759","url":null,"abstract":"Actuators, sensors, and generators using dielectric elastomers (DEs) are inexpensive and light, and can be easily to structured, multilayer-able, and very efficient. They are ideal for an eco-energy society. In the latest technology, an only 0.15 g DE can lift an 8 kg weight by 1 mm or more in just 88 ms. The near future, it can be applied to efficient drive systems of humanoid robots, systems that assist in driving the motors of electric vehicles, and various industrial machinery. It is highly likely that very thin and miniaturized DE sensors would also support the driving of motors. In addition, DE generators, which can be applied to various external forces, have attracted significant attention as a renewable energy source. In this paper, we discuss the R&D status of DEs using mainly commercially available elastomer materials, give examples of issues, and discuss and their potential applications, and usefulness. The excellent performance of the DEs mentioned above is largely due to their carbon-based electrodes. In this study, various carbon materials (including carbon grease, carbon black, MWCNT, and SWCNT) and their DE performances were compared.","PeriodicalId":21656,"journal":{"name":"Smart Materials and Structures","volume":"210 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140940254","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}

引用次数: 0

Effect of Ti content on abnormal grain growth of Fe–Mn–Al–Ni–Ti shape memory alloy 钛含量对 Fe-Mn-Al-Ni-Ti 形状记忆合金异常晶粒长大的影响

IF 4.1 3区材料科学

Smart Materials and Structures Pub Date : 2024-05-14 DOI: 10.1088/1361-665x/ad46a2

Qinghao Wang, Ye Cui, Xinghao Li, Pulin Wu, Haosheng Wang and Zhongwu Zhang

{"title":"Effect of Ti content on abnormal grain growth of Fe–Mn–Al–Ni–Ti shape memory alloy","authors":"Qinghao Wang, Ye Cui, Xinghao Li, Pulin Wu, Haosheng Wang and Zhongwu Zhang","doi":"10.1088/1361-665x/ad46a2","DOIUrl":"https://doi.org/10.1088/1361-665x/ad46a2","url":null,"abstract":"In this paper, the effects of Ti content on the solvus temperature of γ-phase and abnormal grain growth (AGG) in Fe43.5−xMn34Al15Ni7.5Tix (x = 0, 0.5, 1 and 1.5) shape memory alloys (SMAs) were investigated. It is found that, the increase of Ti content leads to a significant reduction of the solvus temperature of γ-phase, a significant refinement of γ-phase, and a decrease of subgrain size. After 3 times cyclic heat treatments, the average grain size of Fe42Mn34Al15Ni7.5Ti1.5 SMA reaches about 9.0 mm, which is about twice of that for Fe42.5Mn34Al15Ni7.5Ti1 SMA. This is attributed to the small subgrains can provide a higher subgrain boundary energy (ΔGs) and grain boundary (GB) migration rate. The subgrain size of Fe42Mn34Al15Ni7.5Ti1.5 SMA (9.7 μm) is significantly smaller than that of Fe42.5Mn34Al15Ni7.5Ti1 SMA (21.3 μm). Thereby, the ΔGs (15.3 × 10−2 J mol−1) and GB migration rate (11.3 × 10−6 m s−1) of Fe42Mn34Al15Ni7.5Ti1.5 SMA are significantly higher than those of Fe42.5Mn34Al15Ni7.5Ti1 SMA (7.1 × 10−2 J mol−1, 6.3 × 10−6 m s−1). In addition, when the applied strain was up to 10%, the maximum superelastic strain of Fe42Mn34Al15Ni7.5Ti1.5 and Fe42.5Mn34Al15Ni7.5Ti1 were 5.5% and 5.1%, respectively. In summary, the addition of 1.5 at.% Ti in Fe–Mn–Al–Ni–Ti SMA can promote the AGG with relatively small loss in superelasticity.","PeriodicalId":21656,"journal":{"name":"Smart Materials and Structures","volume":"65 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140940146","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}

引用次数: 0

Additive effect of poly(N-methylaniline) coated Fe3O4 composite particles on carbonyl iron based magnetorheological fluid 聚（N-甲基苯胺）包覆的 Fe3O4 复合颗粒对羰基铁基磁流变液的添加效应

IF 4.1 3区材料科学

Smart Materials and Structures Pub Date : 2024-05-14 DOI: 10.1088/1361-665x/ad46a0

Shizhao Wang, ChaeWon Park, Yong Ku Kwon, Hyoung-Joon Jin, Jin-Kyun Lee and Hyoung Jin Choi

{"title":"Additive effect of poly(N-methylaniline) coated Fe3O4 composite particles on carbonyl iron based magnetorheological fluid","authors":"Shizhao Wang, ChaeWon Park, Yong Ku Kwon, Hyoung-Joon Jin, Jin-Kyun Lee and Hyoung Jin Choi","doi":"10.1088/1361-665x/ad46a0","DOIUrl":"https://doi.org/10.1088/1361-665x/ad46a0","url":null,"abstract":"Poly(N-methylaniline) (PNMA) coated magnetite (Fe3O4) (PNMA@Fe3O4) composite particles synthesized through both chemical oxidative polymerization and chemical co-precipitation processes were used as a magnetic additive for carbonyl iron (CI)-based magnetorheological (MR) fluid. The effect of the additive’s content on the rheological characteristics of the MR fluid in the presence of an externally applied magnetic field was studied along with its effect on the sedimentation ratio compared with that of CI-based MR fluid. Shear stress curves as a function of the shear rate of the CI-based MR fluids with the additive were found to be well-fitted by the Herschel–Bulkley equation and the slope of the dynamic yield stress was determined to be 2.0. The curves also showed yield stresses higher than those of the CI-based MR fluid for different magnetic field strengths. Specifically, the CI-based MR fluid with 1.0 wt% additive showed the highest yield stress and the best solid-like properties among the tested samples. Furthermore, the sedimentation issue for the CI-based MR fluid was found to improve significantly, especially for the lowest settling rate of the MR fluid with 1.0 wt% additive. The addition of 1.0 wt% PNMA@Fe3O4 additive resulted in the CI-based MR fluid exhibiting the best properties, owing to improved rheological features and a reduced sedimentation rate.","PeriodicalId":21656,"journal":{"name":"Smart Materials and Structures","volume":"67 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140942410","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}

引用次数: 0