Smart Materials and Structures最新文献_第4页

Spring-reinforced pneumatic actuator and soft robotic applications 弹簧加固气动执行器和软机器人应用

IF 4.1 3区材料科学

Smart Materials and Structures Pub Date : 2024-09-09 DOI: 10.1088/1361-665x/ad74bf

Boyu Zhang, Xiangming Gu, Jiayuan Liu, Jingyi Kang, Chengquan Hu and Hongen Liao

引用次数: 0

Performance evaluation of a novel semi-active absorption and isolation co-control strategy with magnetorheological seat suspension for commercial vehicle 新型半主动吸收和隔离协同控制策略与商用车磁流变座椅悬架的性能评估

IF 4.1 3区材料科学

Smart Materials and Structures Pub Date : 2024-09-09 DOI: 10.1088/1361-665x/ad7080

Pingyang Li, Xiaomin Dong, Jinchao Ran, Zhenyang Fei, Lifan Wu, Di Xu

{"title":"Performance evaluation of a novel semi-active absorption and isolation co-control strategy with magnetorheological seat suspension for commercial vehicle","authors":"Pingyang Li, Xiaomin Dong, Jinchao Ran, Zhenyang Fei, Lifan Wu, Di Xu","doi":"10.1088/1361-665x/ad7080","DOIUrl":"https://doi.org/10.1088/1361-665x/ad7080","url":null,"abstract":"Vibration isolation performance of seat suspension plays a critical role in protection of drive’s physical health as the last barrier. In this paper, the integrated magnetorheological (MR) dynamic tuned mass damper (TMD) is firstly designed and utilized into seat suspension. A semi-active co-control algorithm with MR damper and MR TMD is designed, analyzed and validated by comparative experiments. The dynamic models of two MR devices have been tested and fitted. Comparing with simulation and experimental results under various excitations and control conditions, this co-control algorithm with MR TMD is validated to be highly effective. The transmissibility at resonance frequency reaches to 0.81 which is less than 1. This phenomenon has hardly been investigated in seat suspension. It illustrates that resonance has been suppressed and improved significantly. The peak acceleration decreases to 1.19 m s−2 with a reduction of 57.2%, in contrast to passive condition with MR damper. The comfort index is increased by 45.6% under random excitation than passive condition. According to these comparisons, the vibration isolation property and comfort of seat suspension can be further improved by the proposed co-control algorithm with two MR devices.","PeriodicalId":21656,"journal":{"name":"Smart Materials and Structures","volume":"6 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178652","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

Stiffness and damping tuning through using a piezoelectric friction damper and a layered structure 利用压电摩擦阻尼器和分层结构调节刚度和阻尼

IF 4.1 3区材料科学

Smart Materials and Structures Pub Date : 2024-09-09 DOI: 10.1088/1361-665x/ad72c1

Sina Rezvani, Simon S Park

{"title":"Stiffness and damping tuning through using a piezoelectric friction damper and a layered structure","authors":"Sina Rezvani, Simon S Park","doi":"10.1088/1361-665x/ad72c1","DOIUrl":"https://doi.org/10.1088/1361-665x/ad72c1","url":null,"abstract":"Vibration suppression is essential for enhancing the performance of mechanical systems, as it prevents structural damage and minimizes noise. Various methods, including passive, semi-active, and active approaches, have been developed to achieve this goal. Among these, friction dampers, primarily categorized as passive, are highly efficient in adjusting system damping and influencing energy dissipation. By modulating the normal force in the friction damper based on external force intensity, performance can be further enhanced. This study employs a piezoelectric actuator to regulate the normal force and introduces an analytical method along with finite element modeling to estimate the normal force in the friction damper. A layered structure is introduced as an additional mean to tune damping and stiffness. The performance of the semi-active piezoelectric friction damper is investigated in free and forced vibrations, including flexural and axial cyclic loads. Furthermore, the advantages of employing layered structures are investigated experimentally. Overall, the piezoelectric friction damper demonstrates effective energy dissipation during macroslip events. Nevertheless, in case of microslip, increasing the actuator voltage results in reduced damping and a marginal rise in stiffness.","PeriodicalId":21656,"journal":{"name":"Smart Materials and Structures","volume":"46 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178651","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

Model modification and influence of edge effect on effective area of giant electro-rheological polishing using plate electrodes 使用板式电极进行巨型电流变抛光的模型修改和边缘效应对有效面积的影响

IF 4.1 3区材料科学

Smart Materials and Structures Pub Date : 2024-09-06 DOI: 10.1088/1361-665x/ad74c0

Haihong Ai, Pingfa Ren, Kun Wang, Tianqi Song, Zhanshan Wang

{"title":"Model modification and influence of edge effect on effective area of giant electro-rheological polishing using plate electrodes","authors":"Haihong Ai, Pingfa Ren, Kun Wang, Tianqi Song, Zhanshan Wang","doi":"10.1088/1361-665x/ad74c0","DOIUrl":"https://doi.org/10.1088/1361-665x/ad74c0","url":null,"abstract":"Giant electro-rheological polishing (GERP) is recognized as an innovative ultra-precision machining technology with significant potential. However, the pronounced edge effect within the GERP’s polishing gap can introduce errors in calculating the effective area and designing the electrode structure. This, in turn, may lead to under-polishing and an increased risk of insulation breakdown. In this study, COMSOL was employed to investigate the electric field distribution characteristics within the polishing gap. This exploration aimed to refine the calculation model of the effective area, optimize the plate electrodes’ structure and size, and diminish the likelihood of insulation breakdown. Through systematic finite element simulations, the impact of polishing voltage, inter-electrode gap, and plate length on the edge effect was thoroughly analyzed to ascertain its influence range. The simulation findings revealed that, while maintaining a constant inter-electrode gap for the tool electrode, variations in the polishing gap, polishing voltage, and plate length within specific ranges resulted in an edge effect influence range of approximately 1 mm. Moreover, when the machining gap, polishing voltage, and plate length remained unchanged, the edge effect influence range increased proportionally with the electrode gap within a specific range, approximately equivalent to the size of the electrode gap. Experimental validation of the giant electro-rheological effect confirmed the existence and influence range of the edge effect, aligning with the finite element simulation results. Ultimately, modifications to the calculation model of the effective area were proposed, along with a solution to optimize the electrode size and structure, with the objective of reducing the probability of insulation breakdown. In practical applications, this work can provide a valuable reference for electrode structure design, insulation breakdown improvement and parameter selection.","PeriodicalId":21656,"journal":{"name":"Smart Materials and Structures","volume":"100 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223637","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

Active acoustic metamaterials with on-demand bulk modulus and full mass density tensor 具有按需体积模量和全质量密度张量的有源声超材料

IF 4.1 3区材料科学

Smart Materials and Structures Pub Date : 2024-09-06 DOI: 10.1088/1361-665x/ad7550

Dylan A Kovacevich, Bogdan-Ioan Popa

引用次数: 0

On the time-dependent sliding contact behavior of three-phase polymer matrix smart composites 论三相聚合物基智能复合材料随时间变化的滑动接触行为

IF 4.1 3区材料科学

Smart Materials and Structures Pub Date : 2024-09-05 DOI: 10.1088/1361-665x/ad742f

Chi Hu, Huoming Shen, Yuxing Wang, Guoyong Zhang, Juan Liu, Xin Zhang

{"title":"On the time-dependent sliding contact behavior of three-phase polymer matrix smart composites","authors":"Chi Hu, Huoming Shen, Yuxing Wang, Guoyong Zhang, Juan Liu, Xin Zhang","doi":"10.1088/1361-665x/ad742f","DOIUrl":"https://doi.org/10.1088/1361-665x/ad742f","url":null,"abstract":"Three-phase smart composites consisting of magnetostrictive and piezoelectric reinforcements embedded with a polymer matrix can achieve specific multifunctional properties in response to external stimuli, which are well-suited for the application of sensors, actuators, and electronic devices. The materials exhibit complex behaviors characterized by electro-magneto-viscoelasticity coupling during the contact of these smart structures. This paper proposes a novel hybrid element method for numerically analyzing the frictionless sliding contact problem stemming from the viscoelastic behavior and multiphase interactions of polymer matrix smart composites. The study aims to fully investigate the effects of material properties, sliding velocities, and action time on the contact behavior of materials via the integration of the conjugate gradient method with the discrete convolution-fast Fourier transform algorithm. The analytical viscoelastic frequency response functions are derived by substituting elastic solutions with the time-dependent relaxation modulus. Numerical results show that three-phase polymer matrix smart composites exhibit lower contact pressure and higher surface electric/magnetic potential than three-phase magneto-electro-elastic composites. Sliding velocity and action time strongly influence the distribution of pressure/stress and electric/magnetic potential.","PeriodicalId":21656,"journal":{"name":"Smart Materials and Structures","volume":"32 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178659","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

Preparation and performance study of silicon modified polyurethane-based magnetorheological elastomeric polishing pad 硅改性聚氨酯磁流变弹性抛光垫的制备与性能研究

IF 4.1 3区材料科学

Smart Materials and Structures Pub Date : 2024-09-05 DOI: 10.1088/1361-665x/ad74c2

Da Hu, Haotian Long, Jiabin Lu, Huilong Li, Jun Zeng, Qiusheng Yan

{"title":"Preparation and performance study of silicon modified polyurethane-based magnetorheological elastomeric polishing pad","authors":"Da Hu, Haotian Long, Jiabin Lu, Huilong Li, Jun Zeng, Qiusheng Yan","doi":"10.1088/1361-665x/ad74c2","DOIUrl":"https://doi.org/10.1088/1361-665x/ad74c2","url":null,"abstract":"By employing magnetorheological elastomers (MREs) as polishing pads for chemical mechanical polishing (CMP), the magnetorheological properties are utilized to effectively control the flexible removal of materials in CMP. This study presents a method for preparing a silicon modified polyurethane (SPU)-based MRE polishing pad, aimed at demonstrating improved magnetorheological properties while preserving mechanical properties. The SPU-based MRE polishing pad was synthesized through the copolymerization of hydroxypropyl silicone oil and polyurethane prepolymers, with subsequent evaluation of its mechanical properties and polishing performance. Fourier transform infrared analysis confirmed the successful incorporation of the soft polydimethylsiloxane main chain from organosilicon into the polyurethane main chain, forming a soft segment that intertwines with the polyurethane main chain to create a soft-hard segment crosslinked structure. Comparison to polyurethane (PU)-based MRE, SPU exhibits significantly reduced hardness but improved wear resistance, as well as enhanced resistance to acid and alkali corrosion. Due to the presence of a soft matrix, SPU shows better magnetorheological effects (MR Effects) than PU-based MRE. Under a magnetic field intensity of 845 mT, the MR Effect of PU-based MRE is only 18%, while Si-15.96 and Si-16.79 SPU-based MREs can reach 84% and 110%, respectively. Although the material removal rate (MRR) of single-crystal SiC decreases after polishing with SPU compared to PU-based MRE, a higher surface quality is achieved, and the glazing degree of the polishing pad is significantly reduced. In the magnetic field-assisted polishing of single crystal SiC, the MRR increased by 38.4% when polished with an SPU-based MRE polishing pad, whereas the MRR was only 8.7% when polished with a PU-based MRE polishing pad. This study provides further evidence for the development and application of MRE in CMP.","PeriodicalId":21656,"journal":{"name":"Smart Materials and Structures","volume":"14 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178660","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

A nonlinear structural pulse-like seismic response prediction method based on pulse-like identification and decomposition learning 基于类脉冲识别和分解学习的非线性结构类脉冲地震反应预测方法

IF 4.1 3区材料科学

Smart Materials and Structures Pub Date : 2024-09-05 DOI: 10.1088/1361-665x/ad742d

Bo Liu, Qiang Xu, Jianyun Chen, Yin Wang, Jiansheng Chen, Tianran Zhang

{"title":"A nonlinear structural pulse-like seismic response prediction method based on pulse-like identification and decomposition learning","authors":"Bo Liu, Qiang Xu, Jianyun Chen, Yin Wang, Jiansheng Chen, Tianran Zhang","doi":"10.1088/1361-665x/ad742d","DOIUrl":"https://doi.org/10.1088/1361-665x/ad742d","url":null,"abstract":"Accurate and fast prediction of structural response under seismic action is important for structural performance assessment, however, existing deep learning-based prediction methods do not consider the effect of pulse characteristics of near-fault pulse-like ground motions on structural response. To address the above issues, a new method based on wavelet decomposition and attention mechanism-enhanced decomposition learning, i.e. WD–AttDL, is proposed in this study to predict structural response under pulse-like ground motions. This method innovatively combines a WD-based velocity pulse-identification method with decomposition learning, where decomposed pulses and high-frequency features are used as inputs to the neural-network model, thus simplifying the identification of pulse features for the model. The decomposition learning model integrates several types of neural network components such as convolutional neural network feature extraction submodule, long short-term memory neural network temporal learning submodule and self-attention mechanism submodule. In order to verify the accuracy and validity of the proposed methodology, three sets of case studies were carried out, including elasto-plastic time-history analyses of planar reinforced concrete (RC) frame structures, a three-dimensional RC frame structure, and two types of masonry seismic isolation structures. Compared with existing structural seismic response models, WD–AttDL synergistically integrates the advantages of different modules and thus offers a higher prediction accuracy. In particular, it reduces the peak error of the predicted response, which is important for the evaluation of structural performance. In addition, WD–AttDL has a great potential for application in fast vulnerability and reliability analysis of pulse-like earthquakes in nonlinear structures.","PeriodicalId":21656,"journal":{"name":"Smart Materials and Structures","volume":"60 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178656","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

Variable damping energy regenerative damper for self-powered sensors and self-sensing devices in smart electric buses 用于智能电动公交车自供电传感器和自传感设备的可变阻尼能量再生阻尼器

IF 4.1 3区材料科学

Smart Materials and Structures Pub Date : 2024-09-05 DOI: 10.1088/1361-665x/ad72bf

Mansour Abdelrahman, Chengliang Fan, Minyi Yi, Zutao Zhang, Asif Ali, Xiaofeng Xia, A A Mohamed, Shoukat Ali Mugheri, Ammar Ahmed

{"title":"Variable damping energy regenerative damper for self-powered sensors and self-sensing devices in smart electric buses","authors":"Mansour Abdelrahman, Chengliang Fan, Minyi Yi, Zutao Zhang, Asif Ali, Xiaofeng Xia, A A Mohamed, Shoukat Ali Mugheri, Ammar Ahmed","doi":"10.1088/1361-665x/ad72bf","DOIUrl":"https://doi.org/10.1088/1361-665x/ad72bf","url":null,"abstract":"In recent years, the increasing adoption of electric buses (EBs) worldwide has contributed significantly to reducing environmental pollution. Nevertheless, the most challenging obstacle hindering the efficiency of EBs is their power supply. In this study, a multi-purpose variable damping energy regenerative damper (VD-ERD) using a double coaxial slotted link motion conversion mechanism was proposed for health monitoring of the EBs suspension system, tunning the damping during the operation on different road conditions while providing electric energy for self-powered sensors in EBs. The VD-ERD consists of two identical generators; one is connected to optimal constant resistance for maximum energy harvesting, and the other is linked to adjustable resistance for fine-tuning the damping. Consequently, both generators connect to a rectifier and storage circuits. Furthermore, VD-ERD was developed in MATLAB/Simulink to evaluate its performance in damping and energy harvesting in different road excitations. The VD-ERD achieved an 11.59 W peak and 1.84 W RMS power at 50 km h−1 on an ISO class A road and a 36.38 W peak and 6.34 W RMS power on an ISO class B road. In addition, the experimental finding indicated that controlling the external resistance is capable of tuning the damping. Simultaneously, the prototype achieved a peak power output of 10.29 W at 12 mm and 3 Hz. Furthermore, the voltage signals received from the generators were analyzed using a deep learning model to monitor the condition of the suspension system in four different modes, namely slow, medium, fast, and failure; the result shows 99.37% training accuracy. Feasibility analysis and performance testing showed that VD-ERD provides sufficient power to 10 sensors, indicating that it can power the self-powered and self-sensing devices of EBs.","PeriodicalId":21656,"journal":{"name":"Smart Materials and Structures","volume":"11 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178655","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

Origami inspired dual matrix intelligent shape memory polymer composite folds for deployable structures 受折纸启发的双基质智能形状记忆聚合物复合材料褶皱可部署结构

IF 4.1 3区材料科学

Smart Materials and Structures Pub Date : 2024-09-05 DOI: 10.1088/1361-665x/ad70e4

Aamna Hameed, Kamran A Khan

{"title":"Origami inspired dual matrix intelligent shape memory polymer composite folds for deployable structures","authors":"Aamna Hameed, Kamran A Khan","doi":"10.1088/1361-665x/ad70e4","DOIUrl":"https://doi.org/10.1088/1361-665x/ad70e4","url":null,"abstract":"It remains a challenge to develop an intelligent, programmable multifunctional material system capable of recovering shape, withstanding high loads, and detecting folding extent remotely for self-deployable structures used in aerospace, robotics, and medical devices. In this work, our objective is to develop intelligent shape memory polymer composite (iSMPC) folds embedded with reduced graphene oxide-coated self-sensing fabric. This will enable remote sensing of the fold state based on resistance changes and achieve higher strength and modulus. Firstly, we demonstrate the ability to sense the extent of folding and establish the relationship between piezoresistivity and fold state change by conducting cyclic compression analysis on folds with different gap sizes (6 mm, 9 mm, and 12 mm) at temperatures of 25 °C, 35 °C, and 45 °C. The iSMPC fold with a 6 mm gap exhibited the highest bending stiffness (650.3 N mm−1) and curvature (0.55 mm−1), resulting in a higher change in fractional change in resistance (FCR). Subsequently, the shape memory cycles of the 6 mm iSMPC fold were demonstrated through localized controlled heating. Its shape recovery process exhibited repeatable behavior with a high recovery ratio of 95%. Lastly, a two-fold iSMPC structure was developed, and its performance was analyzed during a complete shape memory cycle. The piezoresistive response during higher-temperature cyclic loading resembled that of the single fold, exhibiting an FCR range between −9% and 5%, thereby demonstrating the repeatability of the iSMPC fold response.","PeriodicalId":21656,"journal":{"name":"Smart Materials and Structures","volume":"152 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178654","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