Piezoelectric polymer thin films with architected cuts

被引:0
作者
Lichen Fang
Jing Li
Zeyu Zhu
Santiago Orrego
Sung Hoon Kang
机构
[1] Johns Hopkins University,Department of Mechanical Engineering
[2] Johns Hopkins University,Hopkins Extreme Materials Institute
[3] Wuhan University of Technology,Hubei Key Laboratory of Advanced Technology for Automotive Components
来源
Journal of Materials Research | 2018年 / 33卷
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摘要
Introducing architected cuts is an attractive and simple approach to tune mechanical behaviors of planar materials like thin films for desirable or enhanced mechanical performance. However, little has been studied on the effects of architected cuts on functional materials like piezoelectric materials. We investigated how architected cut patterns affect mechanical and piezoelectric properties of polyvinylidene fluoride thin films by numerical, experimental, and analytical studies. Our results show that thin films with architected cuts can provide desired mechanical features like enhanced compliance, stretchability, and controllable Poisson’s ratio and resonance frequency, while maintaining piezoelectric performance under static loadings. Moreover, we could observe maximum ∼30% improvement in piezoelectric conversion efficiency under dynamic loadings and harvest energy from low frequency (<100 Hz) mechanical signals or low velocity (<5 m/s) winds, which are commonly existing in ambient environment. Using architected cuts doesn’t require changing the material or overall dimensions, making it attractive for applications in self-powered devices with design constraints.
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页码:330 / 342
页数:12
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共 189 条
[1]  
Valdevit L(2011)Protocols for the optimal design of multi-functional cellular structures: From hypersonics to micro-architected materials J. Am. Ceram. Soc. 94 1-20
[2]  
Jacobsen AJ(1987)Foam structures with a negative Poisson’s ratio Science 235 1038-1040
[3]  
Greer JR(1996)Fracture toughness of re-entrant foam materials with a negative Poisson’s ratio: Experiment and analysis Int. J. Fract. 80 73-83
[4]  
Carter WB(2000)Negative Poisson’s ratio foam as seat cushion material Cell. Polym. 19 157-167
[5]  
Lakes R(2005)Design of an artificial intervertebral disc exhibiting a negative Poisson’s ratio Cell. Polym. 24 127-138
[6]  
Choi JB(2011)Poisson’s ratio and modern materials Nat. Mater. 10 823-837
[7]  
Lakes RS(2016)Topology optimization for architected materials design Annu. Rev. Mater. Res. 46 211-233
[8]  
Lowe A(2016)Architected cellular materials Annu. Rev. Mater. Res. 46 187-210
[9]  
Lakes RS(2017)Harnessing instabilities to design tunable architected cellular materials Annu. Rev. Mater. Res. 47 51-61
[10]  
Martz EO(2017)Negative-Poisson’s-ratio materials: Auxetic solids Annu. Rev. Mater. Res. 47 63-81