Flexoelectricity at fractal rough surfaces
文献类型：期刊论文
| 作者 | Zhai, Chongpu; Zhang, Shuwen; Ji, Hui; Wei, Deheng; Song HX(宋恒旭); Liu, Kaiyuan3,4; Xu, Minglong |
| 刊名 | EXTREME MECHANICS LETTERS
 |
| 出版日期 | 2023-06 |
| 卷号 | 61页码:101997 |
| 关键词 | Flexoelectricity Surface roughness Contact stiffness Electro mechanical behavior |
| ISSN号 | 2352-4316 |
| DOI | 10.1016/j.eml.2023.101997 |
| 英文摘要 | This study quantifies the role of surface roughness on interfacial flexoelectricity under normal compression and oscillation by examining a series of 3D printed surfaces with diverse roughness features. For incipient contact, the measured flexoelectric charge is found to follow a power law dependence on normal compression load, with the exponent positively correlated with the fractal dimension. The value of this power law exponent is similar to that for contact stiffness. The underlying mechanism for this coincidence is elucidated by contact analyses based on geometric truncations of surface structures. Contact micromechanics show that the interfacial flexoelectric charge will increasingly concentrate on large microcontacts as the compression continues. A rougher surface with higher fractal dimension tends to demonstrate less heterogeneity for flexoelectric polarizations over microcontacts. This study provides systematic experimental measurements and comprehensive explanations for interfacial flexoelectricity and establishes quantitative links to multi scale surface structures, shedding light on novel approaches for contact evaluation and flexoelectricity enhancement. (c) 2023 Elsevier Ltd. All rights reserved. |
| 分类号 | 二类/Q1 |
| WOS研究方向 | Engineering, Mechanical ; Materials Science, Multidisciplinary ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:000955046400001 |
| 资助机构 | Xi?an Jiaotong University, China [LX6J018, XZY012021003] ; [12202342] |
| 其他责任者 | Liu, KY ; Xu, ML (corresponding author), Xi An Jiao Tong Univ, Sch Aerosp Engn, State Key Lab Strength & Vibrat Mech Struct, Xian 710049, Peoples R China. |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/91880]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.Xi An Jiao Tong Univ, Sch Aerosp Engn, State Key Lab Strength & Vibrat Mech Struct, Xian 710049, Peoples R China 2.Xi An Jiao Tong Univ, Sch Aerosp Engn, Shaanxi Key Lab Vibrat & Control Aerosp Struct, Xian 710049, Peoples R China 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 5.Rhein Westfal TH Aachen, Inst Geomech & Underground Technol, Mies van der Rohe Str 1, D 52074 Aachen, Germany |
| 推荐引用方式 GB/T 7714 | Zhai, Chongpu,Zhang, Shuwen,Ji, Hui,et al. Flexoelectricity at fractal rough surfaces[J]. EXTREME MECHANICS LETTERS,2023,61:101997. |
| APA | Zhai, Chongpu.,Zhang, Shuwen.,Ji, Hui.,Wei, Deheng.,宋恒旭.,...&Xu, Minglong.(2023).Flexoelectricity at fractal rough surfaces.EXTREME MECHANICS LETTERS,61,101997. |
| MLA | Zhai, Chongpu,et al."Flexoelectricity at fractal rough surfaces".EXTREME MECHANICS LETTERS 61(2023):101997. |
入库方式： OAI收割
来源：力学研究所
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