| Flexoelectricity at fractal rough surfaces | |
| Zhai, Chongpu; Zhang, Shuwen; Ji, Hui; Wei, Deheng; Song HX(宋恒旭); Liu, Kaiyuan3,4; Xu, Minglong | |
| Source Publication | EXTREME MECHANICS LETTERS
 |
| 2023-06 | |
| Volume | 61Pages:101997 |
| ISSN | 2352-4316 |
| Abstract | 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. |
| Keyword | Flexoelectricity Surface roughness Contact stiffness Electro mechanical behavior |
| DOI | 10.1016/j.eml.2023.101997 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000955046400001 |
| WOS Research Area | Engineering, Mechanical ; Materials Science, Multidisciplinary ; Mechanics |
| WOS Subject | Engineering ; Materials Science ; Mechanics |
| Funding Organization | Xi?an Jiaotong University, China [LX6J018, XZY012021003] ; [12202342] |
| Classification | 二类/Q1 |
| Ranking | 3+ |
| Contributor | 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. |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/91880 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Xi An Jiao Tong Univ, Sch Aerosp Engn, State Key Lab Strength & Vibrat Mech Struct, Xian 710049, Peoples R China 2.Rhein Westfal TH Aachen, Inst Geomech & Underground Technol, Mies van der Rohe Str 1, D 52074 Aachen, Germany 3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 5.Xi An Jiao Tong Univ, Sch Aerosp Engn, Shaanxi Key Lab Vibrat & Control Aerosp Struct, Xian 710049, Peoples R China |
| Recommended Citation GB/T 7714 | Zhai, Chongpu,Zhang, Shuwen,Ji, Hui,et al. Flexoelectricity at fractal rough surfaces[J]. EXTREME MECHANICS LETTERS,2023,61:101997.Rp_Au: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. |
| 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. |
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| File Name/Size | DocType | Version | Access | License | ||
| Jp2023Fa088.pdf（1867KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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