Mechanical Analysis and Experimental Studies of the Transverse Strain in Wrinkled Metallic Thin Films
The wrinkling structures, which can greatly improve the stretchability of the metallic thin films, have been widely used in the preparation of stretchable devices. However, the artificial wrinkling structures are often accompanied by the generation of microcracks, which seriously affect the performa...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-03-01
|
| Series: | Metals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4701/11/3/427 |
| _version_ | 1797413491968049152 |
|---|---|
| author | Tongxin Nie Baomin Wang Bo Liu Yali Xie Huali Yang Mingyuan Zhu Run-Wei Li |
| author_facet | Tongxin Nie Baomin Wang Bo Liu Yali Xie Huali Yang Mingyuan Zhu Run-Wei Li |
| author_sort | Tongxin Nie |
| collection | DOAJ |
| description | The wrinkling structures, which can greatly improve the stretchability of the metallic thin films, have been widely used in the preparation of stretchable devices. However, the artificial wrinkling structures are often accompanied by the generation of microcracks, which seriously affect the performance of the devices. In this work, by establishing the corresponding model, the transverse strain of the longitudinally prestrained continuous film and the strip film is mechanically analyzed, which is verified by experimental results; for the strain of blank substrate, the error of the model was about 3.7%. It is difficult to avoid the generation of microcracks with continuous films, but strip films can avoid the generation of microcracks to a certain extent. The experimental results illustrate the various factors affecting the generation of microcracks. The transverse strain of the film is proportional to the substrate’s Young’s modulus, Poisson’s ratio, thickness, and prestrain and is basically inversely proportional to the strip film’s Young’s modulus, thickness, and strip interval. Our results provide deeper knowledge for choosing proper metallic materials to fabricate stretchable wrinkled devices. |
| first_indexed | 2024-03-09T05:18:43Z |
| format | Article |
| id | doaj.art-fb8b3778ffad4592949d83b552d11cee |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T05:18:43Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-fb8b3778ffad4592949d83b552d11cee2023-12-03T12:43:27ZengMDPI AGMetals2075-47012021-03-0111342710.3390/met11030427Mechanical Analysis and Experimental Studies of the Transverse Strain in Wrinkled Metallic Thin FilmsTongxin Nie0Baomin Wang1Bo Liu2Yali Xie3Huali Yang4Mingyuan Zhu5Run-Wei Li6State Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaCAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, ChinaCAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, ChinaCAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, ChinaCAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, ChinaState Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaCAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, ChinaThe wrinkling structures, which can greatly improve the stretchability of the metallic thin films, have been widely used in the preparation of stretchable devices. However, the artificial wrinkling structures are often accompanied by the generation of microcracks, which seriously affect the performance of the devices. In this work, by establishing the corresponding model, the transverse strain of the longitudinally prestrained continuous film and the strip film is mechanically analyzed, which is verified by experimental results; for the strain of blank substrate, the error of the model was about 3.7%. It is difficult to avoid the generation of microcracks with continuous films, but strip films can avoid the generation of microcracks to a certain extent. The experimental results illustrate the various factors affecting the generation of microcracks. The transverse strain of the film is proportional to the substrate’s Young’s modulus, Poisson’s ratio, thickness, and prestrain and is basically inversely proportional to the strip film’s Young’s modulus, thickness, and strip interval. Our results provide deeper knowledge for choosing proper metallic materials to fabricate stretchable wrinkled devices.https://www.mdpi.com/2075-4701/11/3/427stretchablewrinklemicrocrackprestrain |
| spellingShingle | Tongxin Nie Baomin Wang Bo Liu Yali Xie Huali Yang Mingyuan Zhu Run-Wei Li Mechanical Analysis and Experimental Studies of the Transverse Strain in Wrinkled Metallic Thin Films Metals stretchable wrinkle microcrack prestrain |
| title | Mechanical Analysis and Experimental Studies of the Transverse Strain in Wrinkled Metallic Thin Films |
| title_full | Mechanical Analysis and Experimental Studies of the Transverse Strain in Wrinkled Metallic Thin Films |
| title_fullStr | Mechanical Analysis and Experimental Studies of the Transverse Strain in Wrinkled Metallic Thin Films |
| title_full_unstemmed | Mechanical Analysis and Experimental Studies of the Transverse Strain in Wrinkled Metallic Thin Films |
| title_short | Mechanical Analysis and Experimental Studies of the Transverse Strain in Wrinkled Metallic Thin Films |
| title_sort | mechanical analysis and experimental studies of the transverse strain in wrinkled metallic thin films |
| topic | stretchable wrinkle microcrack prestrain |
| url | https://www.mdpi.com/2075-4701/11/3/427 |
| work_keys_str_mv | AT tongxinnie mechanicalanalysisandexperimentalstudiesofthetransversestraininwrinkledmetallicthinfilms AT baominwang mechanicalanalysisandexperimentalstudiesofthetransversestraininwrinkledmetallicthinfilms AT boliu mechanicalanalysisandexperimentalstudiesofthetransversestraininwrinkledmetallicthinfilms AT yalixie mechanicalanalysisandexperimentalstudiesofthetransversestraininwrinkledmetallicthinfilms AT hualiyang mechanicalanalysisandexperimentalstudiesofthetransversestraininwrinkledmetallicthinfilms AT mingyuanzhu mechanicalanalysisandexperimentalstudiesofthetransversestraininwrinkledmetallicthinfilms AT runweili mechanicalanalysisandexperimentalstudiesofthetransversestraininwrinkledmetallicthinfilms |