弹性基底表面薄膜起皱的计算机模拟
本文设计了一种起皱模型用以研究起皱现象的动态过程．模拟表明整个起皱过程包括三个阶段．在孵化和起皱阶段，水平方向上软基底的应力在回缩过程中传递给硬膜．而在构象松弛平衡阶段，硬膜上的应力又缓慢地传回给软基底，整个起皱过程体系的总能量持续下降．研究发现起皱后软基底上的应力集中在上表层，尤其是在波谷处．而硬膜上的应力分布则取决于方向，在垂直方向，平衡位置的应力要大予波峰和波谷处，与此相反，在水平方向应力则更集中于波峰和波谷．我们的模型既能重现起皱现象，又能重现起皮现象，为材料应力释放导致的结构失稳机理研究提供了一个非常有利的工具．...
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| Published in | 化学物理学报 no. 3; pp. 284 - 290 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
2016
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1674-0068 2327-2244 |
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| Summary: | 本文设计了一种起皱模型用以研究起皱现象的动态过程．模拟表明整个起皱过程包括三个阶段．在孵化和起皱阶段，水平方向上软基底的应力在回缩过程中传递给硬膜．而在构象松弛平衡阶段，硬膜上的应力又缓慢地传回给软基底，整个起皱过程体系的总能量持续下降．研究发现起皱后软基底上的应力集中在上表层，尤其是在波谷处．而硬膜上的应力分布则取决于方向，在垂直方向，平衡位置的应力要大予波峰和波谷处，与此相反，在水平方向应力则更集中于波峰和波谷．我们的模型既能重现起皱现象，又能重现起皮现象，为材料应力释放导致的结构失稳机理研究提供了一个非常有利的工具． |
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| Bibliography: | 34-1295/O6 Qian-ru Lv, Hua-ping Li, Cong-hua Lu, Xue-hao Hea.（1 Department of Chemistry, School of Science, Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering （Tianjin）, Tianjin 300072, China b. School of Materials Science and Engineering, Tianjin University, Tianfin 300072, China c. Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianfin University, Tianjin 300072, China） Numerous theoretical and experimental efforts have been made to explain the dependence of the static wrink~h~g morphology on the materials＇ physical properties, whereas the dy- namic wrinkling process remains elusive. In the present work, we design a wrinkling model consisting of a soft substrate and a graphene-like rigid thin film to investigate this dynamic process. The simulation shows that the whole wrinkling process includes three stages. At the incubation and wrinkling stages, the stress along the horizon direction of the soft substrate transfers to t |
| ISSN: | 1674-0068 2327-2244 |