| 电场下电流变液静态以及流动和剪切状态的结构 |
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| 引用本文： | 叶子申,田煜,孟永刚,温诗铸.电场下电流变液静态以及流动和剪切状态的结构[J].清华大学学报(自然科学版),2005,45(5):622-625. |
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| 作者姓名： | 叶子申 田煜 孟永刚 温诗铸 |
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| 作者单位： | 清华大学摩擦学国家重点实验室,北京,100084 |
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| 基金项目： | 国家自然科学基金资助项目(50202010) |
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| 摘 要： | 为深入了解电流变液的粘度和剪切屈服应力等宏观力学性能与其微观结构的关系,对不同高压电场作用下电流变液的成链过程,成链后的流动、屈服状态以及受剪切时链结构的变化进行了微观结构观测。结果表明:改变电场和运动状态等外部条件,电流变液的微观链结构会发生相应变化,从而影响其力学性能;电流变液的链结构主要在极板附近发生屈服和滑移;单链在剪切作用下会形成带状离散结构。
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| 关 键 词： | 电流变液 颗粒链 电场强度 屈服 |
| 文章编号： | 1000-0054(2005)05-0622-04 |
| 修稿时间： | 2004年6月3日 |
Electrorheological fluid microstructures for static fluids and flows with shearing in high voltage electric fields |
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| YE Zishen,TIAN Yu,MENG Yonggang,WEN Shizhu.Electrorheological fluid microstructures for static fluids and flows with shearing in high voltage electric fields[J].Journal of Tsinghua University(Science and Technology),2005,45(5):622-625. |
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| Authors: | YE Zishen TIAN Yu MENG Yonggang WEN Shizhu |
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| Institution: | YE Zishen,TIAN Yu,MENG Yonggang,WEN ShizhuBeijing 100084,China) |
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| Abstract: | Electrorheological fluid (ER) microstructures were observed during chain forming, flow and yield after chain forming, and structural changes during shearing with various high voltages to investigate the relationship between the ER microstructure and the ER macro-mechanical properties, such as the viscosity and the shear yield stress. The results show that the ER micro-chain structure changes with changing electric fields and motion states, which affects the mechanical properties. The results also show that the ER micro-chain structure slips and yields mainly around the plate electrode, and that single chains form discrete zonal structures during shearing. |
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| Keywords: | electrorheological fluid (ER) particle chain electric field strength yield |
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