MEASUREMENT OF ACOUSTIC VELOCITY AND ATTENUATION OF ERF
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- 英文论文题名：MEASUREMENT OF ACOUSTIC VELOCITY AND ATTENUATION OF ERF
- 论文作者：Xiao-yu WANG ; Chuan-xi QIN ; Hao WANG ; Xun GONG ; Hao-dong WU ; De ZHANG
- 英文论文作者：Xiao-yu WANG ; Chuan-xi QIN ; Hao WANG ; Xun GONG ; Hao-dong WU ; De ZHANG ; MOE Key Laboratory of Modern Acoustic ; Institute of Acoustics ; Nanjing University
- 年：2016
- 作者机构：MOE Key Laboratory of Modern Acoustic, Institute of Acoustics, Nanjing University;
- 英文论文关键词：Electrorheological fluid ; Acoustic velocity ; Acoustic attenuation ; Leaky current
- 会议召开时间：2016-10-21
- 会议录名称：2016年全国压电和声波理论及器件应用研讨会论文摘要集
- 英文会议录名称：Abstract Book of 2016 Symposium on Piezoelectricity, Acoustic Waves and Device Applications
- 语种：英文
- 分类号：TB381
- 学会代码：AGLU
- 会议名称：2016年全国压电和声波理论及器件应用研讨会
- 会议地点：中国陕西西安
- 主办单位：中国力学学会、中国声学学会、IEEE UFFC分会
- 学会名称：中国力学学会
- 页数：2
- 文件大小：90k
- 原文格式：D
- 会议级别：全国
摘要
Background, Motivation and Objective Smart materials can adaptively change or respond to an external environmental stimulus in a timely manner, producing a useful effect. Electrorheological fluids(ERF) which were introduced by Winslow in 1949, are such materials which can reversibly and continuously change from liquid-like to solid-like at the presence of an AC or DC electric field. Under the external electric field, dielectric particles are polarized and self-assembled along the direction of the external electric field between the electrodes via dipolar interactions. During the transformation process, many properties of ERF such as the acoustic velocity and the acoustic attenuation will have a drastic change. In this paper, three kinds of electrode surface morphology are chosen to analysis the longitudinal wave property of ERF systems, and also analysis the influence of leaky current to the corresponding parameters. Statement of Contribution/Methods Pitch and catch technique is adopted in this paper. The pulse signal generator is connected to a 5MHz longitudinal wave transducer, from which longitudinal wave signal is sent to ERF test box. The pulse signal is also received by a 5MHz longitudinal wave transducer. The received pulse signals are input to an oscilloscope. A high voltage supply is used to provide the DC applied electric field. A 100Ω resistor is in series in high voltage loop to detect the leaky current. The ERF is made by Titanium Dioxide and Polydimethylsiloxane with 50% of the volume fraction. The acoustic velocity and the acoustic attenuation could be calculated by the variations of peak to peak value and signal zero position of the received wave respectively. Results The transformation laws of the acoustic velocity and the acoustic attenuation of ERF for three kinds of electrode surface morphology at 5 MHz are obtained respectively, also the leaky current. Discussion and Conclusions By changing the surface morphology of electrode, the acoustic performance of ERF could be modulated. The acoustic performance also has a close relation with leaky current. In the point of view of acoustic absorption, it has more advantages to work under the condition of low electric field, since the acoustic attenuation varies quickly at low electric field and also with a quick reaction time.
Background, Motivation and Objective Smart materials can adaptively change or respond to an external environmental stimulus in a timely manner, producing a useful effect. Electrorheological fluids(ERF) which were introduced by Winslow in 1949, are such materials which can reversibly and continuously change from liquid-like to solid-like at the presence of an AC or DC electric field. Under the external electric field, dielectric particles are polarized and self-assembled along the direction of the external electric field between the electrodes via dipolar interactions. During the transformation process, many properties of ERF such as the acoustic velocity and the acoustic attenuation will have a drastic change. In this paper, three kinds of electrode surface morphology are chosen to analysis the longitudinal wave property of ERF systems, and also analysis the influence of leaky current to the corresponding parameters. Statement of Contribution/Methods Pitch and catch technique is adopted in this paper. The pulse signal generator is connected to a 5MHz longitudinal wave transducer, from which longitudinal wave signal is sent to ERF test box. The pulse signal is also received by a 5MHz longitudinal wave transducer. The received pulse signals are input to an oscilloscope. A high voltage supply is used to provide the DC applied electric field. A 100Ω resistor is in series in high voltage loop to detect the leaky current. The ERF is made by Titanium Dioxide and Polydimethylsiloxane with 50% of the volume fraction. The acoustic velocity and the acoustic attenuation could be calculated by the variations of peak to peak value and signal zero position of the received wave respectively. Results The transformation laws of the acoustic velocity and the acoustic attenuation of ERF for three kinds of electrode surface morphology at 5 MHz are obtained respectively, also the leaky current. Discussion and Conclusions By changing the surface morphology of electrode, the acoustic performance of ERF could be modulated. The acoustic performance also has a close relation with leaky current. In the point of view of acoustic absorption, it has more advantages to work under the condition of low electric field, since the acoustic attenuation varies quickly at low electric field and also with a quick reaction time.
Background, Motivation and Objective Smart materials can adaptively change or respond to an external environmental stimulus in a timely manner, producing a useful effect. Electrorheological fluids(ERF) which were introduced by Winslow in 1949, are such materials which can reversibly and continuously change from liquid-like to solid-like at the presence of an AC or DC electric field. Under the external electric field, dielectric particles are polarized and self-assembled along the direction of the external electric field between the electrodes via dipolar interactions. During the transformation process, many properties of ERF such as the acoustic velocity and the acoustic attenuation will have a drastic change. In this paper, three kinds of electrode surface morphology are chosen to analysis the longitudinal wave property of ERF systems, and also analysis the influence of leaky current to the corresponding parameters. Statement of Contribution/Methods Pitch and catch technique is adopted in this paper. The pulse signal generator is connected to a 5MHz longitudinal wave transducer, from which longitudinal wave signal is sent to ERF test box. The pulse signal is also received by a 5MHz longitudinal wave transducer. The received pulse signals are input to an oscilloscope. A high voltage supply is used to provide the DC applied electric field. A 100Ω resistor is in series in high voltage loop to detect the leaky current. The ERF is made by Titanium Dioxide and Polydimethylsiloxane with 50% of the volume fraction. The acoustic velocity and the acoustic attenuation could be calculated by the variations of peak to peak value and signal zero position of the received wave respectively. Results The transformation laws of the acoustic velocity and the acoustic attenuation of ERF for three kinds of electrode surface morphology at 5 MHz are obtained respectively, also the leaky current. Discussion and Conclusions By changing the surface morphology of electrode, the acoustic performance of ERF could be modulated. The acoustic performance also has a close relation with leaky current. In the point of view of acoustic absorption, it has more advantages to work under the condition of low electric field, since the acoustic attenuation varies quickly at low electric field and also with a quick reaction time.
引文