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Dielectric elastomers (DEs) are the polymers capable of inducing deformation under electrical stimulation. When subject to a voltage across its thickness, the material reduces in thickness and expands in area. This paper presents a new method to analyze deformation and stress distribution response of the dielectric elastomer actuator (DEA) model under different applied voltage. An equal-biaxial pre-strained circular actuator model was built. The Yeoh strain energy potential and the collocation method are used for describing the large strain actuation response and stress distribution. The study in this paper has shown that: the stress and the stretch distributions in the passive region of the DE actuator depend on the radial distance from the center at the calculation point of the passive region and the magnitude of the applied voltage; with the same excitation applied voltage, we can get a larger deformation actuation by choosing an appropriate pre-stretch ratio; the influence of the non-ideal material has seriously affected the actual deformation of the DE actuators. This analytical model has a reference potential for the design optimization of high performance DEA systems and the model-based control of the DEA robot. 相似文献
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在2007年首三季的窝轮市场中,刷新了多项新纪录,于大市创出新高的同时.窝轮总成交亦录得历年最大,最高单日窝轮成交,达272.9亿元.单单是第三季的窝轮成交已达11,848亿元.而由2007年1-9月窝轮总成交有25,446亿元.已超过去年全年42%.至于窝轮占大市成交比例,则终止连续三季的跌势,回升至19.4%.[第一段] 相似文献
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学习和理解习近平总书记关于国企改革的一系列论述,对于正确认识当前"混合所有制经济"问题上存在的意见分歧,牢牢把握混合经济的方向,进一步巩固国企在我国社会主义政权经济基础的支柱地位,意义极其重大。 相似文献
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承担社会物流的主要集散地是港口,特别是进出口物流的主要载体。传统港口物流实现的是“港到港”,现代物流要求的是“门到门”服务。这就要求构筑港口物流业发展配套的现代综合运输网络与腹地市场体系,进一步拓展港口物流业务。门到门服务中最具经济效率的就是,为客户提供物流解决方案。 相似文献
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