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首页> 外文会议>AD-vol.69; American Society of Mechanical Engineers(ASME) International Mechanical Engineering Congress and Exposition; 20041113-19; Anaheim,CA(US) >NONLINEAR RESPONSE OF THE MACRO FIBER COMPOSITE ACTUATOR TO MONOTONICALLY INCREASING EXCITATION VOLTAGES
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NONLINEAR RESPONSE OF THE MACRO FIBER COMPOSITE ACTUATOR TO MONOTONICALLY INCREASING EXCITATION VOLTAGES

机译：宏观纤维复合致动器对单调增加激发电压的非线性响应

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摘要

This paper presents a nonlinear model which predicts the response of a piezoelectric continuum to a monotonic increase in electric field from some DC offset value under some constant mechanical load within the linear-elastic region. A general model is derived and then specialized for a piezoceramic-based material with anisotropic actuation and mechanical properties, for example, the Macro Fiber Composite (MFC) actuator. This specialized formulation includes the linear-elastic mechanical response, as well as linear and second-order piezoelectric behavior and a second-order electromechanical cross term. Thus, there are many required linear and nonlinear material parameters, namely the elastic compliances, piezoelectric strain coefficients, electrostrictive, and elastostrictive coefficients. Using previously published work dealing with the mechanical response of the MFC, this rather large set of material properties is determined experimentally in order to predict the response of the Macro Fiber Composite device to given external loading conditions.
机译：本文提出了一个非线性模型，该模型在线性弹性区域内某些恒定机械载荷下，根据一些DC偏移值，预测压电连续体对电场的单调增加的响应。得出一个通用模型，然后将其专门用于具有各向异性驱动和机械性能的基于压电陶瓷的材料，例如，宏纤维复合材料（MFC）致动器。这种专门的公式包括线性弹性机械响应，线性和二阶压电行为以及二阶机电交叉项。因此，存在许多所需的线性和非线性材料参数，即弹性柔度，压电应变系数，电致伸缩和弹性伸缩系数。使用先前发表的有关MFC的机械响应的工作，实验确定了这套相当大的材料属性，以便预测Macro Fiber Composite设备对给定外部负载条件的响应。

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