Thermal Shape Control of Active and Sensory Piezoelectric Composite Plates

H. Lee, D. Saravanos
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引用次数: 3

Abstract

Previously developed mechanics for piezoelectric composite materials are extended to account for thermal effects. The updated mechanics accounts for thermal effects which arise due to: (1) coefficient of thermal expansion mismatch between the various composite and piezoelectric layers, (2) pyroelectric effects on the piezoelectric plies, and (3) the temperature dependence of the composite and piezoelectric properties. The coupled mechanical, electrical, and thermal response of piezoelectric composite materials is captured at the material level. A layerwise laminate theory is formulated with the inherent capability to model both the active and sensory response of piezoelectric composite materials. Finite element equations are developed and implemented for a bilinear plate element. Numerical studies are conducted on a simply supported graphite/epoxy plate with attached piezoceramic patches to investigate thermal shape control applications and to study the resultant stress state.
主动和感应压电复合材料板的热形状控制
以前开发的压电复合材料力学扩展到考虑热效应。更新的力学考虑了由于以下原因引起的热效应:(1)各种复合材料和压电层之间的热膨胀系数不匹配,(2)压电层的热释电效应,以及(3)复合材料和压电性能的温度依赖性。压电复合材料的耦合力学、电学和热响应在材料水平上被捕获。建立了一种具有模拟压电复合材料主动响应和感觉响应的层合理论。建立并实现了双线性板单元的有限元方程。本文对带有压电陶瓷贴片的简支石墨/环氧板进行了数值研究,以研究热形状控制的应用和由此产生的应力状态。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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