Integrally Shunted Piezoelectric Reinforcement for Tailored Frequency-Dependent Passive Damping of Composite Materials

用于定制复合材料的频率相关被动阻尼的整体分流压电增强

• 批准号: 9119582
• 负责人: George Lesieutre
• 金额: $ 2.5万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-09-15 至 1994-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9119582&HistoricalAwards=false
• 关键词: Integrally; Shunted; Piezoelectric; Reinforcement; Tailored

This research will explore an approach to the engineering of structural composite materials with enhanced intrinsic passive damping, and to develop appropriate modeling techniques and design guidelines. The approach is based on the use of integrally-shunted piezoceramic rods as reinforcing elements of a composite material. Because of high electroelastic coupling, straining produces voltage gradients along the rods. By shunting the electroded rod ends through an integral resistor, current is allowed to flow and dissipate energy through joule heating, Very high peak damping loss factors are theoretically attainable even at low fiber volume fractions (20%) in epoxy.

这项研究将探索一种方法，工程的 具有增强的本征钝化的结构复合材料 阻尼，并制定适当的建模技术， 设计指南。 该方法基于使用 整体分流的压电陶瓷杆作为 复合材料 由于高电弹性耦合， 应变产生沿着棒的电压梯度。 通过分流 电极棒末端通过一个集成电阻，电流 允许通过焦耳加热流动和耗散能量，非常 理论上可获得高峰阻尼损耗因数， 在低纤维体积分数（20%）的环氧树脂。