Abstract

A finite element model for multi-functional structures containing surface-bonded piezoelectric patches is proposed with two main objectives: to reduce the computational cost of detailed and accurate analyses; and to fully account for the adhesive layer between structure and patches, including non-uniform thickness. The proposed model is verified and used to assess the effect of adhesive layer properties on the performance of piezoelectric sensors and actuators, based on frequency responses and effective electromechanical coupling coefficient. Results indicate that increases of bonding layer thickness and thickness non-uniformity are not always detrimental to the actuation/sensing performance and could be explored as design parameters.

摘要

提出了一种包含表面粘合压电贴片的多功能结构的有限元模型，其主要目标有两个：降低详细和准确分析的计算成本；并充分考虑结构和贴片之间的粘合层，包括不均匀的厚度。基于频率响应和有效机电耦合系数，对所提出的模型进行了验证并用于评估粘合剂层特性对压电传感器和执行器性能的影响。结果表明，粘合层厚度和厚度不均匀性的增加并不总是对驱动/传感性能有害，可以作为设计参数进行探索。