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A strategy for achieving improved piezoceramic transducer durability under high structural loading

机译：在高结构载荷下提高压电陶瓷换能器耐久性的策略

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摘要

This paper describes a strategy that is shown to be effective in reducing load transfer into surface-bonded piezoceramic transducer elements and could provide a practical means of improving the mechanical durability of these elements in structural health monitoring applications. The concept relies on the introduction of local out-of-plane or secondary bending in the structural host through a structural augmentation called the stand-off element (SoE). Analytical and numeric al modelling is supplemented with experimental evidence to show that large reductions in transferred load can be achieved with the insertion of a SoE, without adding significantly to the transducer profile or impairing acoustic transduction efficiency, important factors in structural health monitoring.
机译：本文介绍了一种策略，该策略在减少传递到表面键合压电陶瓷换能器元件的负载方面是有效的，并且可以提供一种在结构健康监测应用中提高这些元件的机械耐久性的实用方法。该概念依赖于通过结构扩展（称为支座元素（SoE））在结构主体中引入局部平面外或二次弯曲。分析和数值模拟均补充有实验证据，表明通过插入SoE可以大大降低传递的载荷，而又不会显着增加换能器轮廓或损害声换能效率，而这是结构健康监测的重要因素。

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