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发布时间：2019-03-12

论文类型：期刊论文

发表时间：2018-08-01

发表刊物：SENSORS

收录刊物：SCIE、PubMed

卷号：18

期号：8

ISSN号：1424-8220

关键字：adhesive; piezoceramic; sensor; strain survivability; structural health monitoring

摘要：As one of the most common transducers used in structural health monitoring (SHM), piezoceramic sensors can play an important role in both damage detection and impact monitoring. However, the low tensile strain survivability of piezoceramics resulting from the material nature significantly limits their application on SHM in the aerospace industry. This paper proposes a novel approach to greatly improve the strain survivability of piezoceramics by optimal design of the adhesive used to bond them to the host structure. Theoretical model for determining the strain transfer coefficient through bonded adhesive from the host structure to piezoceramic is first established. Finite element analysis is then utilized to study the parameters of adhesive, including thickness and shear modulus. Experiments are finally conducted to validate the proposed method, and results show the piezoceramic sensors still work well when they are bonded on the host structures with tensile strain up to 4000 mu epsilon by using the optimal adhesive.