The piezoelectric impedance transducer is widely used for damage detection and identification of civil/mechanical infrastructure using the electro-mechanical impedance technique, in which structural equivalent impedance is derived from the piezoelectric coupled admittance signatures of the lead zirconate titanate (PZT) patches bonded to the structure via adhesive bond. In Piezo-elastodynamic model, the bonding layer has significantly altered the overall performance of the electro-mechanical admittance signature. This paper presents the evaluation and detection of structural damage using continuous shear lag model. A three-dimensional (3D) finite element model (FE) has developed to find the effective point-driven impedance, which further integrate into continuum shear lag model to obtain the piezoelectric coupled signature. The continuum-based signatures for different damage model were compared with existing impedance-based shear lag model to highlight the efficiency and accuracy of continuum model towards damage detection process. The simulated signatures were compared with experimental signature, found satisfactory matching. From this study, it has found the continuum strain has more sensitive towards different damage levels in the host structure.

压电阻抗换能器广泛用于使用机电阻抗技术的土木/机械基础设施的损坏检测和识别，其中结构等效阻抗来自结合到传感器上的锆钛酸铅 (PZT) 贴片的压电耦合导纳特征。通过粘合剂粘合结构。在压电弹性动力学模型中，粘合层显着改变了机电导纳特征的整体性能。本文介绍了使用连续剪力滞模型评估和检测结构损伤。已开发出三维 (3D) 有限元模型 (FE) 以找到有效的点驱动阻抗，并将其进一步整合到连续剪切滞后模型中以获得压电耦合特征。将不同损伤模型的基于连续体的特征与现有的基于阻抗的剪切滞后模型进行比较，以突出连续体模型对损伤检测过程的效率和准确性。将模拟签名与实验签名进行比较，发现匹配良好。从这项研究中，发现连续应变对宿主结构中的不同损伤水平更敏感。