Document Type

Article

Publication Date

11-1-2022

Abstract

As the application of composite materials in structural parts continues to increase, so does the importance to monitor the structure's health condition during their entire service life. This paper presents a comprehensive review on damage monitoring methods focusing on fiber-reinforced polymer joints: adhesively bonded, mechanically fastened, and welded. In this review, structural health monitoring (SHM) methods are classified into two major groups: intrinsic sensing (embedded at the bond line) and extrinsic sensing (placed outside the interface). Main intrinsic techniques include fiber optic sensors, piezoelectric sensors (e.g., electromechanical impedance), and nanocomposite-based monitoring. The latter has attracted significant interest in the past years and is emphasized from its applications for different joining methods. For extrinsic sensing, several non-destructive testing techniques are considered to evaluate the integrity of composite joints, including acoustic emission, acousto-ultrasonic wave (e.g., guided wave), structural vibrations and acoustics, laser shock adhesion test, electromechanical impedance (e.g., piezoelectric sensors), and ultrasonic non-destructive testing (NDT). For each sensing method, damage monitoring is discussed from three aspects: i) damage type, ii) damage location, and iii) damage severity. Novel methods, significant results, current trends, and challenges are summarized. Finally, further research efforts needed in this field are recommended.

Publication Source (Journal or Book title)

Composite Structures

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