2024/08/30 by Hongmin Zhu, Zahra Sharif Khodaei, Ferri M.H.Aliabadi +1
Engineering · #Geophysical Methods and Applications #Non-Destructive Testing Techniques #Ultrasonics and Acoustic Wave Propagation
paper · doi:10.1016/j.ultras.2024.107445
openalex publication_date 2024/08/30 · crossref created 2024/08/30 · crossref deposited 2024/09/16 · crossref issued 2024/12/01 · crossref published 2024/12/01 · crossref published-print 2024/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/15 · crossref indexed 2026/08/01
This paper offers a comprehensive critical appraisal and experimental comparison of leading linear baseline-free techniques applied in guided wave-based structural health monitoring (GWSHM). The paper extensively examines the most popular linear baseline-free techniques, namely Time Reversal (TR), Virtual Time Reversal (VTR), Instantaneous Baseline (IB), and reciprocity-based methods. Detailed discussions on the principles, strengths, and limitations of each technique provide a thorough understanding of their capabilities and challenges. Critical factors affecting performance that influence the performance of baseline-free techniques in damage detection and localization is the main focus of the paper. These factors encompass varying environmental conditions such as temperature fluctuations, geometric and structural complexities, and diverse damage scenarios. The research reported conducts experimental comparisons among VTR, IB, and reciprocity-based techniques as related to the challenging case of composite materials, considering single and dual Barely Visible Damage (BVID) scenarios, temperature variations, boundary reflections, and structural complexities like stiffeners. The results demonstrate that the investigated baseline-free techniques are capable of identifying and localizing damages, albeit with differing capabilities.