Classification Functions and Optimization Algorithms for Debonding Detection in Adhesively Bonded Lap-joints through Ultrasonic Guided Waves

2021 ◽  
Author(s):  
Mohsen Barzegar ◽  
Dario J. Pasadas ◽  
Artur L. Ribeiro ◽  
Helena G. Ramos
Keyword(s):  
Guided Waves ◽  
Optimization Algorithms ◽  
Lap Joints ◽  
Ultrasonic Guided Waves ◽  
Adhesively Bonded ◽  
Debonding Detection

ULTRASONIC GUIDED WAVES FOR THE INSPECTION OF ADHESIVELY BONDED JOINTS

2008 ◽  
Author(s):  
Padma Kumar Puthillath ◽  
Fei Yan ◽  
Clifford J. Lissenden ◽  
Joseph L. Rose ◽  
Donald O. Thompson ◽  
...  
Keyword(s):  
Guided Waves ◽  
Ultrasonic Guided Waves ◽  
Bonded Joints ◽  
Adhesively Bonded ◽  
Adhesively Bonded Joints

Effectiveness of RAPID and SSM Algorithms on Composite Scarf Repair

2018 ◽  
Vol 774 ◽  
pp. 535-540 ◽  
Author(s):  
Florian Lambinet ◽  
Zahra Sharif Khodaei ◽  
Ferri M.H. Aliabadi
Keyword(s):  
Guided Waves ◽  
Reconstruction Algorithm ◽  
Ultrasonic Guided Waves ◽  
Patch Repair ◽  
Adhesively Bonded ◽  
Bending Fatigue ◽  
Repair Patch ◽  
Bending Fatigue Test ◽  
Bonded Composite ◽  
Detection And Localization

This work focuses on diagnostic methodologies for composite repair patch based on structural health monitoring (SHM) technology. Methodologies based on ultrasonic guided waves (GW) are developed and assessed for monitoring composite scarf repair with piezoelectric transducers. The effectiveness of the RAPID (reconstruction algorithm for probabilistic inspection of defects) algorithm was investigated for adhesively bonded composite patch repair. A composite scarf repair has been weakened by 4-point bending fatigue test and impacted after to generate a Barely Visible Damage (BVID). Both conventional RAPID technique, which requires baseline signals, and the Scaling Subtraction Method (SSM) were applied to detect damage in the bondline. The conventional method showed good performance for defect detection and localization whereas the SSM gives encouraging results for non-linear baseline-free RAPID.

Ultrasonic Guided Waves For NDE of Adhesively Bonded Structures

1995 ◽  
Vol 50 (1) ◽  
pp. 71-82 ◽  
Author(s):  
J. L. Rose ◽  
K. M. Rajana ◽  
M. K. T. Hansch
Keyword(s):  
Guided Waves ◽  
Ultrasonic Guided Waves ◽  
Adhesively Bonded ◽  
Adhesively Bonded Structures

Fatigue behavior of adhesively bonded glass fiber reinforced plastic composites with different overlap lengths

2015 ◽  
Vol 229 (7) ◽  
pp. 1292-1299
Author(s):  
E Kara ◽  
A Kurşun ◽  
MR Haboğlu ◽  
HM Enginsoy ◽  
H Aykul
Keyword(s):  
Glass Fiber ◽  
Fatigue Behavior ◽  
Laminated Composite ◽  
Element Model ◽  
Treatment Method ◽  
Epoxy Adhesive ◽  
Lap Joints ◽  
Adhesively Bonded ◽  
Glass Fiber Reinforced Plastic ◽  
Glass Fiber Reinforced

The joining techniques of lightweight and strong materials in the transport industry (e.g. automotive, aerospace, shipbuilding industries) are very important for the safety of the entire structure. In these industries, when compared with other joining methods, the use of adhesively bonded joints presents unique properties such as greater strength, design flexibility, and reduction in fuel consumption, all thanks to low weight. The aim of this study was the analysis of the tensile fatigue behavior of adhesively bonded glass fiber/epoxy laminated composite single-lap joints with three different specimen types including 30, 40 and 50 mm overlap lengths. In this study, composite adherents were manufactured via vacuum-assisted resin transfer molding and were bonded using Loctite 9461 A&B toughened epoxy adhesive. The effect of a surface treatment method on the bonding strength was considered and it led to an increment of about 40%. A numerical analysis based on a finite element model was performed to predict fatigue life curve, and the predicted results showed good agreement with the experimental investigation.

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