Impact-Delamination Detection in Repaired-Composite Laminates Using Numerical and Ultrasonic Method

Çalışkan, Umut; Yildiz, Fikret; Teke, Samet; Özdemir, Ahmet Turan

doi:10.1007/s10921-022-00878-x

Cited by 4 publications

(1 citation statement)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Traditional NDT techniques, such as ultrasonics [5,6], acoustic emission [7,8], and thermal imaging [9], primarily focus on detecting material discontinuities, like cracks and defects, to determine the presence of damage within or on the surface of structures. However, these methods have notable limitations, including stringent requirements for the testing environment, restrictions on the size of the structure that can be tested, and high operational costs, rendering them less suitable for marine engineering applications [10].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Damage Localization in GFRP Composite Plates: A Novel Approach Using Feedback Optimization and Multi-Label Classification

Cao,

Liao,

Yan

et al. 2024

Processes

View full text Add to dashboard Cite

Damage localization in GFRP (glass-fiber-reinforced polymer) composite plates is a crucial research area in marine engineering. This study introduces a feedback-based damage index (DI) combined with multi-label classification to enhance the accuracy of damage localization and address scenarios involving multiple damages. The research begins with the creation of a modal database for yachts’ GFRP composite plates using finite element modeling (FEM). A method for deriving a feedback-weighted matrix, based on the accuracy of the DI, is then developed. Sensitivity analysis reveals that the feedback DI is 50% more sensitive than the traditional DI, reducing false positives and missed detections. The associated feedback-weighted matrix depends solely on the structural shape, ensuring its transferability. To address the challenge for localizing multiple damages, a multi-label classification approach is proposed. The synergy between the feedback optimization and multi-label classification enables the rapid and precise localization of multiple damages in GFRP composite plates. Modal testing on damaged GFRP plates confirms the enhanced accuracy for combining the feedback DI with multi-label classification for pinpointing damage locations. Compared with traditional methods, this feedback DI method improves sensitivity, while multi-label classification effectively handles multiple damage scenarios, enhancing the overall efficiency of the damage diagnosis. The effectiveness of the proposed methods is validated through experimentation, offering robust theoretical support for composite plate damage diagnostics.

show abstract

Section: Introductionmentioning

confidence: 99%

Enhancing Damage Localization in GFRP Composite Plates: A Novel Approach Using Feedback Optimization and Multi-Label Classification

Cao,

Liao,

Yan

et al. 2024

Processes

View full text Add to dashboard Cite

show abstract

Repairing of recycled hybrid carbon fiber laminates

Proietti,

Quadrini,

Santo

2024

Polymer Composites

View full text Add to dashboard Cite

Compression molded hybrid laminates have been manufactured by stacking 10 recycled epoxy‐based carbon fiber plies with interlaminar polyamide film of 50 μm thickness. At first, carbon fiber (CF) reinforced composites underwent thermo‐mechanical disassembly to obtain single composite CF plies. These plies, still impregnated with the waste cured resin, have been re‐assembled by interposing one or two sheets of the thermoplastic film in the lamination sequence. Neat laminates have been used for comparison. Samples of size 85 × 30 mm2 have been tested under bending load, and materials repairability has been evaluated under 2 consecutive repairing cycles that have been carried out by applying pressure and heat along the composite failure line. Even though the neat composite showed the best mechanical properties, after the first repairing cycle a drastic drop has been recorded with a reduction of the elastic modulus of 92.4%. On the other hand, the elastic modulus of the hybrid composites has been reduced of only 24% on average.Highlights Thermo‐mechanical disassembly is used to recycle epoxy carbon fiber composite. Hybrid laminates are obtained by placing polyamide film between recycled plies. Pressure and heat are applied along the composite failure line for repairing. Hybrid composites repairing is carried out in comparison with neat materials. Repaired hybrid laminates have a higher elastic modulus than neat once.

show abstract

Nondestructive Characterization of Multiscale Defects in an Aluminum Alloy After Cold Spray Repair

Daly

et al. 2023

J Nondestruct Eval

View full text Add to dashboard Cite

Impact-Delamination Detection in Repaired-Composite Laminates Using Numerical and Ultrasonic Method

Cited by 4 publications

References 36 publications

Enhancing Damage Localization in GFRP Composite Plates: A Novel Approach Using Feedback Optimization and Multi-Label Classification

Enhancing Damage Localization in GFRP Composite Plates: A Novel Approach Using Feedback Optimization and Multi-Label Classification

Repairing of recycled hybrid carbon fiber laminates

Nondestructive Characterization of Multiscale Defects in an Aluminum Alloy After Cold Spray Repair

Contact Info

Product

Resources

About