Nondestructive inspection of adhesive bonded joints

Crane, Robert L.; Hart-Smith, John; Newman, John W.

doi:10.1016/b978-0-12-819954-1.00008-3

Cited by 3 publications

(3 citation statements)

References 47 publications

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“…These structures may span from small civil utility structures to large defense structures, e.g., ships and aircraft, made of materials stacked in layers through adhesive bonding [8]. The strength of the structure with adhesive bonds solely depends on the strength, durability, and performance of the bonded parts [9]. Apart from attaining a smoother surface, bonding allows complex shapes and dissimilar materials to be joined together.…”

Section: Introductionmentioning

confidence: 99%

“…Under different hostile circumstances with a varying temperature and humidity, such adhesive bonds are prone to fatigue defects, yielding failure, resulting in resin crazing, cracks, and disbands [9]. Such occurrences may cause a sudden reduction of interfacial strength, forming cracks, delamination, and damage related to debonding [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…One of the most popular NDE techniques for composite inspection is ultrasonic [9], as it can penetrate internal laminates and is sensitive to small defects. Enhancement of the sensitivity of the ultrasonic NDE method to a specific condition of a bond was previously presented using ultrasonic resonance spectroscopy and some sensitivity to the kissing bonds was demonstrated [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

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Ultrasonic Nondestructive Evaluation of Composite Bond Strength: Quantification through Bond Quality Index (BQI)

Banerjee,

Tavaf,

Indaleeb

2024

J. Compos. Sci.

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This article presents a concept, materials, and methods to devise a Bond Quality Index (BQI) for assessing composite bond quality, approximately correlating to the respective bond strength. Interface bonding is the common mechanism to join two composite structural components. Ensuring the health and quality of the bond line between two load-bearing composite structures is crucial. The article presents the classification and data-driven distinction between two types of bond lines between similar structural components. The interface bonds in composite plates were prepared using polyester peel ply and TX-1040 nylon peel ply. For all the plates, ultrasonic inspection through scanning acoustic microscopy (SAM) (>10 MHz) was performed before and after localized failure of the plate by impinging energy. Energy was impinged 0–10 J/cm2 of in the 16-ply plates, and 0–25 J/cm2 were impinged in 40-ply plates. Followed by bond failure and SAM, a new parameter called the Bond Quality Index (BQI) was formulated using ultrasonic scan data and energy data. The BQI was found to be 0.55 and 0.45, respectively, in plates with polyester peel ply and TX-1040 nylon peel ply bonds. Further, in 40-ply plates with polyester peel ply resulted in a BQI equivalent to 3.49 compared to 0.75 in plates with a TX-1040 nylon peel ply bond. Currently, the BQI is not normalized; however, this study could be used for AI-driven normalized BQIs for all types of bonds in the future.

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Section: Introductionmentioning

confidence: 99%