Efficient use of Lamb modes for detecting defects in large plates

Ghosh, T.; Kundu, Tribikram; Karpur, Prasanna

doi:10.1016/s0041-624x(98)00012-2

Cited by 154 publications

(87 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4 Maximum sensitivity to detect a certain flaw is achieved by launching a specific ultrasonic mode. 5 To this end one needs to control the particle displacement in the sample (direction and amplitude) at precisely determined sites. This ability to selectively generate modes with a specific frequency band and spatial pattern-called mode tuning-is important for quantitative GW inspection.…”

Section: Introductionmentioning

confidence: 99%

Phase-delayed laser diode array allows ultrasonic guided wave mode selection and tuning

Karppinen

Salmi

Moilanen

et al. 2013

Journal of Applied Physics

View full text Add to dashboard Cite

(2013). Phase-delayed laser diode array allows ultrasonic guided wave mode selection and tuning. Journal of Applied Physics, 113 (14) Selecting and tuning modes are useful in ultrasonic guided wave non-destructive testing (NDT) since certain modes at various center frequencies are sensitive to specific types of defects. Ideally one should be able to select both the mode and the center frequency of the launched waves. We demonstrated that an affordable laser diode array can selectively launch either the S 0 or A 0 ultrasonic wave mode at a chosen center frequency into a polymer plate. A fiber-coupled diode array (4 elements) illuminated a 2 mm thick acrylic plate. A predetermined time delay matching the selected mode and frequency was employed between the output of the elements. The generated ultrasound was detected by a 215 kHz piezo receiver. Our results imply that this array permits non-contacting guided wave ultrasonic NDT. The solution is small, affordable, and robust in comparison to conventional pulsed lasers. In addition, it does not require experienced operators. V C 2013 AIP Publishing LLC.[http://dx

show abstract

Section: Introductionmentioning

confidence: 99%

Phase-delayed laser diode array allows ultrasonic guided wave mode selection and tuning

Karppinen

Salmi

Moilanen

et al. 2013

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…The application of Lamb waves for flaw detection in composite structures has also attracted many researchers. In 2002, Kessler [54] studied health monitoring of composite materials, either in plate or tubular structure. The properties of Lamb wave propagation in composite structures were studied using ABAQUS, a finite element simulation code, and experiments using piezo-transducers.…”

Section: Review Of the Applications Of Guided Acousticsmentioning

confidence: 99%

On-Line Monitoring and Diagnostics of the Integrity of Nuclear Plant Steam Generators and Heat Exchangers

Upadhyaya¹,

Hines²

2004

View full text Add to dashboard Cite

show abstract

“…Ultrasonic lamb wave are being used for interpretation of plates [1], multilayer structures [2], pipes [3], rails [4], elbows [5], honeycomb structures [6], composite plates [2], and so on; also for materials characterization [7] (mainly elastic modules and stiffness constants). It can be used successfully for insulated [8] and coated pipes [9] as well as for inspection of objects under the water [10].…”

Section: Introductionmentioning

confidence: 99%