Air-coupled ultrasonic investigation of multi-layered composite materials

Kažys, R.; Demčenko, Andriejus; Žukauskas, Egidijus; Mažeika, Liudas

doi:10.1016/j.ultras.2006.05.112

Cited by 91 publications

(44 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Researchers have been working to improve the accuracy, in the case of identifying defects in composite materials. Kazys, Demcenko, Zukauskas and Mazeika (2006) and Zukauskas, Cicenas and Kazys, (2005) both observed that the air-coupled ultrasonic technique is quite efficient in detecting the non-homogeneity and delamination type defects in composite and layered materials. In the research performed by Zukauskas and Kazys (2007), the air-coupled ultrasonic method showed substantial effect, when investigating aerospace composite materials with artificial delamination type defects and determining defect size accurately.…”

Section: Application Based Methodsmentioning

confidence: 98%

Comparative Analysis of Non-Contact Ultrasonic Methods for Defect Estimation of Composites in Remote Areas

Tiwari

Raišutis

2016

CBUP

View full text Add to dashboard Cite

There are various ultrasonic systems, developed for the effective testing and estimation of defect parameters in composite materials. Non-contact ultrasonic testing has already achieved significance over traditional contact methods that require coupling of media and are not well suited for the transmission of surface acoustic waves (SAW), which can cover a large area of structure under investigation. This paper compares approaches of air-coupled transmission/reception, laser ultrasonic, and electromagnetic acoustic transducer (EMAT), for testing and verification of composites and defect estimation in remote areas. It reviews the various practical applications. The study found the hybrid solution, consisting of the laser system as a transmitter and the air-coupled method as a detector, is the best among all. UDC Classification: 620 DOI: http://dx

show abstract

Section: Application Based Methodsmentioning

confidence: 98%

Comparative Analysis of Non-Contact Ultrasonic Methods for Defect Estimation of Composites in Remote Areas

Tiwari

Raišutis

2016

CBUP

View full text Add to dashboard Cite

show abstract

“…In this case of non-contact application the Lamb waves technique requires that the orientation angles of transmitting and receiving ultrasonic transducers should correspond to the optimal angles for excitation and reception the asymmetric mode of Lamb waves at each scanning step [4]. In the case of composite materials investigations using such technique the losses of ultrasonic signal being received are sufficiently high, up to 130 dB.…”

Section: Air-coupled Examination Of the Composite Based Materials Havmentioning

confidence: 99%

Application of ultrasonic guided waves for non-destructive testing of large and complex geometry engineering structures

Raišutis¹,

Kažys²,

Mažeika³

et al. 2017

Vib. proced.

View full text Add to dashboard Cite

The wide group of large engineering constructions made from welded metal components and modern composite materials during daily exploitation under non-stationary loads, continuous influence of vibrations and complicated environmental conditions have demand of periodical tests in order to avoid appearance and evolution of the defects. All of them have one common feature – large areas to be tested and the complex geometry. The objective is to improve air-coupled and contact type testing techniques for excitation and reception of appropriate modes of ultrasonic guided waves in large and complex structures. Also, to develop inspection techniques which enable to detect required types of internal defects. The air-coupled and contact ultrasonic techniques for investigation of large and complex geometry objects, such as composites for aerospace applications and petroleum tanks, have been developed. The investigation of propagation effects of ultrasonic guided (Lamb) waves in the plates of the tank floor has indicated relation between reconstructed properties of guided waves and expected presence of corrosion deposits.

show abstract

“…In fact, the detail analysis of the phenomenon of lamb wave interaction with honeycomb could not be found in literature. Kayzs et al [8] have numerically predicted the lamb wave interaction with honeycomb.…”

Section: Honeycomb Panelmentioning

confidence: 99%

Plate Wave Resonance With Air-Coupled Ultrasonics

Bar

Dayal

Barnard

et al. 2010

AIP Conference Proceedings

View full text Add to dashboard Cite

Air-coupled ultrasonic transducers can excite plate waves in metals and composites. The coincidence effect, i.e., the wave vector of plate wave coincides with projection of exciting airborne sound vector, leads to a resonance which strongly amplifies the sound transmission through the plate. The resonance depends on the angle of incidence and the frequency. In the present study, the incidence angle for maximum transmission (θ max )is measured in plates of steel, aluminum, carbon fiber reinforced composites and honeycomb sandwich panels. The variations of (θ max ) with plate thickness are compared with theoretical values in steel, aluminum and quasi-isotropic carbon fiber composites. The enhanced transmission of air-coupled ultrasound at oblique incidence can substantially improve the probability of flaw detection in plates and especially in honeycomb structures. Experimental air-coupled ultrasonic scan of subtle flaws in CFRP laminates showed definite improvement of signal-to-noise ratio with oblique incidence atθ max . Application of zerorange models to the problem of diffraction by a small hole in elastic plate J. Math. Phys. 34, 2226Phys. 34, (1993 Additional information on AIP Conf. Proc. ABSTRACT. Air-coupled ultrasonic transducers can excite plate waves in metals and composites. The coincidence effect, i.e., the wave vector of plate wave coincides with projection of exciting airborne sound vector, leads to a resonance which strongly amplifies the sound transmission through the plate. The resonance depends on the angle of incidence and the frequency. In the present study, the incidence angle for maximum transmission (θ max ) is measured in plates of steel, aluminum, carbon fiber reinforced composites and honeycomb sandwich panels. The variations of (θ max ) with plate thickness are compared with theoretical values in steel, aluminum and quasi-isotropic carbon fiber composites. The enhanced transmission of air-coupled ultrasound at oblique incidence can substantially improve the probability of flaw detection in plates and especially in honeycomb structures. Experimental air-coupled ultrasonic scan of subtle flaws in CFRP laminates showed definite improvement of signal-to-noise ratio with oblique incidence at θ max . Keywords

show abstract

Air-coupled ultrasonic investigation of multi-layered composite materials

Cited by 91 publications

References 12 publications

Comparative Analysis of Non-Contact Ultrasonic Methods for Defect Estimation of Composites in Remote Areas

Comparative Analysis of Non-Contact Ultrasonic Methods for Defect Estimation of Composites in Remote Areas

Application of ultrasonic guided waves for non-destructive testing of large and complex geometry engineering structures

Plate Wave Resonance With Air-Coupled Ultrasonics

Contact Info

Product

Resources

About