Physics of ultrasound

Powles, Alexander EJ.; Martín, David; Wells, I T P; Goodwin, Christopher R.

doi:10.1016/j.mpaic.2018.01.005

Cited by 33 publications

(32 citation statements)

References 4 publications

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“…Frequencies were selected according to the thickness of steel, ultrasonic wavelength in steel, ultrasound velocity and attenuation. Ultrasonic wavelength depends on frequency and ultrasound velocity [8], [12], as in (2) /, cf…”

Section: Selection Of the Inspection Set-upmentioning

confidence: 99%

“…As a result, 5 MHz transducer has less power comparing to 3.5 MHz transducer. It is caused due to absorption of ultrasonic waves and attenuation rise by increasing frequency [8], [9]…”

Section: Comparison Of Signal Strength Of 35 Mhz and 5 Mhz Transdmentioning

confidence: 99%

“…Time of flight of various ultrasonic wave paths in the sample were calculated theoretically [8], [12], as in (3)…”

Section: Analysis Of Multiple Ultrasonic Reflectionsmentioning

confidence: 99%

“…7. The difference between the values of amplitude of reflected signals from the good and defected areas increases due to signal attenuation in steel and GFRP [8], [9]. Therefore, analysis of multiple reflections gives a higher possibility to locate defects in the joint of dissimilar materials.…”

Section: Analysis Of Multiple Ultrasonic Reflectionsmentioning

confidence: 99%

“…The objective of this research was to develop ultrasonic technique, which would enable to find defects in metal-composite adhesive joints. An analysis of ultrasonic wave characteristics was proposed for evaluation of bonding quality of joint of dissimilar materials [8]- [10].…”

Section: Introductionmentioning

confidence: 99%

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Inspection of Dissimilar Material Joints Using Ultrasonic Phased Arrays

Smagulova¹,

Jasiūnienė²

2018

ElAEE

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Ultrasonic Inspection is widely used nondestructive testing technique. However, there are limited studies in the field of inspection of metal-composite adhesive joints. Since properties of dissimilar materials are different, reflection from the bonding between metal and composite occurs even without defects in the joint, what complicates the detection of defects in the joint. This work presents numerical and experimental study of ultrasonic inspection of metalcomposite adhesive joints. The numerical investigations were carried out using CIVA software. In this work phased array transducers of 3.5 MHz and 5 MHz frequency were studied and compared. It was determined, that there is a bigger possibility to detect delaminations using 3.5 MHz transducer due to stronger signal, but the complexity of defect detection is caused by dissimilar joint itselfultrasonic signal at the interface composite-metal is reflected even without defects in it. In order to improve the probability of defect detection in the interface the analysis of multiple reflections from the bonding zone was proposed.

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Section: Selection Of the Inspection Set-upmentioning

confidence: 99%

“…As a result, 5 MHz transducer has less power comparing to 3.5 MHz transducer. It is caused due to absorption of ultrasonic waves and attenuation rise by increasing frequency [8], [9]…”

Section: Comparison Of Signal Strength Of 35 Mhz and 5 Mhz Transdmentioning

confidence: 99%

“…Time of flight of various ultrasonic wave paths in the sample were calculated theoretically [8], [12], as in (3)…”

Section: Analysis Of Multiple Ultrasonic Reflectionsmentioning

confidence: 99%

Section: Analysis Of Multiple Ultrasonic Reflectionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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