Neutron Radiographic Inspection of Industrial Components using Kamini Neutron Source Facility

Raghu, N.; Anandaraj, V.; Kasiviswanathan, K.V.; Kalyanasundaram, P.

doi:10.1063/1.2906066

Cited by 9 publications

(1 citation statement)

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“…7,8 The structure is excited by ultrasound, which causes heating of flawed rivets by dissipation and thermography is used to detect heated regions. More generally, methods using Eddy current, [9][10][11] x-radiography, 12,13 or magneto-optic interactions 14,15 are also either in progress or already employed for riveted structures.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear acoustic resonances to probe a threaded interface

Rivière

Renaud

Haupert

et al. 2010

Journal of Applied Physics

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We evaluate the sensitivity of multimodal nonlinear resonance spectroscopy to torque changes in a threaded interface. Our system is comprised of a bolt progressively tightened in an aluminum plate. Different modes of the system are studied in the range 1-25 kHz, which correspond primarily to bending modes of the plate. Nonlinear parameters expressing the importance of resonance frequency and damping variations are extracted and compared to linear ones. The influence of each mode shape on the sensitivity of nonlinear parameters is discussed. Results suggest that a multimodal measurement is an appropriate and sensitive method for monitoring bolt tightening. Further, we show that the nonlinear components provide new information regarding the interface, which can be linked to different friction theories. This work has import to study of friction and to nondestructive evaluation of interfaces for widespread application and basic research.

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