PVDF Film Sensor and Its Applications in Damage Detection

Luo, Hanbin; Hanagud, S.

doi:10.1061/(asce)0893-1321(1999)12:1(23)

Cited by 38 publications

(31 citation statements)

References 10 publications

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“…An alternative coupling approach is to apply a liquid gel locally over the area to be tested. Acoustic reflectance characteristics have also been used to detect structural anomaly [179]. As can be seen, these methods are extremely time consuming and, hence, expensive when large areas are to be covered.…”

Section: H Nondestructive Testingmentioning

confidence: 99%

Interdigital sensors and transducers

et al. 2004

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Section: H Nondestructive Testingmentioning

confidence: 99%

Interdigital sensors and transducers

et al. 2004

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“…Salawu and Williams (1993) demonstrate that not all curvature mode shapes are sensitive to damages. Luo and Hanagud (1999) show that it is possible to use Poli-Vinyl-Diene-Floride (PVDF) sensors directly to obtain signals that are proportional to the curvature. Wang et al (2000) proposed a different damage index that is related to energy criterion.…”

Section: Damage Measure Using Methods Based On Experimentsmentioning

confidence: 99%

Single beam analysis of damaged beams verified using a strain energy based damage measure

Dixit

Hanagud

2011

International Journal of Solids and Structures

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a b s t r a c tAnalytical expression of a new damage measure which relates the strain energy, to the damage location and magnitude, is presented in this paper. The strain energy expression is calculated using modes and natural frequencies of damaged beams that are derived based on single beam analysis considering both decrease in mass and stiffness. Decrease in mass and stiffness are a fallout of geometric discontinuity and no assumptions regarding the physical behavior of damage are made. The method is applicable to beams, with notch like non-propagating cracks, with arbitrary boundary conditions. The analytical expressions derived for mode shapes, curvature shapes, natural frequencies and an improved strain energy based damage measure, are verified using experiments. The improvement in the damage measure is that it is not assumed that the bending stiffness of the damaged beam is constant, and, equal to that of undamaged beam when calculating the strain energy of the entire beam. It is also not assumed that the bending stiffness of the element in which the damage is located is constant.

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“…The repeatability of signals generated by PVDF sensors was verified through a series of tests performed by Luo and Hanagud [9]. Zhangtt et al [10] performed a study on the use of PVDF sensors in conjunction with commercially available charge amplifiers for detecting fluctuating area-averaged strain.…”

Section: Introductionmentioning

confidence: 99%

“…A study on the use of PVDF films as dynamic strain sensors is also presented in references [9,10] and [11]. The repeatability of signals generated by PVDF sensors was verified through a series of tests performed by Luo and Hanagud [9].…”

Section: Introductionmentioning

confidence: 99%

Monitoring Fatigue Crack Growth in Compact Tension Specimens Using Piezoelectric Sensors

Gama

Morikawa

2007

Exp Mech

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This paper aims to report the results of an experimental study on the application of piezoelectric dynamic strain sensors for crack length measurement in fracture mechanics specimens. The performance of the piezoelectric sensors was assessed through fatigue crack propagation tests in compact tension (CT) specimens. Sensors of polarized polyvinilidene fluoride polymer (PVDF) were bonded to the back face of CT specimens, in the same manner as the electrical resistance strain gages installed for crack length measurement in the back face strain technique. The results showed that, mainly due to its high sensitivity to strain, the use of piezoelectric materials as dynamic strain sensors can contribute to the experimental investigation in the field of fracture mechanics.

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PVDF Film Sensor and Its Applications in Damage Detection

Cited by 38 publications

References 10 publications

Interdigital sensors and transducers

Interdigital sensors and transducers

Single beam analysis of damaged beams verified using a strain energy based damage measure

Monitoring Fatigue Crack Growth in Compact Tension Specimens Using Piezoelectric Sensors

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