Non-destructive evaluation of delaminations and voids in axis-symmetric cfrp shells: Part A scope and limitation of tangential x-ray radiography

Lahiri, Jhumur; Siddalingaiah, D.L.; Kumaraguru, P.P.; Reddy, K. Satyanarayana

doi:10.1016/b978-0-444-89791-6.50132-3

Cited by 2 publications

(2 citation statements)

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“…The nondestructive evaluation (NDE) of delamination or debonding in structural members has been studied very extensively in the literature, and techniques such as ultrasonics and radiography have been studied. However, these techniques require expensive instrumentation and are not very efficient as they can only obtain information at discrete points (Lahiri et al, 1992;Khuri-Yakub et al,1997). Fiber-opticbased techniques for delamination detection have been developed by several investigations (Hofer, 1987;Elvin et al, 1990).…”

Section: Application Of the 3 * 3 Coupler-based Interferometric Sensor System To Delamination Detection In Compositesmentioning

confidence: 99%

3*3 Coupler-Based Mach-Zehnder Interferometer and Its Application in the Delamination Detection in FRP Composite

Jiang

Leung

2007

Journal of Intelligent Material Systems and Structures

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This article focuses on the development and application of a 3 * 3 coupler-based Mach-Zehnder interferometer. The software for signal demodulation is developed. Based on waveforms obtained at intermediate steps, plausible errors are analyzed and found to be small. The interferometer is then applied to the delamination detection in fiber-reinforced polymer (FRP) composites. Test results indicate the feasibility of detecting both the size and location of delamination by applying quasi-impulse loadings.

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Section: Application Of the 3 * 3 Coupler-based Interferometric Sensor System To Delamination Detection In Compositesmentioning

confidence: 99%

3*3 Coupler-Based Mach-Zehnder Interferometer and Its Application in the Delamination Detection in FRP Composite

Jiang

Leung

2007

Journal of Intelligent Material Systems and Structures

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“…The non-destructive evaluation (NDE) of delamination or debonding in structural members has been studied very extensively in the literature, which includes popular techniques such as ultrasonics and radiography. However, these techniques require expensive instrumentation and are not very efficient due to their point sensing methods [3,4]. In 1980's, fiber-optic based techniques for delamination detection have been developed by many investigations [5~8].…”

Section: Introductionmentioning

confidence: 99%

Delamination Patch Detection in FRP Composite with 3×3 Coupler Based Mach-Zehnder Interferometer

Dong

Jiang

2010

AMR

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A 3×3 coupler based Mach-Zehnder Interferometer is used for delamination patch detection in FRP composite. Mechanical tests are performed and the sensing arm of the interferometer is embedded along the neutral plane of the laminate. A quasi-impulse loading is applied and the total elongation of the embedded optical fiber is measured as a function of load position. When a delamination is present, the shift of neutral axis position can be clearly reflected in the fiber integral strain versus load position plot. Experimental results demonstrate the feasibility of detecting both the size and location of delamination patch with the proposed technique.

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Non-destructive evaluation of delaminations and voids in axis-symmetric cfrp shells: Part A scope and limitation of tangential x-ray radiography

Cited by 2 publications

References 1 publication

3*3 Coupler-Based Mach-Zehnder Interferometer and Its Application in the Delamination Detection in FRP Composite

3*3 Coupler-Based Mach-Zehnder Interferometer and Its Application in the Delamination Detection in FRP Composite

Delamination Patch Detection in FRP Composite with 3×3 Coupler Based Mach-Zehnder Interferometer

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