Acousto-ultrasonic decay in metal matrix composite panels

Kautz, Harold E.

doi:10.1007/bf02434043

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…They used neural networks to classify the data from the AU measurements. Kautz [9–12] proposed that the ultrasonic waves traveling through the test coupons are symmetric and antisymmetric Lamb waves. He measured their phase velocity and the diffuse field decay rate, a parameter that was widely used during the next years.…”

Section: Introductionmentioning

confidence: 99%

Fatigue damage monitoring in carbon fiber reinforced polymers using the acousto‐ultrasonics technique

et al. 2010

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This study focuses on the nondestructive monitoring of damage developed in carbon fiber reinforced polymers during fatigue loading via in situ acousto-ultrasonics (AU) measurements. Carbon nanotubes (CNTs) were used as modifiers of the epoxy matrix of quasi-isotropic carbon fiber reinforced laminates and consequently two composite material systems (one with matrix doped with CNTs and one with nondoped matrix) were manufactured and tested. The AU technique is utilized toward the monitoring of damage development, evolution, and accumulation during the fatigue tests. The AU waveforms acquired are processed using conventional (both in time and in frequency domain) as well as innovative wavelet-based signal processing techniques to extract parameters-indicators capable of monitoring and quantifying the damage accumulation into the test coupons. Based on the analysis of AU monitored signals, critical descriptors (parameters) were identified that show significant variation and monotonic behavior throughout the tests and thus can be proposed as potential candidate parameters for monitoring the damage development in composite materials. POLYM. COMPOS.,

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Section: Introductionmentioning

confidence: 99%

Fatigue damage monitoring in carbon fiber reinforced polymers using the acousto‐ultrasonics technique

et al. 2010

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“…Since AU is focused on assessing the distributed microdamage state of the material in between the sending and receiving transducers, it has proven quite suitable for the assessment of relative composite material state. Indeed, throughout its history, AU has been successfully used to inspect polymer matrix composite, metal matrix composite, ceramic matrix composite materials, and even metallic monolithic materials [1][2][3][8][9][10][11][12]. One major success story at NASA Glenn Research Center with AU measurements has been the correlation between β(f) and mechanical modulus (stiffness) in Silicon Carbide/Silicon Carbide (SiC/SiC) ceramic matrix composite samples seen during fatigue experiments (figure 3).…”

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confidence: 99%