NASA Technical Reports Server (NTRS) : Acousto pdf

NASA Technical Reports Server (NTRS) : Acousto

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Description of the Book:

The concept of acousto-ultrasonic (AU) waveform partitioning was applied to nondestructive evaluation of mechanical properties in filament wound composites (FWC). A series of FWC test specimens were subjected to AU analysis and the results were compared with destructively measured interlaminar shear strengths (ISS). AU stress-wave factor (SWF) measurements gave greater than 90 percent correlation coefficient upon regression against the ISS. This high correlation was achieved by employing the appropriate time and frequency domain partitioning as dictated by wave propagation path analysis. There is indication that different SWF frequency partitions are sensitive to ISS at different depths below the surface

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 1/1/1986
• Year: 1986
• Book Topics/Themes: NASA Technical Reports Server (NTRS), ACOUSTIC MEASUREMENT, COMPOSITE MATERIALS, FILAMENT WINDING, FRACTURE STRENGTH, MECHANICAL PROPERTIES, NONDESTRUCTIVE TESTS, ULTRASONIC TESTS, INTERLAYERS, LAMINATES, SPECTRUM ANALYSIS, STRESS WAVES, WAVEFORMS, Kautz, H. E

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