Acousto-ultrasonic analysis of failure in ceramic matrix composite tensile specimens
Read Online
Share

Acousto-ultrasonic analysis of failure in ceramic matrix composite tensile specimens

  • 218 Want to read
  • ·
  • 49 Currently reading

Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC], [Springfield, Va .
Written in English

Subjects:

  • Fiber-reinforced ceramics.

Book details:

Edition Notes

StatementHarold E. Kautz and Abhisak Chulya.
SeriesNASA technical memorandum -- 106219.
ContributionsChulya, Abhisak., United States. National Aeronautics and Space Administration.
The Physical Object
FormatMicroform
Pagination1 v.
ID Numbers
Open LibraryOL18065297M

Download Acousto-ultrasonic analysis of failure in ceramic matrix composite tensile specimens

PDF EPUB FB2 MOBI RTF

The acousto-ultrasonic approach uses analysis of simulated stress waves for acousto-ultrasonic waves are launched periodically at predetermined times and whether the laminates are polymer, metal, or ceramic matrix fiber reinforced composites. Echo System. - The File Size: 1MB. The nature and underlying rationale of the acousto-ultrasonic approach is reviewed, needed advanced signal analysis and evaluation methods suggested, and application potentials : Alex Vary. The geometry of transverse and fibre pull-out test samples are shown in Figs l(a,b). Fig. 1. Geometry of the (a) transverse test and (b) fibre pullout test of composite samples. Acousto-ultrasonic technique in composite evaluation Acousto-ultrasonic test The experimental set-up for the measurement of stress wave factor is shown in Fig. by: 4.   Acousto-ultrasonic (A-U) decay rates (UD) were measured in metal matrix composite (MMC) panels. The MMC panels had fiber architectures and cross-sectional thicknesses corresponding to those designed for aerospace turbine engine structures. The wavelength-to-thickness ratio produced by the combination of experimental frequency setting conditions and specimen geometry was found to be Cited by: 5.

The acousto-ultrasonic method appears to be a viable one for assessing of composite repair integrity. Composite patch debonding can be detected and correlated with various readings and parameters, such as, strain, ringdown stress wave factor (SWF), peak voltage (V max)' energy, acousto-ultrasonic parameter (AUP), and waveform correlation factor. The composite consisted of a barium magnesium aluminosilicate (BMAS) glass-ceramic matrix reinforced with SiC fibers with a SiC/BN coating. The material exhibited retention of most tensile properties up to 1, C. Monotonic tensile fracture tests produced ultimate strengths of MPa with failure strains of {approximately}1%, and no. @article{osti_, title = {Fatigue behavior of a cross-ply ceramic matrix composite at elevated temperature under tension-tension loading. Master`s thesis}, author = {Steiner, C.D.}, abstractNote = {This study investigated the fatigue behavior and damage mechanisms of a (0/90)4s SiC/MAS ceramic matrix composite under tension-tension loading at two elevated temperatures and two frequencies. Kautz, H.E., Bowman, C., and Baaklini, G.Y., " Comparison of Contact and Non- Contact Acousto-Ultrasonic NDE on Fatigue Cycled SCS-6/Ti Metal Matrix Composite Tensile Specimens, " To be.

ACOUSTIC EMISSION/ACOUSTO-ULTRASONIC DATA FUSION FOR DAMAGE EVALUATION IN CONCRETE optical microscopy and chemical analysis to assess the effects of adverse loads, environment, etc. Acoustic Emission (AE) can provide information about developing damage at early stages and the All specimens were compressed to failure and monitored. 1. Scope. This guide explains the rationale and basic technology for the acousto-ultrasonic (AU) method. Guidelines are given for nondestructive evaluation (NDE) of flaws and physical characteristics that influence the mechanical properties and relative strength of composite structures (for example, filament-wound pressure vessels), adhesive bonds (for example, joints between metal plates. This paper presents a brief overview of acousto-ultrasonic SHM techniques and discusses the PWAS-based SHM principle of aerospace composite materials. It follows with a discussion of the passive and the active acousto-ultrasonic SHM techniques. The paper ends with a conclusion and guidelines for future work. Background. This guide explains the rationale and basic technology for the acousto-ultrasonic (AU) method. Guidelines are given for nondestructive evaluation (NDE) of flaws and physical characteristics that influence the mechanical properties and relative strength of composite structures (for example, filament-wound pressure vessels), adhesive bonds (for example, joints between metal plates), and.