STP505

    Detection of Fiber Cracking By Acoustic Emission

    Published: Jan 1972


      Format Pages Price  
    PDF Version (200K) 12 $25   ADD TO CART
    Complete Source PDF (6.0M) 12 $104   ADD TO CART


    Abstract

    A theoretical model is presented that relates acoustic emission to fiber cracking which occurs during a rising load tension test on a fiber reinforced composite. The percentage of broken fibers in an Al3Ni fiber reinforced aluminum was measured as a function of tensile strain by optical inspection of the polished surface of strained specimens. This information was used in conjunction with the proposed model to predict the acoustic emission response of the composite material. These predictions were compared with experimental observations, and a good agreement was obtained between the two sets of results. These results indicate that it is possible to relate acoustic emission quantitatively to the micromechanics of the deformation processes occurring within fiber reinforced composites, thereby demonstrating the applicability of acoustic emission to materials studies and also to nondestructive evaluation of the integrity of composite materials.

    Keywords:

    nondestructive tests, composite materials, fiber composites, cracking (fracturing), tension tests, strains, deformation, acoustics, emission, elastic waves, failure, fractures (materials), stress waves


    Author Information:

    Harris, DO
    Director of Research, Dunegan Research Corp., Livermore, Calif.

    Tetelman, AS
    University of California at Los Angeles, Los Angeles, Calif.

    Darwish, FA
    Cairo,


    Paper ID: STP35391S

    Committee/Subcommittee: E07.04

    DOI: 10.1520/STP35391S


    CrossRef ASTM International is a member of CrossRef.