SYMPOSIA PAPER Published: 01 January 1972
STP35391S

Detection of Fiber Cracking By Acoustic Emission

Source

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.

Author Information

Harris, DO
Dunegan Research Corp., Livermore, Calif.
Tetelman, AS
University of California at Los Angeles, Los Angeles, Calif.
Darwish, FA
, Cairo, United Arab Republic
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Details
Developed by Committee: E07
Pages: 238–249
DOI: 10.1520/STP35391S
ISBN-EB: 978-0-8031-4611-2
ISBN-13: 978-0-8031-0116-6