Open AccessDeformation stage for quantitative acoustic emission measurements
Author(s) -
Lawson Larry
Publication year - 1995
Publication title -
scanning
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.359
H-Index - 47
eISSN - 1932-8745
pISSN - 0161-0457
DOI - 10.1002/sca.4950170510
Subject(s) - acoustic emission , transducer , displacement (psychology) , acoustics , materials science , stage (stratigraphy) , deformation (meteorology) , optics , scanning electron microscope , physics , geology , composite material , psychology , paleontology , psychotherapist
A deformation stage capable of fully reversed fatigue loading for use in the scanning electron microscope (SEM) is described. This stage incorporates a novel surface displacement transducer for the detection of acoustic emission (AE) signals, which has a flat response over a wide band and can be used as a receiver up to 12 MHz. Also described is a method for analysis of these signals to obtain the size, speed, and location of the source event. A special grip geometry is introduced such that the dynamic Greens function describing the surface displacement at the transducer contains an initial p‐wave delta function which is utilized to determine the source properties.