Towards Characterizing the Microdynamics of AE Generation in Machining

Abstract

This article presents a conceptual framework based on combining statistical mechanics and ray acoustic theory to derive models of how acoustic emission (AE) generated from the prominent atomistic sources in the shear zone of a machining process is consolidated to make up the measured AE waveform. A proof-of-concept implementation of the modeling framework shows that the resulting model solutions can emulate the bursts, transients, and other salient features present in a measured AE waveform.

Notes

^aWe note that for our proof-of-concept implementations, we had used the rough-cut distributions of macroscopic variables reported in Shih (1993 1996b); Shih and Yang (1993). The waveform characteristics were insensitive to minor variations in the distributions of macroscopic variables.

^bNote that to the shear plane coordinates (x, y) are related to the coordinates (x, y, z), defined relative to the workpiece geometry, as (x, y, 0) = (x, y, z).