title: The Identification of the Deformation Stage of a Metal Specimen Based on Acoustic Emission Data Analysis.
abstract: The acoustic emission (AE) signals of metal materials have been widely used to identify the deformation stage of a pressure vessel. In this work, Q235 steel samples with different propagation distances and geometrical structures are stretched to get the corresponding acoustic emission signals. Then the obtained acoustic emission signals are de-noised by empirical mode decomposition (EMD), and then decomposed into two different frequency ranges, i.e., one mainly corresponding to metal deformation and the other mainly corresponding to friction signals. The ratio of signal energy between two frequency ranges is defined as a new acoustic emission characteristic parameter. Differences can be observed at different deformation stages in both magnitude and data distribution range. Compared with other acoustic emission parameters, the proposed parameter is valid in different setups of the propagation medium and the coupled stiffness.
authors.affiliation: College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China. zoushenao@163.com.
authors.forename: Shenao
authors.initials: S
authors.lastname: Zou
authors.affiliation: Beijing Key Lab of Membrane Science and Technology, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China. yfy2013@163.com.
authors.forename: Fengying
authors.initials: F
authors.lastname: Yan
authors.affiliation: College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China. yangga@mail.buct.edu.cn.
authors.forename: Guoan
authors.initials: G
authors.lastname: Yang
authors.affiliation: Beijing Key Lab of Membrane Science and Technology, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China. sunwei@mail.buct.edu.cn.
authors.forename: Wei
authors.initials: W
authors.lastname: Sun
keywords: acoustic emission; empirical mode decomposition; metal deformation degree; signal energy ratio; tensile test