Patterns of acoustic emission changes with alterations in the damage area of a composite material according to the Mises criterion

Abstract

This paper considers the use of a highly sensitive acous‐tic emission method for studying the deformation and failure processes of composite materials. This providesa substantial amount of information about phenomena occurring at the sub‐micro, micro, and macro levels. How ever, the additional influence of various factors leads to the problem of interpreting and identifying the infor‐mation yielded by this process. Addressing this problem involves determining the influence of different factors on acoustic emission‐signal parameters and their sensitivity to the influencing factors. In this study, during the failure of composite material under transverse force according to the Mises criterion, an analysis is conducted on the impact of changes in the number of composite material elements (damage area) on the amplitude‐time param‐eters of the acoustic emission signal based on a devel‐oped signal model. The results of the simulation allow for the identification and description of patterns in the changes of amplitude‐time parameters of acoustic emis‐sion signals (maximum amplitude, area under the signal curve, and signal duration), with variations in the number of composite material elements. These patterns enable the determination of the sensitivity of acoustic emission signal parameters to the influencing factor. The findings of this study may be of interest in the development of methods for monitoring, diagnosing, and predicting the failure of composite materials and products through the registration and analysis of acoustic emission signals.