UDK. 620.179:534.6

S.F. Filonenko, Doctor of Engineering, Professor

O.P. Kosmach, post-graduate student

National Aviation University

ACOUSTIC EMISSION with NONLINEARity of DEFORMATION AND THRESHOLD CHANGE of DESTRUCTION RATE OF COMPOSITE MATERIAL

Signals of acoustic emission taking into account nonlinearity of a composite deformation and threshold type of change of fibers destruction speed in a critical area are described using relaxation model of composite material destruction.

Introduction

Acoustic Emission (AE) is one of the methods of composite materials diagnostics. Theoretic and experimental research, directed to establish of acoustic radiation, are used for development of control methods and danger criteria assess of processes, developing in structure of a composite material.  From this point of view theoretic research with development of models of AE signals are very important.