Open AccessFatigue failure warning method for needled ceramic matrix composite by acoustic emission monitoring
Author(s) -
Geng Hou,
DeGuang Shang,
LinXuan Zuo,
LinFeng Qu,
Jay Sanjayan,
Shuzhen Wu,
YiEr Guo
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2125/1/012039
Subject(s) - acoustic emission , materials science , composite number , ceramic , composite material , ceramic matrix composite , matrix (chemical analysis) , fatigue testing , structural engineering , engineering
Ceramic matrix composite is a kind of mechanical engineering material with excellent high temperature mechanical properties, which has been widely used in aircraft propulsion system and thermal protection system. Therefore, it is of great significance to study the fatigue failure of needled ceramic matrix composite. In this investigation, based on the realtime acoustic emission (AE) monitoring of needled C/SiC ceramic matrix composite, the characteristics of AE energy during the fatigue damage process were obtained. In addition, considering the emission coefficient of AE energy and the threshold value of AE energy in single cycle, a method for judging the imminent fatigue failure of needled composite was proposed. By comparing the cycle of failure warning by proposed method with the experimental fatigue life, the proposed method can provide fatigue failure warning near and before fatigue failure.