Open AccessStudies on the relationship between acoustic emission characteristics and fractu re toughness of materials
Author(s) -
Zhu Bo,
Xiaoqing Cai,
Chengguo Wang,
Cai Hua-su
Publication year - 2003
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.52.1960
Subject(s) - acoustic emission , materials science , ultimate tensile strength , cracking , composite material , fracture toughness , toughness , alloy
The corelation between acoustic emission characteristics and their fracture toughness has been investigated in this paper based on the study of high-strength al uminum alloy cracking process by using advanced acoustic emission experiment sys tem and smooth tensile specimens as well as DCB specimens with premade cracks. E xperimental results showed that the specimens emitted strong signals with an amp litude above 35 dB when a stable crack extension started at K1C. Stro nger and more complicated acoustic emission signals were found during unstable crack extension, and the cumulative energy of acoustic emission events were found to b e linearly related with the macroscopic fracture energy.