Experimental study on acoustic emission (AE) characteristics and crack classification during rock fracture in several basic lab tests

2020 ◽  
Vol 133 ◽  
pp. 104411 ◽  
Author(s):  
Kun Du ◽  
Xuefeng Li ◽  
Ming Tao ◽  
Shaofeng Wang
Keyword(s):  
Experimental Study ◽  
Acoustic Emission ◽  
Rock Fracture ◽  
Crack Classification

Experimental study on compression–bending damage of segmental joints based on acoustic emission

2021 ◽  
Vol 115 ◽  
pp. 104078
Author(s):  
Li Zhang ◽  
Kun Feng ◽  
Chuan He ◽  
Zimeng Shao ◽  
Wenqi Guo ◽  
...  
Keyword(s):  
Experimental Study ◽  
Acoustic Emission

scholarly journals Monitoring of Changes Signal Acoustic Emission Signals Using Waveguides

2017 ◽  
Vol 65 (4) ◽  
pp. 1317-1322 ◽  
Author(s):  
Jaroslav Začal ◽  
Petr Dostál ◽  
Michal Šustr ◽  
David Dobrocký
Keyword(s):  
Experimental Study ◽  
Stainless Steel ◽  
Acoustic Emission ◽  
Signal Detection ◽  
Piezoelectric Sensors ◽  
Material Surface ◽  
Medium Density ◽  
Medium Density Fibreboard ◽  
Ae Signal ◽  
Signal Dampening

This paper is focused on possibilities of acoustic emission (AE) signal detection from material surface through waveguide for commonly used piezoelectric sensors. It also considers the experimental study of enhanced detection of occurrence of signal guided through waveguide corpus, its changes and deformities. Aim of this work is verification of several waveguide setup possibilities for maximization of AE signal detection in practice. For this purpose, multiple waveguide setups were manufactured from stainless steel and aluminium alloy. Hsu‑Nielson pen test was utilized for signal actuation. Results demonstrate the differences between measured AE signal with and without employment of waveguide (changes in signal course through different materials and shapes), as well as magnitude of signal dampening and amplification necessary for veritable signal interpretation. Measurements were conducted on agglomerated composite of medium density fibreboard (MDF).

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