Cracking of human teeth: An avalanche and acoustic emission study

被引：14
作者：
Wang, Lei [1 ]
Cao, Shutian [2 ]
Jiang, Xiang [1 ,3 ]
Salje, Ekhard K. H. [1 ,3 ]
机构：
[1] Chongqing Univ, Sch Civil Engn, Chongqing 400045, Peoples R China
[2] Tongji Univ, Dept Geotech Engn, Coll Civil Engn, Shanghai 200092, Peoples R China
[3] Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England
来源：
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS | 2021年 / 122卷
基金：
英国工程与自然科学研究理事会;
关键词：
Acoustic emission; Human teeth; Cracking; Mean field theory; Power law; CRACKLING NOISE; MODEL; PREDICTABILITY; DISTRIBUTIONS; FAILURE; LAW;
D O I：
10.1016/j.jmbbm.2021.104666
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
Teeth are the hardest part of the human body. Cracking of human teeth under compression progresses by avalanches emitting acoustic noise. Acoustic emission (AE) spectroscopy reveals that tooth avalanches are statistically fully compatible with predictions of mean field (MF) theory. Avalanche energies collapse into a power law distributed which is stable over more than five decades with an energy exponent e = 1.4. Acoustic amplitudes (exponent -T), durations (-alpha), correlations between amplitudes and energies (-x), and correlations between amplitude and duration (-chi) follow equally power laws with MF values of all exponents. The exponents correlation: T-1 = x(e-1) = (alpha-1)/chi is confirmed. Crack propagation bifurcates and shows the hallmarks of avalanches where main cracks nucleate secondary cracks.
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页数：6
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