Detection of fractal characteristics based on acoustic emission

被引：4

作者：

Wang, H. J. ^{[1
]}

Lin, Z. ^{[1
]}

机构：

[1] Dalian Univ Technol, Dept Naval Architecture, Dalian 116024, Peoples R China

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2013年 / 29卷 / 02期

关键词：

Stress intensity factor; Plastic zone; Acoustic emission; Fractal dimension; Damage evolution; FATIGUE-CRACK-GROWTH; LOW-CYCLE FATIGUE; SPATIAL-DISTRIBUTION; FAILURE PROCESS; DUGDALE MODEL; PLASTIC ZONE; STEEL; MECHANISMS; BEHAVIOR; SIZE;

D O I：

10.1179/1743284712Y.0000000094

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Fractal characteristics of cracking solids are studied using acoustic emission (AE). The plastic zone size (PZS) for model I fracture has been further redefined according to fractal theory. The relationships between the stress ratio and dimensionless PZS with the fractal dimension are investigated. The results show that the increase in the fractal dimension, the dimensionless PZS constant, will substantially decrease the stress ratio. The semiempirical relationship between fractal AE count and the stress intensity factor (SIF) is studied. The results show that the fractal AE count varied with SIF in the same manner as the Paris law for crack propagation in fatigue. The exponent is a function of the fractal dimension D-f. Results by proposed method are compared with the experimental results, and fairly good agreements are observed.

引用

页码：240 / 249

页数：10

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