An experimental test of the critical behaviour of fracture precursors

被引：167

作者：

Guarino, A ^{[1
]}

Garcimartin, A ^{[1
]}

Ciliberto, S ^{[1
]}

机构：

[1] Univ Navarra, Fac Ciencias, Dept Fis, Pamplona 31080, Spain

来源：

EUROPEAN PHYSICAL JOURNAL B | 1998年 / 6卷 / 01期

关键词：

D O I：

10.1007/s100510050521

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The statistical properties and the localization of fracture precursors on heteregeneous materials is studied by recording their acoustic emission as a function of the applied load. St's found that the microcrack cluster together as the load increases and the instantaneous acoustic energy has an invariant power law distribution. The integrated acoustic energy presents a critical divergency close to the failure load for the sample. These result support the idea that fracture can be viewed as a critical phenomenon. Finally a measure of the concentration of microcraks, which allows us to predict the failure load, is introduced. These properties are studied also when a periodic load is applied to the sample. It's found that the Kaiser effect is not strictly satisfied in heteregeneous materials.

引用

页码：13 / 24

页数：12

共 46 条

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