A new approach to the evaluation of danger of short fatigue cracks

被引：3

作者：

Kotrechko S.A. ^{[1
]}

Meshkov Yu.Ya. ^{[1
]}

Mettus G.S. ^{[1
]}

Nikonenko D.I. ^{[1
]}

机构：

[1] Institute of Physics of Metals, National Academy of Sciences of Ukraine, Kiev

来源：

Strength of Materials | 2000年 / 32卷 / 03期

关键词：

Building materials - Brittle fracture;

D O I：

10.1007/BF02509857

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We demonstrate the possibility of using new physically substantiated characteristics of toughness of metals and the embrittling action of stress concentrators proposed by the authors somewhat earlier in the analysis of brittle fracture initiated by short cracks. We describe a procedure for the experimental determination of a parameter characterizing the embrittling action of these defects and obtain an approximate expression for its evaluation in the presence of a short crack. For typical structural steels, we establish the dependence of the toughness margin of steel with a short crack on the level of strength of this material. We also formulate the requirements on the level of toughness of steels guaranteeing that defects of this type are not dangerous. © 2000 Kluwer Academic/Plenum Publishers.

引用

页码：286 / 291

页数：5

共 9 条

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