THEORETICAL-EXPERIMENTAL APPROACH TO THE ANALYSIS OF FATIGUE CRACK PROPAGATION IN HYDROGENATED MATERIALS

被引：1

作者：

Ivanyts'kyi, Ya L. ^{[1
]}

Kun, P. S. ^{[1
]}

Shtayura, S. T. ^{[1
]}

Mochul's'kyi, V. M. ^{[1
]}

机构：

[1] Ukrainian Natl Acad Sci, Karpenko Physicomech Inst, Lvov, Ukraine

来源：

MATERIALS SCIENCE | 2010年 / 46卷 / 02期

关键词：

elastoplastic body; fatigue crack; hydrogen-containing media; deformation model; energy fracture criterion;

D O I：

10.1007/s11003-010-9279-z

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We propose a theoretical-experimental model of fatigue crack growth in hydrogen-containing media. The model is based on the regularities of exhaustion of energy accumulated in a material under the conditions of cyclic fracture and the influence of hydrogen-containing media on the mechanical characteristics of the material. By using the deformation approach of fracture mechanics, we deduce analytic dependences for the determination of the conditions of elastoplastic deformation of the material near the crack tip. The effects of crack closure and loading ratio are taken into account. The interactions of various phenomena caused by hydrogen and their general influence on the changes in the fatigue-crack growth rate are evaluated. We also compare the computed values of the fatigue-crack growth rate with experimental values for two types of steel under different conditions.

引用

页码：213 / 220

页数：8

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