Fatigue property analysis of rail steel based on damage mechanics

被引：2

作者：

Iwafuchi, Kengo ^{[1
]}

Satoh, Yukio ^{[1
]}

Toi, Yutaka ^{[2
]}

Hirose, Satoshi ^{[2
]}

机构：

[1] Frictional Materials, Materials Technology Div.

[2] Dept. Mechanical Systems, Institute of Industrial Science, University of Tokyo

来源：

Quarterly Report of RTRI (Railway Technical Research Institute) (Japan) | 2004年 / 45卷 / 04期

关键词：

Continuum damage mechanics; Damage; Fatigue; Life; Rail steel;

D O I：

10.2219/rtriqr.45.203

中图分类号：

学科分类号：

摘要：

After a few decades of studies to establish a theoretical basis, the continuum damage mechanics is now finding engineering applications as an effective modeling method to evaluate the damage, fatigue and life of materials. Before applying the method, it is necessary to determine some material parameters to characterize the damage and fatigue behaviors of the material in question. In this study, the material parameters of the rail steel used for the JIS 50kg N rail were determined based on its stress-strain curve and S-N curve. By using these parameters it was demonstrated that numerical analyses could successfully reproduce these curves. As a simple application of the method, the fatigue life of a bar made of rail steel subjected to repeated three-point bending was predicted and compared with the fatigue life obtained experimentally. That the life span values obtained through analysis agreed well with those from experiments shows that the analysis based on damage mechanics is a useful method to predict rail fatigue life.

引用

页码：203 / 209

页数：6

共 8 条

[1]

Kachanov L.M., On the time to failure under creep conditions, Izu. an SSSR, Otd. Tekhn. Nauk, 8, pp. 26-31, (1958)

[2]

Kachanov L.M., Introduction to Continuum Damage Mechanics, (1986)

[3]

Lemaitre J., A Course on Damage Mechanics 2nd Ed., (1996)

[4]

Toi Y., Non-linear finite element analysis of solid structures on the basis of material damage, Science of Mechanics, 52, 11, pp. 1-8, (2000)

[5]

Murakami S., Takizawa H., Umeda T., Itoh M., Application of damage mechanics to the analysis of spall damage, Transactions of the Japan Society of Mechanical Engineers (A), 60, 578, pp. 230-235, (1994)

[6]

Perzyna P., Modified theory of viscoplasticity application to advanced flow and instability phenomena, Arch. Mech., 32, 3, pp. 403-420, (1986)

[7]

Toi Y., Yamazaki S., Low-cycle and high-cycle fatigue simulation of aluminum alloy by damage mechanics model, Journal of Institute of Industrial Science, 55, 2, pp. 28-31, (2000)

[8]

Toi Y., Hirose S., Identification and prediction of mechanical properties of metals by damage mechanics models, Transactions of the Japan Society of Mechanical Engineers (A), 69, 679, pp. 530-537, (2003)

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