材料
Online ISSN : 1880-7488
Print ISSN : 0514-5163
ISSN-L : 0514-5163
論文
2軸応力下における疲労強度評価手法の検討
加藤 孝憲山本 三幸山村 佳成
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ジャーナル フリー

2005 年 54 巻 12 号 p. 1275-1280

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The practical stresses at the critical point of structures or components are often in multiaxial stress states due to the complexity of shapes and external loads. So, in order to evaluate the fatigue strength accurately, we must use an appropriate method considering the multiaxial stress state. In this report, we focused on railway wheel plates being in biaxial stress states by external loads. FEM analyses and uniaxial/biaxial fatigue tests of a wheel steel were carried out. Then we investigated applicability of various multiaxial fatigue strength evaluation methods. As a result, fatigue limits evaluated by uniaxial stresses in biaxial fatigue tests were different from those in uniaxial fatigue tests. And it was clarified that considering a critical plane and crack initiating direction, fatigue limits in biaxial fatigue tests were evaluated accurately by a method using the octahedral share stress.

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© 2005 日本材料学会
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