等效结构应力法在高强钢疲劳寿命预测中的应用

邹艳妮; 李耀; 罗东

doi:10.13433/j.cnki.1003-8728.2015.0830

等效结构应力法在高强钢疲劳寿命预测中的应用

doi: 10.13433/j.cnki.1003-8728.2015.0830

邹艳妮^1,3,
李耀^2,3,
罗东^2,3

1.
湘潭大学机械工程学院, 湘潭 411105;
2.
中联重科股份有限公司, 长沙 410013;
3.
建设机械关键技术国家重点实验室, 长沙 410013

详细信息

作者简介:
邹艳妮（1987-），硕士研究生，研究方向为工程机械抗疲劳设计，zcjyj0605@163.com

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出版历程
- 收稿日期: 2013-01-10
- 刊出日期: 2015-08-05

Application of Equivalent Stress Method to Fatigue Life Prediction of High-strength Steel

Zou Yanni^1,3,
Li Yao^2,3,
Luo Dong^2,3

1.
College of Mechanical Engineering, Xiangtan University, Xiangtan 411105, China;
2.
Zoomlion Heavy Industry Science and Technology Co., Ltd., Changsha 410013, China;
3.
State Key Laboratory of Key Technologies on Construction Machinery, Changsha 410013, China

摘要

摘要: 利用成组法对某工程机械常用高强钢材料制作成的对接接头的疲劳寿命开展试验研究。采用美国机械工程师协会（ASME）标准中“网格不敏感的结构应力法及主S-N曲线法”对上述接头的疲劳寿命进行预测。研究表明：基于等效结构应力法的高强钢对接接头疲劳寿命预测结果与试验结果存在一定的偏差。依据董平莎提出的主S-N曲线修正表达式，并结合高强钢对接接头试验结果，引入等效结构应力范围（Δss）修正系数，得到适用于900 MPa级高强钢疲劳寿命预测的修正主S-N曲线。
- 高强钢 /
- 对接接头 /
- 等效结构应力法 /
- 疲劳寿命
Abstract: Fatigue life of butt-welded joint for high-strength steel widely used in engineering machinery, was investigated with the group method. Based on the mesh-insensitive structural stress method and main S-N curve method in american society of mechanical engineers(ASME) standard, fatigue life of the butt-welded joint for high-strength steel was predicted. The investigation showed that there exist some errors between the testing results and the prediction results which is based on the equivalent stress method. With the application of the modification master S-N curve formula according to pingsha dong equation, combining with the testing results, the modification factor was applied to the equivalent stress range( ΔSs) to get the modified main S-N curve, which can be applied for the prediction of fatigue life for high-strength steel.
- butt-welded joint /
- equivalent structural stress method /
- fatigue life /
- high-strength steel

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参考文献(12)

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