NiTi合金榫接结构微动疲劳研究及数值模拟

胡殿印; 王荣桥; 王晓雪; 樊江; 申秀丽

NiTi合金榫接结构微动疲劳研究及数值模拟

北京航空航天大学能源与动力工程学院, 北京 100191

基金项目: 国家自然科学基金(50575009);新世纪优秀人才计划(NECT-07-0042);航空支撑科技基金(05B51004)

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出版历程
- 收稿日期: 2009-09-11
- 修回日期: 2010-04-12
- 刊出日期: 2010-10-28

Investigation and numerical simulation on fretting fatigue of NiTi

School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 利用NiTi合金的独特性质,提出了将NiTi合金作为压气机榫接结构的材料.通过有限元软件MSC.Marc进行数值模拟,研究在低周、高低周复合载荷作用下NiTi合金抗微动疲劳特性,并提出利用节点的微动综合参数(FFD)值确定危险点,用名义应力法预测构件的微动疲劳寿命的方法.结果表明:提出的微动疲劳寿命预估方法是合理有效的,NiTi形状记忆合金的抗微动疲劳特性明显优于TC11等普通材料.
- NiTi /
- 形状记忆合金 /
- 微动疲劳 /
- 寿命预测 /
- 高低周复合疲劳
Abstract: Based on the unique properties of NiTi shape memory alloys(SMA),a new type of dovetail joints was presented in this paper.Finite element analyses(FEA) were performed by using software MSC.Marc to research the fretting fatigue at low cycle fatigue(LCF) and low and high cycle combine fatigue(L-HCCF).Fretting fatigue life was predicted by using nominal stress method,whereby the initiating position of the crack was determined according to fretting fatigue damage(FFD) value.As a consequence,the method of predicting the fretting fatigue life is reasonable and valid,and fretting fatigue-resistance of NiTi-SMA is much better than traditional materials such as TC11.
- NiTi /
- shape memory alloys(SMA) /
- fretting fatigue /
- life prediction /
- low and high cycle combine fatigue

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