针对油膜轴承巴氏合金SnSb 11Cu6工作过程中发生的蠕变,设计了SnSb11Cu6蠕变试验方法并对其进行了蠕变试验,分析了应力、温度、时间、应变和应变率之间的关系,获得了SnSb11Cu6的蠕变力学性能,同时基于试验数据对4种蠕变模型进行了对比分析,建立了基于McVetty公式和Dorn公式的SnSb 11Cu6蠕变模型,其相对误差仅为0.97％,应用ANSYS对蠕变试件进行了数值模拟,在稳态蠕变阶段模拟值与理论计算值的相对误差仅为0.77％.确定了所建立的蠕变模型用于描述SnSb11Cu6蠕变特征具有较高的精度,可为油膜轴承巴氏合金SnSb11Cu6蠕变寿命的预测提供理论与试验支持.
According to the creep deformation of Babbitt SnSb 11Cu6 of oil-film bearing in operation,a creep test method of SnSb11Cu6 was designed and the creep test of SnSbl 1Cu6 was carried out.The relationships of stress temperature,time,strain and strain rate were analyzed,and then the creep mechanical properties of SnSb 11Cu6 were obtained.Meanwhile,four kinds of creep models were compared based on the experimental data.A creep model of SnSbl 1Cu6 was established based on McVetty formula and Dorn formula,whose relative error is only 0.97％.The creep specimen was simulated by ANSYS,and the relative error between the simulation value and the calculated value of SnSbl 1Cu6 creep model in the steady state creep stage is only 0.77％.It is concluded that the creep model of SnSb11Cu6 has high accuracy on describing its creep characteristics and can provide theoretical and experimental supports for life prediction of Babbitt SnSb11Cu6 of oil-film bearing bushing.
参考文献
| [1] | 王建梅,黄庆学,杨世春,丁光正,申福昌.轧机油膜轴承润滑理论的回顾与展望[J].润滑与密封,2006(02):177-180. |
| [2] | 闫焉服,刘建萍,史耀武,荣莉.63Sn37Pb钎焊接头稳态蠕变本构方程的建立[J].焊接学报,2005(04):29-32,36. |
| [3] | 柳晖,轩福贞.蠕变寿命外推的能量模型[J].机械强度,2011(03):428-431. |
| [4] | Jad Jelwan;Mahiuddin Chowdhury;Garth Pearce .Design for creep: A critical examination of some methods[J].Engineering failure analysis,2013(1):350-372. |
| [5] | 白晶,孙扬善,薛烽,晏井利,强婧,陶卫建.高性能碱土耐热镁合金的显微组织和蠕变性能[J].北京科技大学学报,2007(02):198-204. |
| [6] | 湛利华,李杰,黄明辉,李炎光.2524铝合金的蠕变时效行为[J].中国有色金属学报,2013(02):320-326. |
| [7] | 张华锋,郑剑平,杨启法,张征,李鑫,赵俊,胡忠武,饶立强.铌含量对Mo-Nb合金单晶高温抗内压蠕变性能的影响[J].稀有金属材料与工程,2013(04):751-755. |
| [8] | 田素贵,谢君,周晓明,钱本江,伦建伟,于莉丽,汪武祥.FGH95镍基合金的蠕变行为及影响因素[J].稀有金属材料与工程,2011(05):807-812. |
| [9] | 张尧成,曾明,郭萍,廖春丽,沈保罗.AE42合金的抗压入蠕变性能[J].中国有色金属学报,2009(07):1169-1175. |
| [10] | 张诗昌,宗钦,胡衍生,程晓茹.高温低应力下AZ31镁合金的蠕变性能及蠕变机理[J].机械工程学报,2009(03):291-295. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%