巴氏合金SnSb11Cu6蠕变力学性能研究

Creep Mechanical Properties of Babbitt SnSb11Cu6

摘要:

针对油膜轴承巴氏合金SnSb11Cu6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SnSb11Cu6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

Abstract:

According to the creep deformation of Babbitt SnSb11Cu6 of oil-film bearing in operation, a creep test method of SnSb11Cu6 was designed and the creep test of SnSb11Cu6 was carried out. The relationships of stress temperature, time, strain and strain rate were analyzed, and then the creep mechanical properties of SnSb11Cu6 were obtained. Meanwhile, four kinds of creep models were compared based on the experimental data. A creep model of SnSb11Cu6 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 SnSb11Cu6 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