摘要
使用自制牵引滚动摩擦试验机测试氧化锌晶须(ZnOw)增强尼龙(Polyamide,PA)复合材料的滑移率—牵引力系数特性曲线,采用赫兹理论分析复合材料45钢的接触特性,并根据复合材料的粘弹性模型分析粘弹性对牵引力系数的影响。结果表明,ZnOw/PA复合材料的牵引力系数随滑移率先线性增大,在滑移率为5%～15%范围内,牵引力系数增至最大,然后则随滑移率增加逐渐减小并趋于稳定。牵引滚动特性受ZnOw的质量分数和试验正压力的影响。复合材料的粘弹性特性对复合材料的牵引力系数影响较小。复合材料的牵引力系数主要取决于其与45钢之间的粘着摩擦,牵引力系数符合大滑移率条件下牵引力系数的数学模型。
Traction rolling characteristic of nylon composites reinforced with ZnOw is measured with self-made traction rolling friction tester. The contact behavior between nylon composites and 45 steel is analyzed by using Hertz theory. The effect of viscoelastic properties on coefficient of traction is analyzed on the basis of visco elasticity model of composites. The results show that the coefficients of traction of composites linearly increase with slip ratio and reach to the maximum when slip ratio is between 5% and 15%, and then gradually decrease and tend to leaveling off. The creep characteristic of composites is affected by the content of ZnOw and normal pressure. Visco elasticity of composites had little effect on coefficient of traction. The coefficient of traction is mainly determined by the adhesive friction between composites and 45 steel rollers. The variation of coefficients of traction against slip ratio obeys the traction model with a large slip ratio.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2010年第5期63-67,共5页
Journal of Mechanical Engineering
基金
国家重点基础研究发展计划(973计划
2007CB607605)
国家自然科学基金重点(50535050
50875253)
中国矿业大学校基金(2007A049)资助项目
