摘要
利用ADINA有限元分析软件,从宏观和细观两方面研究圆柱体镦粗过程中金属材料表面微凸结构对接触区域上的库仑摩擦和非局部摩擦的影响,得到了接触法向应力随压下量的变化关系,及接触面上法向应力和摩擦应力的分布规律。结果表明,在宏观领域内,传统库仑摩擦模型与非局部摩擦模型没有区别;只有在细观领域(考虑表面微凸时),非局部摩擦效应才显现出来。且这种非局部效应与微凸体分布有关。
The influence of the asperities on Coulomb＇s friction model and non-local friction model in cylinder upsetting process was studied on macro-level and micro-level by using finite element analysis software ADINA.The relation between the height reduction and the contact normal stress and also the distribution of normal stress and friction stress on contact surfaces were found.The results show that there is no difference between the application of non-local friction law and Coulomb friction law on a smooth contact surface.Only when the asperities of the contact surface being considered,the non-local friction effect would appear and is relevant to the distribution of the asperities.
出处
《塑性工程学报》
CAS
CSCD
北大核心
2011年第4期69-73,共5页
Journal of Plasticity Engineering
基金
江西省自然科学基金资助项目(2009GZC0083)
