was adopted in order to consider the nonlocal friction effect of the asperities on the stress distribution about superplastic drawing of a wide strip through a tapered die.
研究金属材料表面微凸结构对模具与工件接触区域上的非局部摩擦效应,在楔形模宽条料超塑性拉拔加工问题中,首次采用Oden等提出的非局部摩擦定律代替经典的库仑摩擦定律,利用主应力法或工程法建立了相应问题的积微分形式的力平衡方程。