|
摘要：
|
|
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。在简化的情况下,采用摄动法求得所论问题的近似解,并分析了影响应力的非局部效应的相关因素。
|
|
The nonlocal friction law proposed by Oden,et al.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.The mechanical equilibrium equation with the integral-differential form was obtained by using the engineering method or slab method,and solved approximately by using the perturbation method.The stresses based on nonlocal friction law were obtained,and the factors which affect the nonlocal friction effect were analyzed.
|
|
基金项目：
|
|
教育部博士点基金资助项目(20050403002)
|
|
作者简介：
|
|
|
|
参考文献：
|
[1]冯登泰.接触力学的发展概况[J].力学进展,1987,19(3):339-341.
[2]Oden J T.Pire E B.Nonlocal and nonlinear friction laws andvariational principles for contact problems in elasticity[J].J.of Appl.Mech.ASME,1983,50:67-76.
[3]Duvaut G.Loi DE.Frottement non locale[J].Journal deMecanique et Appliquee,1982,Special issue:73-78.
[4]郭良,扶名福.采用非局部摩擦定律处理平面镦粗问题及其近似解[J].塑性工程学报,2001,8(1):59-61.
[5]扶名福.非局部摩擦在塑性加工中的应用[J].力学季刊,2002,22(3):112-115.
[6]闫小青,扶名福.非局部摩擦在几种塑性成形工艺中的应用[J].应用数学和力学,2005,26(11):1287-1292.
[7]蔡改贫,翁海珊.振动拉拔的非局部摩擦问题的近似求解及表面效应初探[J].机械工程学报,2006,42(8):90-93.
[8]Tang S.Mechanics of Superplasticity[M].New York:Robert E Krieger Publish Company,1979.
[9]李跃宇,舒小平,刘树春,等.超塑性材料的镦粗变形力的研究[J].锻压技术,2005,30(5):9-12.
[10]奈弗A H,王辅俊等译.摄动方法[M].上海:上海科技出版社,1984.
|
|
服务与反馈：
|
|
【文章下载】【加入收藏】
|
|
|
|
