摘要
依据成形中热与力的相互影响,建立了用于模拟粉末烧结材料锻造过程的可压缩刚粘塑性热力耦合有限元列式。对材料为AL6061的粉末烧结体坯料在不同条件下镦粗成形过程进行热力耦合模拟,得到成形过程中的变形、温度以及相对密度的分布状况。热力耦合技术的运用,可以更加精确地描述粉末锻造成形过程,这对确定工艺参数及提高产品质量有重要意义。
According to the interaction of thermal and mechanical effects during powder forging process, the coupled thermo-mechanical equations for numerical simulation were studied with the compressible rigid-viscoplastic finite element method. Free upsetting process was selected to investigate the deformation behavior of the sintered powder metal of Al 6061. Through the numeri- cal simulation, the distributions of strain, density and temperature are investigated under the different working conditions. The adoption of coupled thermo-mechanical technique enables a more accurate description of deformation, and this is very important to properly determine the technology parameter and increase the quality of the products.
出处
《塑性工程学报》
EI
CAS
CSCD
北大核心
2005年第6期11-16,共6页
Journal of Plasticity Engineering
基金
教育部博士学科点专项基金资助项目(040310B2)。
关键词
粉末烧结体
镦粗成形
有限元法
热力耦合
sintered powder
upsetting process
FEM
thermo-mechanical coupling
