1420铝锂合金特深模锻件反挤成形过程的热力耦合有限元分析

Coupled Thermo -Mechanical FEM Analysis of Especial Long Forging during Inverted Extrusion

摘要:

利用刚粘塑性有限元方法，对1420铝锂合金特深模锻件反挤成形过程进行了热力耦合FEM分析，获得了1420铝锂合金反挤成形时载荷与位移的关系以及工件上的内应力、应变、应变速率和温度的分布信息。所得结果对工艺制度的制定和模具设计都具有指导意义。

关键词:铝锂合金 本构关系 刚粘塑性有限元法 热力耦合分析

Abstract:

By considering the coupled thermo -mechanical relations between temperature and deforming,a numerical sim ulation of the special long forging for 1420Al -Li alloy dur ing inverted extrusion was done by using rigid visco-plastic finite elem ent method in this paper.The relations between total load and the displacement,the distribution of s tress,strain,temperature and stra in rates during forging,which can provide useful information for the p rocess design,were gained.

Key words:Al-Li alloy,constitutive relation ship,coupled thermo-mechanical analysis,rigid visco-plastic finite element method,