5005铝合金分流模挤压过程有限元模拟

采用DEFORM-3D有限元商业软件,利用焊合面重构技术实现了空心型材分流组合模挤压过程模拟,获取了挤压过程中的材料流动行为与流动速度场的规律,结合型材挤出时模拟的应力场和应变场的分布,研究型材挤压的晶粒分布规律并其成因。结果表明:挤压型材的横截面上的应力应变分布与实际晶粒尺寸分布有对应关系,型材挤压成形过程中应力应变集中分布是造成型材边部晶粒尺寸比中心部细小,拐角区域晶粒比直边区域细小的原因。

Finite Element Simulation on Porthole Die Extruding Process of 5005 Aluminum

Using a mesh-reconstruction technology of welding-plane,the porthole die extrusion process of an hollow profile was successfully simulated based on software DEFORM-3D.The metal flow behaviors,velocity distribution regularities were revealed.Combining with the effective stress and strain on the profile,the distribution of grain size on the profile and its causes were discussed.The result shows the stress and strain distribution of the extrusion profile has certain corresponding relation with the grain size distribution,in other words,finer grain size at the comer area and inner part of the hollow profile result from the concentration of the stress and strain during the extruding.