用有限元模拟方法研究无摩擦条件下不同外角Ψ(0,30,60,120°)对高纯铝60°内角等通道转角挤压变形的影响.结果表明:随着Ψ角增加,拐角缝隙减小而出口通道上部缝隙增大,与此同时.更大的Ψ角增加了试样前端向上弯曲的程度,导致出口通道底部缝隙增大;Ψ角变化对挤压稳态区上部的等效塑性应变影响较小,但对下部应变影响很大.挤压载荷随Ψ角增大而显著降低.
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