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采用ANSYS软件建立了等通道转角挤压有限元模型,对试样与模具接触面间不同摩擦系数条件下的等通道转角挤压过程进行了模拟,获得了摩擦应力、试样与模具内部应力的变化及分布规律。以AZ31镁合金为试验对象,进行了等通道转角挤压试验,将模拟分析结果与试验结果进行了对比。结果表明,等通道转角挤压过程中,试样与模具间的摩擦系数对摩擦应力、试样变形及弹性应力均有重要影响。随着试样与模具接触面摩擦系数的增加,试样与模具表面会产生较大摩擦应力,导致试样与模具内应力分布不均匀。摩擦应力、材料内部应力大小及分布区域随着摩擦系数的增加而增加。
ANSYS software was used to establish isotropic channel corner squeeze finite element model, the contact angle between the specimen and the mold surface was simulated under the condition of different friction coefficients, and the frictional stress, the internal stress of the specimen and the mold Changes and distribution. Taking AZ31 magnesium alloy as the test object, the equal-channel corner squeeze test was carried out, and the simulation analysis results were compared with the test results. The results show that the friction coefficient between the sample and the die has important influence on the friction stress, sample deformation and elastic stress during the process of equal channel corner extrusion. With the increase of the friction coefficient between the specimen and the mold contact surface, the specimen and the mold surface will have a greater frictional stress, resulting in uneven stress distribution in the specimen and the mold. Frictional stress, material internal stress size and distribution area with the friction coefficient increases.