蛇形轧制对Al-Mg-Si合金板材剪切变形及织构影响的模拟
发布时间：2019-02-13 15:20
【摘要】：通过有限元模拟,探究蛇形轧制过程中异速比、错位量和压下量对AA6016铝合金板材曲率的影响,并比较对称轧制与蛇形轧制板材的厚向应变分布及轧制过程中的应变演变规律。研究结果表明:在一定异速比范围内(1.00~1.20),异速比越大,轧板越向慢辊弯曲;错位会引起轧板向上辊弯曲;压下量越大,轧板越弯向慢辊,但上述结论在有错位量、异速比小于1.05时并不成立。与对称轧制过程相比,蛇形轧制过程中板材接触剪切应力和应变呈对称分布,整个轧制过程表现出上表层正应变较大、下表层正应变较小,切应变整体向上平移;等效应变则变化不大。蛇形轧制在板材整个厚度方向引入了剪切应变,因此,能够获得均匀的近似111//ND剪切织构。
[Abstract]:By means of finite element simulation, the effects of the ratio of different velocities, dislocation and reduction on the curvature of AA6016 aluminum alloy sheet in the process of snake-shaped rolling are studied. The distribution of the thick strain and the strain evolution in the rolling process of symmetrical rolling and snake rolling are compared. The results show that: in a certain range of different speed ratio (1.00 ~ 1.20), the higher the ratio of different speed, the more slowly roll bending, and the misposition will cause the rolling plate to bend upward. The larger the reduction, the more curved the rolling plate is towards the slow roll, but the above conclusion is not true when the displacement and the ratio of different speed are less than 1.05. Compared with the symmetrical rolling process, the contact shear stress and strain of sheet metal show symmetrical distribution in the course of snake-like rolling. The whole rolling process shows that the positive strain of the upper surface is larger, the positive strain of the lower surface is smaller, and the whole shear strain is shifted upward. The equivalent strain does not change much. The shear strain is introduced into the whole thickness direction of the plate by snake-like rolling, so a uniform approximate 111//ND shearing texture can be obtained.
【作者单位】： 中南大学材料科学与工程学院;湖南科技大学机电工程学院;
【基金】：国家自然科学基金资助项目(51474240,51475162)~~
【分类号】：TG146.21;TG339
，
本文编号：2421684
[Abstract]:By means of finite element simulation, the effects of the ratio of different velocities, dislocation and reduction on the curvature of AA6016 aluminum alloy sheet in the process of snake-shaped rolling are studied. The distribution of the thick strain and the strain evolution in the rolling process of symmetrical rolling and snake rolling are compared. The results show that: in a certain range of different speed ratio (1.00 ~ 1.20), the higher the ratio of different speed, the more slowly roll bending, and the misposition will cause the rolling plate to bend upward. The larger the reduction, the more curved the rolling plate is towards the slow roll, but the above conclusion is not true when the displacement and the ratio of different speed are less than 1.05. Compared with the symmetrical rolling process, the contact shear stress and strain of sheet metal show symmetrical distribution in the course of snake-like rolling. The whole rolling process shows that the positive strain of the upper surface is larger, the positive strain of the lower surface is smaller, and the whole shear strain is shifted upward. The equivalent strain does not change much. The shear strain is introduced into the whole thickness direction of the plate by snake-like rolling, so a uniform approximate 111//ND shearing texture can be obtained.
【作者单位】： 中南大学材料科学与工程学院;湖南科技大学机电工程学院;
【基金】：国家自然科学基金资助项目(51474240,51475162)~~
【分类号】：TG146.21;TG339
，
本文编号：2421684
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