Material testing of magnesium alloy AZ31B using a finite element polycrystal method based on a rate independent crystal plasticity model
Material testing of magnesium alloy AZ31B using a finite element polycrystal method based on a rate independent crystal plasticity model
复制标题
使用基于速率无关晶体塑性模型的有限元多晶方法对镁合金 AZ31B 进行材料测试
DOI：
10.1088/1757-899x/967/1/012057
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
G. Vago and T. Oya
中科院分区：
文献类型：
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作者：
矢上裕晃;柳下裕也;瀧野日出雄;国部利寿;三浦孝治;清井洋輔;小西貴信;二田光司;日髙詢子;G. Vago and T. Oya
镁及其合金具有高比强度和高比刚度，是一种很有吸引力的轻质结构材料。这就是为什么它们在高性能汽车和航空航天应用中的使用越来越多。然而，由于其高的各向异性和低的塑性，容易导致成形失效，因此对金属成形模拟的精度要求较高。宏观参数的识别是昂贵的，因为需要找到它们的实验，使用多尺度方法允许通过更容易的实验找到模型的参数。采用基于速率无关多晶塑性模型的有限元多晶法对铸造镁合金AZ 31 B进行材料试验。通过试验和误差过程调整模型的参数以更好地拟合实验数据。
Magnesium and its alloys are attractive structural light materials because they have a high spe-cific strength and high specific stiffness. That is why their usage in high performance automotive and aerospace applications has been increased. However, their high anisotropy and low ductility could bring to forming failure, to avoid these a better accuracy for metal forming simulation is re-quired. The identification of macroscopic parameters is expensive due to the experiments needed to find them, the use of multi-scale approach allows to find parameters for the model through easier experiments. A finite element polycrystal method, based on a rate independent polycrystal plasticity model, is implemented in order to perform the material testing of a cast magnesium alloy AZ31B. The parameters of the model are adjusted to better fit the experimental data through a trial and error process.