摘要
利用ANSYS/LS-DYNA显式动力学分析有限元法对Zr55Al10Cu30Ni5块体非晶合金的室温轧制塑性变形过程进行模拟计算,分析了非晶合金变形区域内的最大剪切应力分布与压下率的关系。计算得出了稳定轧制阶段不同压下率下非晶合金的应力和应变分布。计算结果表明,轧制变形区的最大剪切应力随压下率的增大而增大,并且在最大剪切应力超过屈服应力的局部区域非晶合金发生了非均匀塑性变形。模拟分析的结果与实验研究结果相符合,从而为进一步研究室温轧制变形诱导非晶合金微观结构变化提供理论依据。
The rolling deformation process of a Zr55Al10Cu30Ni5 bulk metallic glass（BMG） at room temperature is simulated by using dynamic explicit FEM ANSYS/LS-DYNA. The relationship between the maximum shear stress and the rolling reduction in deformation regions is investigated. The distribution of the stress and strain under differ- ent rolling reduction is obtained. The results show that the maximum shear stress during rolling deformation region increases with the increase of the rolling reduction, and that the inhomogeneous plastic deformation occurs in the re- gion with the maximum shear stress larger than the yield stress. The simulated results agree with the previous exper- imental results, which helps to understand microstructure evolution induced by plastic deformation in a BMG at room temperature.
出处
《太原科技大学学报》
2012年第4期311-316,共6页
Journal of Taiyuan University of Science and Technology
基金
国家自然科学基金(50804032)
山西省青年科学基金(2011021020-1)
太原科技大学博士启动基金(20092012)
关键词
块体非晶合金
塑性变形
有限元法
数值模拟
bulk metallic glasses, plastic deformation, finite element method （ FEM）, numerical simulation
