CAJ | 학술논문

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。
이용ANSYS/LS-DYNA현식동역학분석유한원법대Zr55Al10Cu30Ni5괴체비정합금적실온알제소성변형과정진행모의계산,분석료비정합금변형구역내적최대전절응력분포여압하솔적관계。계산득출료은정알제계단불동압하솔하비정합금적응력화응변분포。계산결과표명,알제변형구적최대전절응력수압하솔적증대이증대,병차재최대전절응력초과굴복응력적국부구역비정합금발생료비균균소성변형。모의분석적결과여실험연구결과상부합,종이위진일보연구실온알제변형유도비정합금미관결구변화제공이론의거。
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.