通过拉伸试验获得T5热处理态6 N01铝合金中厚板的拉伸性能和应力-应变曲线,在此基础上采用ANSYS-LSDYNA有限元软件对其三点弯曲变形行为进行了数值模拟,并进行了试验验证.结果表明:不同厚度铝合金板的拉伸性能不同,且与厚度的关联性不强;三点弯曲过程中不同节点位置的应力三轴度变化不大,模拟得到的弯曲极限角在150°到154°之间,与试验结果符合;用所选的材料模型和基于应力三轴度得到的失效应变准则可以模拟铝合金中厚板的弯曲行为.
The tensile properties and stress-strain curves of 6N01 aluminum alloy plate with medium thickness after T5 heat treatment were obtained by the tensile experiments.On this basis the three-point bending deformation behavior of these plates was simulated with the dynamics analysis software ANSYS-LSDYNA and verified by the experiments.The results show that the tensile properties of the aluminum alloy plates with various thicknesses were different and the correlations between tensile properties and thicknesses were not strong.The stress triaxialities at different node positions changed very little during three-point bending.The limit bending angles by simulation were between 150°and 154°,which were consistent with the experimental results.The selected material model and failure strain criterion obtained on the basis of stress triaxialities can simulate the bending behavior of the aluminum alloy plate with medium thickness.
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