Bending deformation behavior of 6061 aluminum alloy sheets after different aging times was investigated using three-point bending tests. The bending deformation was analyzed experimentally and using finite-element (FE) analysis. The results showed that the strength of the material increased with aging time, resulting in a decrease of bending radius and bending thickness in the fillet region, and an increase of the neutral layer offset and springback angle. A strain-hardening exponent n with a power function model was introduced following correlation analysis of the main factors. Regression models of the bending parameters were established based on evaluation of the t-Student relevant parameters. The accuracies of the regression and FE springback models in predicting the springback angle were compared with experimental results. The regression model showed higher accuracy in predicting the springback angle. This modeling method can be extended to predict deformation behavior of aluminum alloy structures and provide a theoretical basis for the design of lightweight automotive structures.

采用三点弯曲试验研究了6061铝合金板在不同时效时间后的弯曲变形行为。对弯曲变形进行了实验分析，并使用了有限元（FE）分析。结果表明，材料的强度随着时效时间的增加而增加，从而导致圆角区域的弯曲半径和弯曲厚度减小，中性层偏移和回弹角增大。应变硬化指数n通过对主要因素的相关分析，引入了幂函数模型。基于对t型学生相关参数的评估，建立了弯曲参数的回归模型。将回归和有限元回弹模型预测回弹角的准确性与实验结果进行了比较。回归模型在预测回弹角方面显示出更高的准确性。这种建模方法可以扩展到预测铝合金结构的变形行为，并为轻型汽车结构的设计提供理论依据。