塑性变形下铝合金板材厚向应变模型的构建和求解（英文）

发布时间：2019-03-12 16:34

【摘要】：建立适合铝合金材料的各向同性线性强化薄板在平面应力状态下塑性变形时厚向应变的求解模型。当加载于薄板的应力分量之比在平面内塑性变形过程中为常数时,薄板的应变分量间呈线性关系,研究发现这一系列不同应力比例和对应的应变比例值构成直线方程,即η-η线。因此,当应力分量间呈恒比例关系加载于薄板时,其厚度方向的应变可以通过η-η线方程快速得到,避免了积分和微分运算。当薄板处于更加复杂的加载状态时,其厚度可以通过提出的迭代优化算法模型得到。研究表明,计算结果与现有理论和有限元仿真结果的相对误差小于0.75%,其精度达到工程应用要求。该模型可用于航空高强铝合金厚板预拉伸工艺分析等实际应用。
[Abstract]:A model for solving thick strain of isotropic linear strengthened thin plate under plane stress condition is established. When the ratio of stress components loaded on thin plates is constant in the process of in-plane plastic deformation, there is a linear relationship between the strain components of thin plates. It is found that this series of different stress ratios and corresponding strain ratios form a linear equation. The 畏-畏 line. Therefore, when the stress components are loaded in a constant proportion on the thin plate, the strain in the thickness direction can be quickly obtained by 畏-畏 line equation, thus avoiding the integral and differential operations. When the thin plate is in a more complex loading state, its thickness can be obtained by the proposed iterative optimization algorithm model. The results show that the relative error between the calculated results and the existing theoretical and finite element simulation results is less than 0.75%, and the accuracy of the calculation results meets the requirements of engineering application. The model can be applied to the pre-drawing process analysis of aviation high-strength aluminum alloy thick plate.
【作者单位】：中南林业科技大学机电工程学院;中南大学机电工程学院;
【基金】：Project(51475483)supported by the National Natural Science Foundation of China Project(2014FJ3002)supported by Science and Technology Project of Hunan Province,China Project supported by Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province,China
【分类号】：TG146.21

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