以5052H32铝合金板为研究对象,以有限元数值模拟和基于计算机控制多点变压边力液压压力机的实验为手段,研究随位置变化的压边力对铝合金板成形性能的影响.研究结果表明:合理地控制随位置变化的变压边力可以显著提高铝合金板的成形性能,增加盒形件的拉深深度(最大拉深高度提高约12%);随位置变化的压边力对铝合金成形性能改进的主要原因是减少破裂危险区域壁厚减薄和应变的峰值;采用Barlat 96屈服准则描述铝合金的屈服行为具有较高精度,数值模拟和实验的偏差较小.
参考文献
[1] | Lumin Geng;R. H. Wagoner .Role of plastic anisotropy and its evolution on springback[J].International Journal of Mechanical Sciences,2002(1):123-148. |
[2] | Kim JB.;Yoon JW.;Barlat F.;Yang DY. .The effect of plastic anisotropy on compressive instability in sheet metal forming[J].International Journal of Plasticity,2000(6):649-676. |
[3] | Yoon JW.;Chung K.;Pourboghrat F.;Yang DY.;Barlat F. .Earing predictions based on asymmetric nonquadratic yield function[J].International Journal of Plasticity,2000(9):1075-1104. |
[4] | A. Airod;H. Vandekinderen;J. Barros;R. Colas;Y. Houbaert .Constitutive equations for the room temperature deformation of commercial purity aluminum[J].Journal of Materials Processing Technology,2003(3):398-404. |
[5] | Hallquist J O.LS-DYNAKeywordUser'sManual,Version960[M].Livermore Software Technology Corporation,2001 |
[6] | Barlat F .Asix-componentyieldfunctionsforanisotropicmaterials[J].International Journal of Plasticity,1991,7(07):693-712. |
[7] | Barlat F .Yield function development for aluminum alloy sheets[J].Journal of the Mechanics and Physics of Solids,1991,45:1727-1763. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%