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In order to solve the problem of difficulty in Computer Aided Engineering (CAE) evaluation of forming failure of small fillet feature line, for a door outer panel with such feature, AutoForm was used to control the material inflow by adjusting the drawbead, and four kinds of door outer panel models with different forming states are obtained. Meanwhile, the forming condition and practical stamping condition with and without thickness stress are analyzed respectively. The results show that the forming limit of small size fillet feature line is reduced due to the influence of thickness stress, and uneven plastic deformation will occur in further forming, so the traditional formability CAE evaluation method is not suitable for small size fillet feature lines. Finally, a CAE method for evaluating the formability of small fillet feature lines combined with slippage is proposed, that is, when the slippage is less than 5mm and the thickness reduction rate and maximum nonlinear failure value meet the requirements, it can be considered that there is no formability risk of small fillet feature lines.
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为解决小尺寸圆角特征线成形失效计算机辅助工程(CAE)评估困难的问题,针对存在该特征的某车型门外板,利用AutoForm,通过调节拉延筋控制材料流入量获得特征线区域存在不同成形状态的4种门外板模型,分别分析了考虑厚向应力和不考虑厚向应力的成形情况和实际冲压情况,结果表明,厚向应力使小尺寸圆角特征线的成形极限降低,进一步成形会发生不均匀的塑性变形,导致传统的成形性CAE评估方法不适用于小尺寸圆角特征线。最后,提出了结合滑移量的小尺寸圆角特征线成形性CAE评估方法,即当滑移量不超过5 mm且减薄率和最大非线性失效值均满足要求时,认为小尺寸圆角特征线不存在成形性风险。
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前门外板拉延有限元模型, figureFileSmall=tjAvDu3aF1tNvJUYlE8uNw==, figureFileBig=9n9QUEoaQjIWB0xVmtttwQ==, tableContent=null), ArticleFig(id=1200407203606811214, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070662162314209, language=EN, label=null, caption=null, figureFileSmall=tW5MXyqyfiz9JxyMpSPedA==, figureFileBig=DNyK4GTvT3+RMXiDfvYaIA==, tableContent=null), ArticleFig(id=1200407203741028944, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070662162314209, language=CN, label=图3, caption=
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实际材料流入量与CAE分析结果, figureFileSmall=3B1HaSOkxRMdaTJnNldbBg==, figureFileBig=UYGbAuMu4qc9UZuWKiOGkA==, tableContent=null), ArticleFig(id=1200407204122710618, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070662162314209, language=EN, label=null, caption=null, figureFileSmall=QDAIlPNJlrM6bQyWY/Olsg==, figureFileBig=LMpY4AmZFS5dNJo5/2ZIrA==, tableContent=null), ArticleFig(id=1200407204235956830, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070662162314209, language=CN, label=图5, caption=
常规拉延方案实际冲压结果, figureFileSmall=QDAIlPNJlrM6bQyWY/Olsg==, figureFileBig=LMpY4AmZFS5dNJo5/2ZIrA==, tableContent=null), ArticleFig(id=1200407204315648611, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070662162314209, language=EN, label=null, caption=null, figureFileSmall=jMVnlDMzRHwWR7Wo1sxGtQ==, figureFileBig=bUSbOefyUqRBs2wHoNIbjg==, tableContent=null), ArticleFig(id=1200407204391146086, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070662162314209, language=CN, label=图6, caption=
不考虑厚向应力时不同方案的CAE分析结果, figureFileSmall=jMVnlDMzRHwWR7Wo1sxGtQ==, figureFileBig=bUSbOefyUqRBs2wHoNIbjg==, tableContent=null), ArticleFig(id=1200407204466643562, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070662162314209, language=EN, label=null, caption=null, figureFileSmall=bQuwi7l3QYIhsGkSYnZ/Rg==, figureFileBig=UHA+7FWGcUsL/HsG+Z4XCQ==, tableContent=null), ArticleFig(id=1200407204571501166, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070662162314209, language=CN, label=图7, caption=
考虑厚向应力时不同方案的CAE分析结果, figureFileSmall=bQuwi7l3QYIhsGkSYnZ/Rg==, figureFileBig=UHA+7FWGcUsL/HsG+Z4XCQ==, tableContent=null), ArticleFig(id=1200407204688941681, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070662162314209, language=EN, label=null, caption=null, figureFileSmall=aDEu2i8S/2abuMwEfXHoYg==, figureFileBig=vIzGqw65qwVsbYS1+rhaDg==, tableContent=null), ArticleFig(id=1200407204793799287, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070662162314209, language=CN, label=图8, caption=
特征线处变形情况, figureFileSmall=aDEu2i8S/2abuMwEfXHoYg==, figureFileBig=vIzGqw65qwVsbYS1+rhaDg==, tableContent=null), ArticleFig(id=1200407204886073973, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070662162314209, language=EN, label=null, caption=null, figureFileSmall=BJ6nncI8KzD7zqnH5hPrPg==, figureFileBig=/O6nB3MBgmb8hP+QovFfUQ==, tableContent=null), ArticleFig(id=1200407204995125882, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070662162314209, language=CN, label=图9, caption=
4种不同方案特征线处的滑移量, figureFileSmall=BJ6nncI8KzD7zqnH5hPrPg==, figureFileBig=/O6nB3MBgmb8hP+QovFfUQ==, tableContent=null), ArticleFig(id=1200407205066429052, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070662162314209, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 测点序号 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| α/(°) | 134 | 135 | 135 | 135 | 135 | 136 | 136 | 137 | 138 |
| R/mm | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.8 | 1.8 |
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前门外板特征线圆角几何尺寸
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| 测点序号 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| α/(°) | 134 | 135 | 135 | 135 | 135 | 136 | 136 | 137 | 138 |
| R/mm | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.8 | 1.8 |
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| 性能参数 | 数值 |
| 屈服应力σ0/MPa | 238.5 |
| 抗拉强度Rm/MPa | 345.6 |
| 平均厚向各项异性系数rm | 1.4 |
| 硬化因子n | 0.2 |
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GX220BD-ZF的力学性能
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| 性能参数 | 数值 |
| 屈服应力σ0/MPa | 238.5 |
| 抗拉强度Rm/MPa | 345.6 |
| 平均厚向各项异性系数rm | 1.4 |
| 硬化因子n | 0.2 |
), ArticleFig(id=1200407205360030347, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070662162314209, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数值 |
| 单元类型 | ESP-11 |
| 最大单元角度/(°) | 16 |
| 最大允许半径穿透值/mm | 0.16 |
| 最小单元尺寸/mm | 0.16 |
| 最大工具体位移/mm | 2.2 |
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网格单元分析参数设置
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| 参数 | 数值 |
| 单元类型 | ESP-11 |
| 最大单元角度/(°) | 16 |
| 最大允许半径穿透值/mm | 0.16 |
| 最小单元尺寸/mm | 0.16 |
| 最大工具体位移/mm | 2.2 |
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| 测点序号 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 方案1 | +Y向 | 17 | 26 | 24 | 21 | 18 | 16 | 15 | 14 | 13 |
| -Y向 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 方案2 | +Y向 | 18 | 26 | 25 | 21 | 19 | 17 | 15 | 14 | 14 |
| -Y向 | 3 | 4 | 5 | 7 | 9 | 10 | 10 | 11 | 11 |
| 方案3 | +Y向 | 20 | 30 | 30 | 27 | 24 | 23 | 21 | 20 | 20 |
| -Y向 | 3 | 4 | 6 | 7 | 8 | 10 | 10 | 11 | 11 |
| 方案4 | +Y向 | 10 | 16 | 14 | 12 | 12 | 12 | 13 | 13 | 13 |
| -Y向 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
), ArticleFig(id=1200407205611688597, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070662162314209, language=CN, label=表4, caption=
CAE仿真分析的材料流入量测量结果 mm
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| 测点序号 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 方案1 | +Y向 | 17 | 26 | 24 | 21 | 18 | 16 | 15 | 14 | 13 |
| -Y向 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 方案2 | +Y向 | 18 | 26 | 25 | 21 | 19 | 17 | 15 | 14 | 14 |
| -Y向 | 3 | 4 | 5 | 7 | 9 | 10 | 10 | 11 | 11 |
| 方案3 | +Y向 | 20 | 30 | 30 | 27 | 24 | 23 | 21 | 20 | 20 |
| -Y向 | 3 | 4 | 6 | 7 | 8 | 10 | 10 | 11 | 11 |
| 方案4 | +Y向 | 10 | 16 | 14 | 12 | 12 | 12 | 13 | 13 | 13 |
| -Y向 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
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| 方案 | 失效情况 | 说明 |
| 1 |  | 特征线局部出现开裂 |
| 2 |  | 无失效 |
| 3 |  | 整条特征线出现开裂 |
| 4 |  | 整条特征线出现开裂 |
), ArticleFig(id=1200407205800432282, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070662162314209, language=CN, label=表5, caption=
4种方案的冲压调试结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 方案 | 失效情况 | 说明 |
| 1 |  | 特征线局部出现开裂 |
| 2 |  | 无失效 |
| 3 |  | 整条特征线出现开裂 |
| 4 |  | 整条特征线出现开裂 |
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