| 引用本文: | 余海燕,沈嘉怡,王友.屈服准则和硬化模型对5052铝板回弹仿真的影响[J].材料科学与工艺,2015,23(3):29-34.DOI:10.11951/j.issn.1005-0299.20150306. |
| YU Haiyan,SHEN Jiayi,WANG You.Influence of yield criterion and hardening model on springback simulation for 5052 aluminum sheet[J].Materials Science and Technology,2015,23(3):29-34.DOI:10.11951/j.issn.1005-0299.20150306. |
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| 摘要: |
| 为选择适合于5052铝合金回弹仿真的材料模型,对LS-Dyna软件中4个材料模型MAT_36、MAT_122、MAT_125和MAT_226所采用的屈服准则和硬化模型进行了分析,采用这4个模型对5052铝板U形件的回弹进行了仿真,对回弹过程中圆角区的应力释放进行了讨论.同时,进行了U形件的回弹试验,并与仿真结果进行了比较.结果表明,4个材料模型中,基于Yoshida-Uemori随动硬化模型和Barlat’89屈服准则的材料模型MAT_226具有最好的回弹预测精度,由各向同性硬化模型和Hill’48屈服准则组合的材料模型MAT_122的回弹预测结果与试验结果的偏差最大.硬化模型对回弹预测精度的影响大于屈服准则的影响. |
| 关键词: 屈服准则 硬化模型 回弹仿真 铝板 冲压成形 |
| DOI：10.11951/j.issn.1005-0299.20150306 |
| 分类号:TG389 |
| 基金项目:国家自然科学基金(51175382)；中央高校基本科研业务费专项资金 (20113169). |
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| Influence of yield criterion and hardening model on springback simulation for 5052 aluminum sheet |
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YU Haiyan, SHEN Jiayi, WANG You
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(School of Automotive Engineering,Tongji University,Shanghai 201804,China)
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| Abstract: |
| To select a suitable material model for springback simulation of the 5052 aluminum sheet,the yielding criteria and hardening models used in the four material models,MAT_36, MAT_122, MAT_125 and MAT_226 adopted by LSDYNA software were analyzed. These four material models were used to simulate the springback of a 5052 aluminum U-shaped part.The stress relief during springback at the corners and walls of U-shaped part was discussed. Springback experiments of the U-shaped part were performed, and the obtained data were compared tothe simulation ones. The results indicated that among the four material models, the model, MAT_226, that includes the Balart89 criterion and Yoshida-Uemori kinematic hardening model has the highest precision of springback simulation.TheMAT_122modelconsisting ofthe isotropic hardening and Hill’48 yielding criterion gives the lowest precision in springback simulation.Hardening model has greater influence on the precision of springback simulation than the yielding criterion has. |
| Key words: yielding criterion hardening model springback simulation aluminum sheet stamping |
