| 基于有限元仿真的左半边成形极限图建立方法 |
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| 引用本文： | 王东,王辉. 基于有限元仿真的左半边成形极限图建立方法[J]. 机械制造与自动化, 2005, 34(3): 74-76 |
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| 作者姓名： | 王东 王辉 |
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| 作者单位： | 南京航空航天大学,机电学院,江苏,南京,210016;南京航空航天大学,机电学院,江苏,南京,210016 |
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| 摘 要： | 有限元仿真中，凸模与板料接触力出现峰值的时刻，板料上变薄量最大单元的邻近单元应变即是材料的缩颈极限应变，通过改变试件形状及尺寸就可以得到在不同应变状态下的缩颈极限应变。把这些极限应变点在二维应变空间里连成曲线，即为用有限元仿真方法得到的材料成形极限图(forruing limits diagram，简称为FLD)。用该方法得到的FLD与按照GB／T 15825．8—1995金属薄板成形性能与试验方法：成形极限图(FLD)试验利用半球形凸模拉伸试件测得的材料FLD符合程度良好。
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| 关 键 词： | 板料成形 成形极限图 HILL集中失稳理论 有限元仿真 |
| 文章编号： | 1671-5276(2005)03-0074-03 |
A New Method to Predict the Left Side of the Forming Limit Diagram Based on the Finite Element Method |
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| WANG Dong,WANG Hui. A New Method to Predict the Left Side of the Forming Limit Diagram Based on the Finite Element Method[J]. Machine Building & Automation, 2005, 34(3): 74-76 |
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| Authors: | WANG Dong WANG Hui |
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| Abstract: | In the finite element simulation, when the pressure between the punch and blank rise to peak, strain of the thinnest element in the blank is the necking limit . Different rate of forming limit strain can be got from different size and shape of specimen. Plot all the limit point in the diagram and connect them to a curve then the forming limit diagram can be gotten. The forming limit diagram of 08AL got in this way is good tallied with the experimental forming limit diagram. |
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| Keywords: | sheet metal forming forming limit diagram(FLD) HILL localized necking theory finite element method |
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