EXPERIMENTAL AND NUMERICAL INVESTIGATION OF FORMING LIMITS IN INCREMENTAL FORMING OF A CONICAL CUP

机译：锥形杯渐进成形中成形极限的实验和数值研究

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Accurate prediction of forming limits is critical to process planning and part design. It has been found in literature that forming limit curves (FLC) generated from incremental forming (IF) processes greatly exceed the traditional forming limit curves obtained from sheet metal stamping. In this paper, a ductile fracture criterion is introduced in an effort to predict the forming limit in an incremental forming process. Based on calculated stress/strain values from the finite element simulation, the fracture initiation site and the maximum forming height of a conical cup are predicted using the ductile fracture criterion. The numerical results are compared with our experimental results and the strain-based forming limits found in literature. It is concluded that the approach has some merits, however, is not entirely satisfactory. Discussions on the causes of the discrepancy are provided.

机译：准确预测成形极限对工艺规划和零件设计至关重要。在文献中已经发现，由增量成形（IF）过程生成的成形极限曲线（FLC）大大超过了从钣金冲压获得的传统成形极限曲线。在本文中，引入了韧性断裂准则，以预测增量成形过程中的成形极限。基于有限元模拟计算出的应力/应变值，使用延性断裂准则预测圆锥形杯的断裂起始部位和最大成形高度。将数值结果与我们的实验结果以及文献中基于应变的成形极限进行了比较。结论是该方法具有某些优点，但是并不完全令人满意。提供了有关差异原因的讨论。

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来源
《Transactions of the North American Manufacturing Research Institution of SME》|2008年|389-396|共8页
会议地点 Monterrey(MX);Monterrey(MX)
作者
Y. Huang; J. Cao; J. Ziegert; K.S. Smith; B. Woody; M.Li;
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作者单位

Department of Mechanical Engineering Northwestern University Evanston, Illinois;

Department of Mechanical Engineering Northwestern University Evanston, Illinois;

Department of Mechanical Engineering Clemson University Clemson, South Carolina;

Department of Mechanical Engineering University of North Carolina at Charlotte Charlotte, North Carolina;

Department of Mechanical Engineering University of North Carolina at Charlotte Charlotte, North Carolina;

Alcoa Technical Center Pittsburgh, Pennsylvania;

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原文格式 PDF
正文语种 eng
中图分类
关键词
single point incremental forming (SPIF); fracture criterion; forming limit;

机译：单点增量成型（SPIF）；断裂准则成形极限;

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2. Deciphering the deformation mechanism in single point incremental forming: experimental and numerical investigation [J] . Yazar K. U., Mishra Sumeet, Narasimhan K., The International Journal of Advanced Manufacturing Technology . 2019,第9a12期

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4. EXPERIMENTAL AND NUMERICAL INVESTIGATION OF FORMING LIMITS IN INCREMENTAL FORMING OF A CONICAL CUP [C] . Y. Huang, J. Cao, K.S. Smith North American Manufacturing Research Conference . 2008

机译：锥形杯增量成形中形成限制的实验性和数值研究
5. Single point incremental forming of aluminum sheet metal: The development of maximum forming angle forming limits, measured strains, surface roughness and dimensional accuracy. [D] . Ham, Marnie Elizabeth Jean. 2007

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EXPERIMENTAL AND NUMERICAL INVESTIGATION OF FORMING LIMITS IN INCREMENTAL FORMING OF A CONICAL CUP

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