Bimetal cup hydroforming of Al/St and Cu/St composites: Adaptive finite element analysis and experimental study
Bimetal cup hydroforming of Al/St and Cu/St composites: Adaptive finite element analysis and experimental study
复制标题
DOI：
10.1007/s12206-016-0431-z
复制
发表时间：
2016-05
影响因子：
1.6
通讯作者：
A. Hashemi;M. H. Gollo;S. M. H. Seyedkashi
中科院分区：
文献类型：
--
作者：
A. Hashemi;M. H. Gollo;S. M. H. Seyedkashi
提出了一种适用于圆锥-圆柱形杯形件液压成形工业设计的自适应有限元分析方法。利用ANSYS参数化设计语言，通过自适应有限元分析，得出了理想件和缺陷件的成形情况。研究了压力加载路径、铺层顺序和板厚比等工艺参数对Al/St和Cu/St复合板液压成形的影响。进行了实验测试，以验证自适应有限元结果。在压力路径上的断裂失效发生在坯料和冲头尖端半径之间的接触区域在低压和圆锥形-圆柱形部分的过渡区域在高压。所提出的方法适用于具有不同材料和尺寸的任何圆柱形、圆锥形或圆柱/圆锥形形状。因此，该方法可作为一种实用的设计工具，为工程技术人员和研究人员在液压成形壳体产品的工艺设计工作。
An adaptive Finite element analysis (FEA) was proposed in this paper for the industrial design of bimetal conical-cylindrical cup hydroforming. Forming circumstances for the perfect and imperfect parts were concluded through adaptive FEA using the ANSYS parametric design language. Effective parameters, including pressure loading path, layer placement order, and thickness ratio, were investigated for hydroforming of Al/St and Cu/St composite sheets. Experimental tests were implemented to validate adaptive finite element results. Rupture failure upon the pressure path occurred on the contact area between the blank and punch tip radius at low pressures and on the transition area of the conical-cylindrical portion at high pressures. The proposed method is applicable for any cylindrical, conical, or cylindrical/conical shapes with different materials and dimensions. Therefore, this method is beneficial as a practical design tool for engineers and researchers working in the process design of hydroformed shell products.