Blank Design and Strain Estimates for Sheet Metal Forming Processes by a Finite Element Inverse Approach with Initial Guess of Linear Deformation
Blank Design and Strain Estimates for Sheet Metal Forming Processes by a Finite Element Inverse Approach with Initial Guess of Linear Deformation
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DOI：
10.1016/s0924-0136(98)00034-x
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发表时间：
1998-10
影响因子：
6.3
通讯作者：
Chung-ho Lee;H. Huh
中科院分区：
文献类型：
--
作者：
Chung-ho Lee;H. Huh
介绍了一种新的有限元方法，用于直接预测板料成形过程中坯料形状和最终形状的应变分布。该方法涉及有限元的几何协调、塑性变形理论、约束下塑性功的最小化和适当的初始猜测。将所开发的算法应用于圆柱杯形、方杯形和油底壳形的拉伸，通过对每个问题给出比较准确的数值结果来验证算法的有效性。该算法的快速计算可以方便地确定钣金成形工艺设计的各种工艺变量。
A new finite element approach is introduced for direct prediction of blank shapes and strain distributions from desired final shapes in sheet metal forming. The approach deals with the geometric compatibility of finite elements, plastic deformation theory, minimization of plastic work with constraints and a proper initial guess. The algorithm developed is applied to cylindrical cup drawing, square cup drawing and oil pan drawing in order to confirm its validity by demonstrating reasonably accurate numerical results for each problem. Rapid calculation with this algorithm enables easy determination of various process variables for design of a sheet metal forming process.