Analysis of Strain Non-uniformity Index (SNI) for DifferentGeometries of Drawn Sheet Metal Parts

10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes

Jadhav, Sandip^1 ; Tekale, Ratneshwar^1 ; Date, Prashant P.^1

Department of Mechanical Engineering, Indian Institute of Technology, Bombay Powai, Mumbai

400 076, India^1

关键词: Component shape;    Different geometry;    Different shapes;    Failure prediction;    Forming limit diagrams;    Non-uniformities;    Nonuniformity;    Sheet metal parts;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032098/pdf
DOI  :  10.1088/1742-6596/734/3/032098

来源: IOP

【 摘 要 】

This paper explores the effect of the part geometry on the variation of the Strain NonUniformity Index (SNI) at failure in shapes drawn from a single material. Forming of different shapes, namely, a square cup, an equibiaxially stretched sample was performed experimentally as well as simulated using AUTOFORM 5.2 Plus software. Failure predictions were made using the SNI based methodology and the FLD, and compared with experimental outcomes. Forming of the cross draw (FTF benchmark), was simulated and corresponding critical SNI was established based on the failure predicted with reference to the FLD. The SNI values so obtained are discussed in light of different component shapes and draw depths during forming of various geometries.