Development of novel forming limit curve testing method

International Deep Drawing Research Group 37th Annual Conference

Deng, Z.^1 ; McGuire, J.P.^1

Aleris North American Automotive Innovation Center, Madison Heights

MI

48071, United States^1

关键词: Deformation modes;    Forming limit curve;    Linear strains;    Lubrication effect;    Metal materials;    Sheet metal formabilities;    Strain paths;    Testing method;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/418/1/012049/pdf
DOI  :  10.1088/1757-899X/418/1/012049

来源: IOP

【 摘 要 】

A new concept of the forming limit curve testing method has been developed for evaluating sheet metal formability. This new method complies with the current ISO 12004-2 standard, and has been verified by the numerical analysis in terms of specimen deformation, strain path characterization and lubrication effect. It combines the advantages from both the standardized Marciniak and Nakajima tests, deforming the sheet metal materials under a complicated deformation mode following the linear strain path without using a carry blank. By comparing the simulation results with the experimental measurements, it is proven that this testing method works with the thinner and thicker sheet metals for a variety of blank geometries.