Determination of the forming limit diagrams by using the fem and experimental method

This paper presents the implementation of forming limit diagrams (FLDs) by the FEM and experimental method for sheet metals, which are vastly used in automobile industry. Several different methods were employed to measure the strains of the deformed sheet metals in experimental method. The uncertainty of each method was determined and the most efficient and economic way was introduced. Because of complexity and expensiveness of the experimental method, simulating of the deep drawing test to obtain the FLD has also been implemented by FEM. The FEM results show excellent agreement with experimental data in present work. Hence, the FEM can be a suitable and reliable method to obtain a FLD.