|About this Abstract
||NUMISHEET 2021: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
||Experimental and Numerical Evaluation of DP600 Fracture Limits
||Yang Song, Iman Sari Sarraf, Daniel Green
|On-Site Speaker (Planned)
The main objective of the present research is to evaluate the performance of the DIC method and the numerical models to determine and predict the fracture strains of DP600 steel sheets subjected to various strain paths. Accordingly, Nakajima tests and hydro-static bulge tests along with 3D-DIC technique were conducted to evaluate the limiting and fracture strains. The fracture strains were experimentally determined assuming plane stain deformation after the onset of necking, using DIC surface strain and in-situ thickness measurement at fracture site. In addition, uniaxial tension tests in quasi-static and dynamic conditions were carried out to calibrate a modified Johnson-Cook hardening function, and the Rousselier and Johnson-Cook damage models. It was shown that the fracture strains predicted by the numerical simulations are in good agreement with the experimental DIC data. Therefore, the proposed DIC method can be effectively used to predict the fracture limit diagrams of sheet metals.
||Definite: At-meeting proceedings