Numerical modelling of the gas detonation process of sheet metal forming

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

Patil, Sandeep P.^1 ; Popli, Madhur^1 ; Jenkouk, Vahid^1 ; Markert, Bernd^1

Institute of General Mechanics, RWTH Aachen University, Templergraben 64, Aachen

52062, Germany^1

关键词: Complex geometries;    Detonation pressure;    Dynamic pressures;    Gas detonation;    Material modeling;    Radial strains;    Strain-rate-dependent;    Thickness distributions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032099/pdf
DOI  :  10.1088/1742-6596/734/3/032099

来源: IOP

【 摘 要 】

Gas detonation forming is an unconventional technique, which has the potential to form complex geometries, including sharp angles and undercuts in a very short process time. To date, most of the numerical studies on detonation forming neglect the highly dynamic pressure profile of the detonation obtained from experiments. In the present work, it is emphasised that the consideration of the actual detonation pressure as measured in the experiment is crucial. The thickness distribution and radial strain are studied using a strain-rate dependent Johnson-Cook material model. The obtained results vary significantly with change in loading rate. Moreover, the model is capable of predicting extremely sharp edges.