Outflow characteristics of a pressure medium during sheet hydroforming and its finite element modeling

点击翻译按钮获取中文摘要

Sheet hydroforming is a deep-drawing process in which hydraulic pressure is employed instead of a female die, and is drawing a lot of attention in various industries. In this study, the outflow characteristics of a pressure medium during sheet hydroforming and their numerical modeling that can be utilized in finite element simulations of sheet hydroforming processes were examined. We proposed a numerical model to predict the critical outflow pressure of a pressure medium at the initial stage of the process. We also revealed that, after the critical outflow pressure is reached, the hydraulic pressure changes largely with the sheet deformation, suggesting that such a change in the hydraulic pressure should be taken into consideration to conduct accurate numerical simulations.