【摘要】 应用商用有限元软件ANSYS/LS-DYNA,对板料的双向加压液压胀形过程进行了数值模拟。并利用韧性断裂准则作为胀形高度极限的判断依据,将模拟得到的必要数据代入到准则中。对两种材料、不同初始液体压力条件下的模拟结果表明,随着初始液体压力的升高,胀形的极限高度也相应的增加,当初始压力与板料的强度相当时,极限高度提高的更明显。更多还原

【Abstract】 The double sides pressurized hydroforming process of metal sheet is numerically simulated by applying the commercial FEM software ANSYS/LS-DYNA.Using the ductile fracture criterion as the reference for judging the limit height of the process to put the necessary simulation results into the criterion.The simulation results of two materials under different initial liquid pressure represent that the limit height of the hydroforming could be boosted by increasing the initial liquid pressure,and the limit height could be boosted obviously when the initial pressure and the strength of the sheet are in the same rank.更多还原