平面应变条件下粘塑性板材气压成形过程的数值模拟方法

在作者过去的工作和有关文献资料的基础上，本文提出了一种平面应变条件下粘塑性板材气压成形过程的数值模拟方法。这种方法可以模拟压力恒定的过程，也可确定保证成形过程中应变速率恒定的最佳加压规律。用本文提出的方法对某些成形过程进行数值模拟的结果，与文献资料中提供的实验数据基本一致。本文所提供的研究结果对实施有关工艺有指导意义。

A NUMERICAL METHOD FOR SIMULATION OF PRESSURE FORMING OF VISCO-PLASTIC SHEET METAL UNDER PLANE STRAIN CONDITION

In this paper a numerical method for simulating the pressure forming of visco-plastic sheet metal under plane strain condition was presented based on the previous work of the authors’ and the related literature. The proposed method is not only able to simulate the processes under constant pressure but also to determine the optimal loading pattern in order to keep the strain rate approximately unchanged during the processes. The results obtained by applying the proposed method to some processes were consistent with the data found in the literature. The achievements of this study may serve as a guide to define the process parameters for the relevant processes.