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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers. Part L, Journal of Materials: Design and Application >Forming limit diagram of tubular hydroformed parts considering the through-thickness compressive normal stress
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Forming limit diagram of tubular hydroformed parts considering the through-thickness compressive normal stress

机译：考虑全厚度压缩法向应力的管状液压成形件成形极限图

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摘要

In this study, the effect of a compressive normal stress has been considered in the determination of forming limit diagrams and forming limit stress diagrams to predict neck initiation failure in tube hydroforming of T-shaped parts. Computation of the forming limit diagrams and FLSDs is based on the generalized Marciniak and Kuczynski method to consider the existence of through-thickness compressive normal stress. The proposed forming limit diagrams and FLSDs were used in conjunction with ABAQUS/EXPLICIT finite element simulations to predict the onset of necking in tube hydroforming of T-shaped part. The amount of calibration pressure and axial feeding required to produce an acceptable part in finite element method was compared to published experimental data, and a satisfactory agreement between the FEM and test results has been achieved. Therefore, the present approach can be used as a reliable criterion to design tube hydroforming processes and reduce the number of costly trials.
机译：在这项研究中，在确定成形极限图和成形极限应力图时已考虑了压缩法向应力的影响，以预测T形零件的管液压成形中的颈部起始破坏。成形极限图和FLSD的计算基于广义的Marciniak和Kuczynski方法，以考虑厚度方向的压缩法向应力的存在。拟议的成形极限图和FLSD与ABAQUS / EXPLICIT有限元模拟结合使用，以预测T形零件管液压成形中颈缩的发生。将有限元法中生产合格零件所需的校准压力和轴向进给量与已公开的实验数据进行了比较，并且在有限元法和测试结果之间达成了令人满意的协议。因此，本方法可以用作设计管液压成型工艺并减少昂贵试验次数的可靠标准。

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