A new analytical model for force prediction in incremental sheet forming
A new analytical model for force prediction in incremental sheet forming
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DOI：
10.1016/j.jmatprotec.2023.118037
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发表时间：
2023-05
影响因子：
6.3
通讯作者：
Hui Zhu;H. Ou
中科院分区：
文献类型：
--
作者：
Hui Zhu;H. Ou
本文提出了一种新的增量板料成形全过程成形力预测分析模型。对接触区域、厚度分布和应变分量进行建模，作为垂直和水平力预测的基础。在ISF力史建模中考虑了局部接触行为和材料变形的影响，以及整体弯曲行为、变形模式变化和接触条件的影响。基于平面应变和双轴拉伸两种不同变形状态下接触区域和厚度分布的差异，建立了平面应变和双轴拉伸状态下的受力预测模型。通过对不同拉深角截锥和锥体零件的ISF试验验证，力历史预测较好地捕捉了变形条件变化引起的不同力分量的波动，揭示了材料变形机理及其与整个ISF过程成形力特性的直接关系。在实际应用中，该模型成功地应用于基于isf的颅板制造过程中的受力预测。该模型还通过一系列ISF测试进行了验证，并对峰值和稳定力进行了准确的力预测。
A new analytical model for forming force prediction in the whole process of incremental sheet forming (ISF) is presented in this work. The modelling of contact region, thickness distribution and strain components are carried out as the basis for the prediction of vertical and horizontal forces. The effect of local contact behaviour and material deformation, as well as the behaviours of global bending, changes of deformation mode and contact condition are taken into account in the modelling of ISF force history. The force prediction model at both plane strain and biaxial tension condition areas is developed based on the differences in contact region and thickness distribution between these two different deformation states. Validated by ISF tests for a truncated cone and pyramid part with varying drawing angles, the prediction of force history captures well the fluctuation of different force components due to the change of deformation conditions and provides an insight into the material deformation mechanisms and the direct correlation to forming force characteristics of the whole ISF process. In a practical case, the model is successfully applied to the force prediction in ISF-based cranial plate manufacture. The model is also validated by a series of ISF tests with accurate force predictions of both the peak and stabilised forces.