基于LS-DYNA的真空输纸技术数值模拟

The Numerical Simulation of Suction-tape Feeding Technology Based on LS-DYNA

为提高真空输纸性能,对真空输纸技术中纸张的力学行为进行了模拟分析。由于柔性薄片纸张受力屈曲具有几何非线性的特点,提出了真空输纸技术中纸张力学行为的显式动力学数值分析方法,基于LS-DYNA的壳单元建立了纸张的有限元模型。探讨了不同挺度的纸张在输纸带孔处的应力分布、变形规律及承受侧规拉力的性能。结果表明,随着纸张挺度的增大,真空吸附过程中的纸面应力和隆起变形均减小,而侧规拉力承载能力增强。

To improve the performance of suction-tape feeding, the simulation analyses of paper＇s mechanical behavior in suction-tape feeding technology was conducted. Considering the geometric nonlinearity of flexible thin paper＇s buckling, this article proposed the explicit dynamic numerical analysis method of the paper＇s mechanical behavior in suction-tape feeding technology, established the paper＇s finite element model based on the shell element of LS-DYNA. The article discussed the stress distribution, deformation law and the performance to resist the side lay＇s drawing force of the papers with different stiffness. Results showed that with the increase of paper stiffness, both the paper stress and the ridgy deformation was decreased during vacuum suction, while the ability of resisting the side lay＇s drawing force was enhanced.