EVA闭孔泡沫静动态压缩与冲击的仿真分析
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TB484.3

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国家自然科学基金资助项目(51575327);陕西省科技厅陕西省创新能力支撑计划项目(2025JC-GXPT-022);陕西省科技厅中试基地建设项目(2023ZSJD-06)


Simulation Analysis of Static and Dynamic Compression and Impact of EVA Closed Cell Foam
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    摘要:

    对EVA闭孔泡沫材料进行静动态压缩试验及有限元仿真,探究不同密度EVA闭孔泡沫的缓冲性能与仿真分析的可靠性。通过闭孔泡沫材料的静态和动态压缩试验得到应力-应变曲线等数据,以此进一步分析其力学性能。选择LS-DYNA中Mat83本构模型,建立EVA闭孔泡沫的有限元模型,将仿真结果与同工况的试验结果进行对比。在静态与动态压缩试验中,随着密度变大,相同应变的EVA闭孔泡沫的应力会提高,EVA闭孔泡沫的最大能量吸收也会变大,但不同工况下,会有一个中间密度的EVA闭孔泡沫缓冲效果最理想。在仿真方面,LS-DYNA中Mat83本构模型仿真曲线与试验曲线吻合较好。LS-DYNA中Mat83本构模型能很好地模拟EVA闭孔泡沫在动态冲击下的力学行为。

    Abstract:

    Static and dynamic compression tests and finite element simulations are conducted on EVA closed cell foam materials to investigate the cushioning performance of EVA closed cell foam with different densities and the reliability of the simulations. Data such as stress-strain curves are obtained from static and dynamic compression tests of closed cell foams as a way to further analyze their mechanical properties. The Mat83 intrinsic model in LS-DYNA is selected to establish the finite element model of EVA closed cell foam, and the simulation results are compared with the test results under the same working condition. In the static and dynamic compression tests, as the density becomes larger, the stress of the EVA closed cell foam with the same strain increases, and the maximum energy absorption of the EVA closed cell foam becomes larger, while there will be an intermediate density of the EVA closed cell foam with the best cushioning effect under different working conditions. In terms of simulation, the simulation curves of Mat83 intrinsic model in LS-DYNA are in good agreement with the experimental curves. The Mat83 intrinsic model in LS-DYNA can well simulate the mechanical behavior of EVA closed cell foam in dynamic impact.

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叶润杰,孙德强,马兴元,司博涵. EVA闭孔泡沫静动态压缩与冲击的仿真分析[J].包装学报,2025,17(3):36-45.

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  • 在线发布日期: 2025-05-28
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