| 摘要: |
| 把静态压缩本构方程拟合得到的应力-应变数据作为缓冲材料的载荷曲线，利用有限元仿真软件ANSYS LS-DYNA对DY-3重锤冲击EPP材料进行了仿真，得到了响应加速度-时间曲线，并与试验曲线进行了对比，误差在6%以内，说明了利用本构方程拟合的应力-应变载荷曲线，既能克服将缓冲材料简化为线性材料导致的缺陷，又避免了需要通过试验获取载荷曲线的弊端。 |
| 关键词: 本构方程 发泡聚丙烯 缓冲设计 有限元分析 |
| DOI： |
| 分类号:TB487; TB484.3 |
| 基金项目: |
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| Applications of EPP Constitutive Model in Impact Test Simulation |
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LIU Cheng1, LIU Xun1, SHEN Xun-le2
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1.Shaanxi University of Science & Technology, Xi'an 710021, China;2.Nefab Packaging Engineering (Wuxi) Co. Ltd., Wuxi 201206, China
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| Abstract: |
| EPP drop test by DY-3 test machine was simulated by using ANSYS LS-DYNA and loading curves from stress-strain data fitted by compression constitutive equation. Response acceleration-time curves were obtained and compared with experimental result. Comparison results showed that the error of simulation result is less than 10%, which means that the fitting data derived by static compression constitutive equation can not only overcome the inaccuracy of simplifying EPP as a linear material, but also avoid using experiment to obtain the loading curve. |
| Key words: constitutive equation expanded polypropylene cushioning design FEA |
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