刘 乘,刘 勋,沈训乐.发泡聚丙烯本构模型在冲击试验仿真中的应用[J].包装工程,2012,33(15):40-43,47. LIU Cheng,LIU Xun,SHEN Xun-le.Applications of EPP Constitutive Model in Impact Test Simulation[J].Packaging Engineering,2012,33(15):40-43,47. |
发泡聚丙烯本构模型在冲击试验仿真中的应用 |
Applications of EPP Constitutive Model in Impact Test Simulation |
投稿时间:2012-06-10 修订日期:2012-08-10 |
DOI: |
中文关键词: 本构方程 发泡聚丙烯 缓冲设计 有限元分析 |
英文关键词: constitutive equation expanded polypropylene cushioning design FEA |
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中文摘要: |
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。 |
英文摘要: |
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. |
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