张菲菲,孙德强.冲击速度和应变率对六边形蜂窝共面缓冲性能的影响[J].包装工程,2018,39(3):43-48.
ZHANG Fei-fei,SUN De-qiang.The Effect of Impact Velocity and Strain Rate on the In-plane Cushioning Properties of Hexagonal Honeycomb[J].Packaging Engineering,2018,39(3):43-48. |
| 冲击速度和应变率对六边形蜂窝共面缓冲性能的影响 |
| The Effect of Impact Velocity and Strain Rate on the In-plane Cushioning Properties of Hexagonal Honeycomb |
| 投稿时间：2017-07-31 修订日期：2018-02-10 |
| DOI：10.19554/j.cnki.1001-3563.2018.03.009 |
| 中文关键词: 六边形蜂窝 缓冲性能 冲击速度 应变率 有限元分析 |
| 英文关键词: hexagonal honeycomb cushioning properties impact velocity strain rate finite element analysis |
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| 中文摘要: |
| 目的 通过改变压缩方向的厚度，即共面方向的蜂窝层数，来研究冲击速度和应变率对六边形蜂窝共面缓冲性能的影响。方法 借助软件Ansys/LS-DYNA来模拟六边形蜂窝在应变率恒定时冲击速度对蜂窝共面缓冲性能的影响，以及六边形蜂窝在速度值恒定时应变率对蜂窝共面缓冲性能的影响。结果 设定3组应变率恒值（300, 500, 1000 s−1）研究不同冲击速度对蜂窝动态峰应力的影响，随着速度的增加，动态峰应力也增加。设定3组冲击速度恒值（3, 50, 100 m/s）研究不同应变率对蜂窝动态峰应力的影响，随着应变率增加，动态峰应力基本不变。结论 在试件材料选用双线性硬化的铝基材料，壁材视为应变率不敏感的模型下，应变率对正六边形蜂窝的动态力学性能和缓冲性能基本无影响。 |
| 英文摘要: |
| The work aims to study the effect of impact velocity and strain rate on the in-plane cushioning properties of hexagonal honeycomb by changing the thickness in the compression direction, namely, the number of honeycomb layers. Software Ansys/LS-DYNA was used to simulate the effect of impact velocity on the in-plane cushioning properties of honeycomb under constant strain rate, and the effect of strain rate on the in-plane cushioning properties of honeycomb under constant velocity value. Three sets of strain rate constants (300, 500, 1,000 s−1) were set to study the effects of different impact velocities on the dynamic peak stress of the honeycomb. The dynamic peak stress increased with the increase of the velocity. Three sets of strain rate constants (3, 50, 100 m/s) were set to study the effects of different strain rates on the dynamic peak stress of the honeycomb. The dynamic peak stress remained basically unchanged with the increase of strain rate. When the tested material is bilinear hardened aluminum substrate, and the wall material is not sensitive to the strain rate, the strain rate basically has no influence on the dynamic mechanical property and cushioning property of the regular hexagonal honeycomb. |
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