| 摘要: |
| 目的 以聚丙烯材料为研究对象，研究密度对其动态冲击性能的影响。方法 对4种不同密度的聚丙烯材料进行动态压缩试验，分析接触力、位移和应变以及吸收能、比吸能的变化，从而研究动态条件下不同密度的聚丙烯材料的动态冲击性能。结果 当密度一定时，最大接触力、最大位移、最大应变、比吸能随冲击能的增大而增大。当冲击能一定时，最大接触力随密度的增大而增大，最大位移、最大应变、比吸能随密度的增大而减小。结论 考虑到轻量化以及成本因素，在安全范围内，选择缓冲材料时可以选择密度较小的聚丙烯材料。 |
| 关键词: 聚丙烯材料 动态压缩 密度 冲击能 吸收能 |
| DOI：10.19554/j.cnki.1001-3563.2018.23.015 |
| 分类号:TB484 |
| 基金项目:国家自然科学基金（51575327）；陕西省教育厅重点试验室及基地项目（16JS014）；陕西省教育厅2014陕西本科高校专业综合改革试点子项目（陕教高[2014]16号） |
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| Influence of Density upon Dynamic Crushing Behaviour of Polypropylene Materials |
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JIN Qiang-wei, SUN De-qiang, LI Guo-zhi, XING Yue-qing
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a.Shaanxi Province Key Laboratory of Papermaking Technology and Specialty Paper b.National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi'an 710021, China
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| Abstract: |
| The work aims to study the influence of density of polypropylene material on its impact performance, with the polypropylene material as the study object. The dynamic crushing experiment was conducted on the polypropylene materials of four different densities to analyze the contact force, displacement and strain, as well as the change of absorbed energy and specific energy absorption, thus studying the dynamic crushing behavior of polypropylene materials of different densities under dynamic conditions. With the increasing impact energy, the maximum contact force, maximum displacement, maximum strain and specific energy absorption increased gradually for the given density. When the impact energy was fixed, the maximum contact force increased with the increase of density, while the maximum displacement, maximum strain and specific energy absorption decreased with the increasing density. For the weight reduction and cost saving, it is possible to use the polypropylene material with low densities when selecting the cushioning materials within a safe range. |
| Key words: polypropylene materials dynamic crushing density impact energy absorbed energy |
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