在横向压缩下对空的和聚氨泡填充的聚乙烯管的机械行为和塑性变形进行比较分析
Seyedahmad Taghizadeh1, Abbas Niknejad2, Lorenzo Maccioni3
1Faculty of Science and Technology, Free University of Bozen-Bolzano, Bolzano, Italy. staghizadeh@unibz.it.
Scientific reports
|December 24, 2025
概括
与空管相比,聚氨泡填充的聚乙烯管提供优越的能量吸收和稳定的性能. 更高的泡密度和特定的几何配置提高了它们在结构应用中的承载能力.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 聚合物科学 聚合物科学
背景情况:
- 聚乙烯管用于各种结构应用.
- 研究能量吸收机制对于材料设计至关重要.
- 聚氨泡是增强结构性质的潜在填充剂.
研究的目的:
- 为了比较在横向压缩下空的和聚氨泡填充的聚乙烯管的能量吸收和塑性变形.
- 评估几何参数 (长度,直径,墙壁厚度) 和填料密度对性能的影响.
- 识别占主导地位的损害机制,并提供设计指导.
主要方法:
- 在横向压缩下对圆形聚乙烯管进行实验研究.
- 空管和用不同密度的聚氨泡填充的管之间的比较.
- 管道长度,直径和壁厚的系统变化.
- 对承载能力,能量吸收和负载位移反应的分析.
主要成果:
- 与空管相比,充满泡的管道显示出更高的能量吸收和更可预测的负载位移曲线.
- 增加管长,墙壁厚度和填充剂密度通常会提高能量吸收.
- 管径有不同的影响:较小的直径有利于空管,而较大的直径有利于充满泡的管.
- 泡断裂,粉碎和凝结是充满管道的主要损伤机制.
- 泡和管道之间的粘合力显著提高了峰值负载能力.
结论:
- 聚氨泡填充显著提高了聚乙烯管的能量吸收和结构效率.
- 对于需要特定吸收能量 (SAE) 的应用,建议使用高密度聚氨泡.
- 几何因素,特别是直径,在优化性能方面发挥着关键作用,特别是在充满泡的系统中.
- 该研究为设计使用这些复合结构的先进承载系统提供了有价值的数据.
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