基于能源方法的乙烯基乙烯酸共聚合物泡的动态破碎行为
Yueqing Xing1, Xiya Guo1, Guowei Shu1
1College of Bioresources Chemical and Materials Engineering (College of Flexible Electronics), Shaanxi University of Science & Technology, Xi'an 710021, China.
Polymers
|July 29, 2023
概括
这项研究研究了动态冲击下的乙烯乙酸共聚合物 (EVA) 泡,发现密度显著影响特定能量吸收 (SEA),但不是总体吸收的能量. 建议使用较薄,较不密集的EVA泡来进行轻量化,经济高效的缓冲.
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:
- 乙烯乙酸共聚合物 (EVA) 由于其缓冲性能而广泛使用.
- 了解EVA泡的动态粉碎行为对于优化冲击能量吸收至关重要.
- 之前的研究已经探索了静态特性,但在不同密度和厚度下的动态性能需要进一步澄清.
研究的目的:
- 实验性地研究EVA泡的动态粉碎机制和性能.
- 分析密度和厚度对机械行为和动态冲击下的能量吸收的影响.
- 为优化EVA泡缓冲设计提供见解,考虑轻量化和成本因素.
主要方法:
- 在不同密度和厚度的EVA泡样本上进行了动态压缩测试.
- 冲击能量水平被控制并应用于模拟动态负载条件.
- 测量和分析了关键的机械参数,包括接触力,位移,应变,吸收能量和特定能量吸收 (SEA).
主要成果:
- 样本密度显著影响特定能量吸收 (SEA),更高的密度产生更大的SEA.
- 发现吸收能量和SEA主要由冲击能量决定,厚度对这些参数的影响有限.
- 虽然密度影响SEA,但它也增加了质量和成本;厚度主要影响最大接触力.
结论:
- 埃瓦泡的能量吸收效率在很大程度上独立于研究范围内的厚度.
- 密度是提高特定能量吸收 (SEA) 的关键因素,但不是总吸收的能量.
- 为了优化缓冲,建议选择较低密度和厚度的EVA泡,以平衡性能,重量和成本.
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