在带有STF和M-STF封装的三明治结构中强力减弱性能
Mohammad Rauf Sheikhi1,2,3, Kenan Bayrak4, Esra Ozdemir5
1The State Key Laboratory of Heavy-duty and Express High-power Electric Locomotive, Changsha, 410075, China.
Heliyon
|March 7, 2024
概括
将剪切加厚液 (STF) 和多功能STF添加到三明治结构中可以增强力减弱. 优化的核心几何形状,如H6_STF_CNT,显示了能量吸收的显著改善,证明了先进保护材料的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 复合材料 复合材料 复合材料
背景情况:
- 使用面板和XPS泡芯的三明治结构是因为它们的轻量级和绝缘性能.
- 提高这些结构的减力能力对于抗冲击应用至关重要.
- 剪切加厚液体 (STF) 和它们的多功能变体 (M-STF) 提供可调节的性能,以减轻冲击.
研究的目的:
- 调查将STF和M-STF纳入/XPS泡三明治结构不同核心几何形状的影响.
- 为了评估这些改性复合结构在冲击负荷下减弱力性能.
- 评估多壁碳纳米管 (MWCNTs) 对STF属性的影响及其对性能增强的贡献.
主要方法:
- 制造STF (40%的SiO2在PEG400中) 和M-STF (最多有1.5%的MWCNT).
- 为三明治结构加工六种不同的XPS泡芯几何形状.
- STF和M-STF的风学和电性质的表征.
- 在5,10和15 J能量级别进行冲击落下塔测试,以测量力减弱.
主要成果:
- 与其他几何体相比,V6_STF和H6_STF核心设计表现出优越的减弱力.
- 将M-STF (0.5 wt% MWCNT) 纳入H6_STF结构 (H6_STF_CNT) 进一步提高了比基线的24.8%的力减弱.
- 添加MWCNTs改变了STF的风学和电学特性.
结论:
- STF和M-STF显著提高了/XPS泡三明治结构的强力减弱性能.
- 优化核心几何学对于最大限度地发挥STF和M-STF的好处至关重要.
- 这些改造的三明治结构在需要高冲击能量吸收的应用中显示出前景.
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