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基于受约束层阻尼结构的聚尿素-钢复合板的防爆性能研究
Rui Zhang1,2, Qi Dong2, Zhiqiang Fang3
1Shock and Vibration of Engineering Materials and Structures Key Lab of Sichuan Province, Southwest University of Science and Technology, Mianyang 621010, China.
本研究引入了一种使用粘弹性聚尿素 (Q413t) 和柔性聚尿素 (FPU-1) 的新型受约束层阻尼涂层,以增强爆炸减轻. 新的涂层有效地平衡了阻尼和强度,大大减少了爆炸负荷下的结构变形.
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:
- 传统的聚尿素材料在平衡阻尼性能和机械强度以有效减轻爆炸时面临挑战.
- 开发先进的缓冲结构对于改善对爆炸力的保护至关重要.
研究的目的:
- 开发和评估一个受约束层阻尼涂层结构,以减轻爆炸.
- 优化聚氨酸基基材料中缓冲和机械强度的协同组合.
- 为了研究新型涂层在高压下的保护机制和性能.
主要方法:
- 在不同的加载速度下进行拉伸测试,以描述Q413t和FPU-1多尿素的机械行为.
- 动态热力学分析,以评估聚尿素材料的阻尼性能.
- 接触式爆炸试验 (75克TNT) 和有限元模拟,以探索保护机制.
主要成果:
- Q413t聚尿素表现出显著的应变率敏感性,而FPU-1显示出最小的强度变化.
- Q413t提供了优异的阻尼 (0-104 Hz),而FPU-1在更高的频率 (104-105 Hz) 上实现了高损耗系数 (0.3).
- 一个1毫米的缓冲层与3毫米的约束层在75克TNT爆炸下减少了35.26%的最大位移,最佳厚度比为1:3.
结论:
- 约束层阻尼涂层有效地消散能量和分配负载,增强防爆保护.
- 约束层限制了位移,减少了结构变形,而层间运动增加了整体减压.
- 这种协同方法优化了机械强度和能量消耗,显示了工程应用在爆炸减轻方面的巨大潜力.
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