玻璃纤维复合材料在低速度冲击下的行为
Iulian Păduraru1, George Ghiocel Ojoc1, Horia Petrescu2
1"Dunărea de Jos" University of Galati, Faculty of Engineering, Department of Mechanical Engineering, 800008 Galati, Romania.
Polymers
|January 17, 2024
概括
玻璃纤维复合材料在汽车和海洋应用中显示出有前途的抗冲击性能. 六层较厚的面板有效抵御低速冲击,证明了它们在保护组件设计中的潜力.
科学领域:
- 材料科学与工程 材料科学与工程
- 复合材料 复合材料 复合材料
- 冲击力学 冲击力学
背景情况:
- 玻璃纤维复合材料越来越多地用于汽车和船舶等苛刻的行业.
- 了解它们在低速度冲击下的行为对于设计弹性组件至关重要.
- 现有的研究往往侧重于高速冲击,在低速度冲击分析中留下了一个空白.
研究的目的:
- 实验评估玻璃纤维复合材料的低速度冲击行为.
- 分析这些复合材料适用于抗冲击的汽车和船舶部件的适用性.
- 开发和验证一个有限元模型,用于预测复合式故障机制.
主要方法:
- 四轴玻璃纤维织物和环氧树脂复合材料的实验室规模制造.
- 使用Instron CEAST 9340的低速度撞击测试,可以改变撞击速度,能量和撞击器直径.
- 使用Ansys显式动力学进行中级失效和应力分布分析的有限元分析 (FEA).
- 微观 (SEM) 和宏观 (摄影) 检查故障模式.
主要成果:
- 两层 (1.64毫米) 的面板在2米/秒的冲击速度 (11 J) 时只显示了部分透.
- 六层 (5.25毫米) 的面板在4米/秒的撞击速度 (45J) 时表现出最小的后面损伤 (微剥皮) 与两种撞击器.
- FEA提供了关于复合材料结构中的故障阶段和应力分布的见解.
结论:
- 玻璃纤维复合材料,特别是较厚的配置,显示出具有较低速度冲击阻力的巨大潜力.
- 该研究验证了FEA用于预测冲击下的复合材料故障的使用.
- 结果支持继续研究这些复合材料用于需要冲击保护的汽车和海洋应用.
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