压力膜的冲击:还原系数
Baptiste Darbois Texier1, Loïc Tadrist2
1Université Paris-Saclay, CNRS, FAST, 91405 Orsay, France.
Physical review. E
|June 17, 2023
概括
压缩膜的恢复系数随膨胀压力增加而增加,但随着撞击速度而下降. 这项研究探讨了撞击期间的能量消耗,以获得更好的保护设计.
科学领域:
- 物理 物理学 物理
- 材料科学 材料科学 材料科学
- 生物力学 生物力学
背景情况:
- 压力膜用于各种应用,包括防护设备,如安全气囊和体育用品.
- 最佳通胀至关重要; 膨胀不足的膜提供了很差的保护,而过度膨胀的膜会带来伤害风险.
- 归还系数量化了膜在撞击时的能量消耗,这是其保护性能的关键因素.
研究的目的:
- 研究膜性质,膨胀压力和还原系数之间的关系.
- 了解这些因素如何影响撞击期间的能量消散.
- 开发一个球形膜冲击的物理模型.
主要方法:
- 使用球形膜进行了一个模型实验,以测量还原系数.
- 该研究分析了恢复系数对通胀压力和冲击速度的依赖性.
- 开发了一种物理模型,用于带有小痕的准静态冲击.
主要成果:
- 发现,随着通货膨胀压力的增加,还款系数会增加.
- 相反,随着撞击速度的增加,还原系数下降.
- 球状膜中的动能损失归因于能量转移到振动模式.
结论:
- 该研究提供了对影响压力膜恢复系数的因素的全面了解.
- 研究结果强调了通胀压力和冲击特征在确定能量消耗方面的关键作用.
- 开发的物理模型有助于设计更安全,更有效的压力膜结构,用于冲击保护.
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