可编程的异质片状格子架构,用于双重机械保护
Yuanyuan Tian1,2, Xin Zhang3, Boyuan Hou2
1HP-NTU Digital Manufacturing Corporate Lab, Nanyang Technological University, Singapore 639798, Singapore.
概括
这项研究引入了新的异质状格子架构,可以显著提高能量吸收和机械保护. 这些设计可以防止剪切带的形成,提高航空航天和汽车应用的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 增材制造 增材制造 增材制造
背景情况:
- 格子架构通常在压缩下形成剪切带,减少能量吸收和承载能力.
- 这种不稳定性损害了结构完整性,使外部保护优于全球业绩.
研究的目的:
- 使用增材制造设计具有增强机械性能的异质状格子架构.
- 为了研究抑制剪带形成并提高能量吸收和保护能力.
主要方法:
- 不同质的状格子的制造与交替的体中心立方体 (BCC) 和面中心立方体 (FCC) 单元细胞.
- 利用增材制造和利用双相纳米状晶体几何学.
- 分析压缩下的机械反应,重点关注能量吸收和变形机制.
主要成果:
- 叶片格子显示比BCC格子高出10倍的特定能量吸收和9倍的能量吸收效率.
- 剪切带核化被抑制,这是由于相邻的异质层中塑料曲的离散能量值.
- 观察到增强的平原应力和粉碎力效率,归因于同时发生的BCC单元细胞变形和屏蔽效应.
结论:
- 与传统设计相比,异质状格子提供了优越的能量吸收和机械保护.
- 该设计可实现可编程的局部机械响应,用于双重内部和外部保护.
- 这种方法为各种行业开发先进的机械保护器提供了新的途径.
相关概念视频
01:22Mechanical Systems
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01:23Radial System Protection
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In a radial system with a fault downstream of the third breaker, ideally, only the third breaker will open, isolating the fault and interrupting the load connected beyond it. The second breaker has a longer delay setting,...
In a radial system with a fault downstream of the third breaker, ideally, only the third breaker will open, isolating the fault and interrupting the load connected beyond it. The second breaker has a longer delay setting,...