在准静态压缩过程中通过增材制造的蜂吸收可循环的能量
Colleen M Murray1, Grace N Johnson1, Min Mao1
1Composites Research Laboratory, Department of Aerospace Engineering, University of Maryland, College Park, MD 20742, USA.
Polymers
|April 26, 2025
概括
较小的刻字直径和曲折启动器显著提高了在增材制造的烯丁 styrene (ABS) 蜂中的能量吸收. 这些几何修改提高了用于航空航天和汽车应用的压缩和能量吸收效率.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 添加剂制造 添加剂制造 添加剂制造
背景情况:
- 蜂结构具有很高的强度与重量比,使其适合用于航空航天和汽车行业的能量吸收.
- 增材制造允许精确控制蜂几何形状,以提供量身定制的性能.
- 烯丁乙烯 (ABS) 是用于3D打印的常见聚合物,但其在脆弱的能量吸收应用中的性能需要研究.
研究的目的:
- 为了研究刻入直径对增材制造的蜂吸收能量特性的影响.
- 评估曲启动器对ABS蜂粉碎和能量吸收效率的影响.
- 为了确定几何变化如何影响脆性蜂巢结构的性能.
主要方法:
- 通过添加制造的ABS蜂产生了不同的刻字直径 (10毫米和20毫米).
- 准静态压缩测试使用伺服液压材料测试系统进行.
- 具有和没有曲启动器 (小三角切片) 的样本进行了比较.
主要成果:
- 压碎效率和能量吸收效率随着刻入直径的减少而增加.
- 10毫米的刻字直径的粉碎效率为62%,而20毫米直径的粉碎效率为20.29%.
- 10毫米样本的能量吸收效率为45%,而20毫米样本的效率为16.70%.
- 曲启动器始终提高了粉碎和能量吸收效率.
结论:
- 降低刻印直径是一种有效的策略,可以提高ABS蜂的能量吸收.
- 包含曲启动器显著提高了这些结构的能量吸收能力.
- 通过增材制造进行几何优化为先进的能量吸收解决方案提供了前景.
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