堆叠的金字塔格子结构与I-beam支架的半静态和动态压缩行为
Mohammed Ayaz Uddin1, J Jefferson Andrew2, Imad Barsoum1,3,4
1Department of Mechanical and Nuclear Engineering, Khalifa University of Science & Technology, Abu Dhabi, UAE.
Scientific reports
|January 22, 2025
概括
与传统设计相比,新的I-beam格子结构显示出更好的强度和能量吸收. 调整堆叠序列进一步提高了它们的动态压缩性能,提供了卓越的刚性和耐用性.
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:
- 格子结构对于轻量化设计和能量吸收至关重要.
- 优化支架几何和堆叠序列是提高机械性能的关键.
- 传统的格子设计往往面临强度和能量吸收的局限性.
研究的目的:
- 研究新型堆叠金字塔格子 (SPL) 结构与I束支架的准静态和动态压缩性能.
- 为了比较I-beam SPL与传统的正方形杆SPL的性能.
- 探索不同堆叠序列对SPLs机械行为的影响.
主要方法:
- 通过近静态和低速度冲击测试 (1.54 m/s) 来对刚度,强度和能量吸收进行实验性评估.
- 用三种不同的堆叠序列3D打印SPL结构.
- 动态有限元 (FE) 模拟用于分析崩机制和故障模式.
主要成果:
- 与同等质量的正方形螺杆光相比,I-beam光显示出更高的刚性,耐用性和能量吸收能力.
- 准静态压缩显示强度增加了26%,能量吸收增加了109%.
- 低速撞击显示强度增加了34%,能量吸收增加了74%.
- 改变堆叠序列提高了动态压缩性能,在崩强度上提高了高达84%.
结论:
- I-beam支架设计显著提高了堆叠的金字塔格子的机械性能.
- 改进的I梁横向曲刚度通过影响曲行为,有助于提高性能.
- 堆叠序列优化是最大限度地提高SPLs动态压缩性能的一个关键因素.
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