试验和数值研究对冲击行为的沙钟格子三明治结构与梯度的冲击行为
Hexiang Wu1,2, Jia Qu1, Linzhi Wu1
1Key Laboratory of Advanced Ship Materials and Mechanics, College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China.
Materials (Basel, Switzerland)
|September 28, 2023
概括
调查分级的砂钟格子三明治结构显示,梯度分布显著影响冲击下的机械性能. 优化设计可以在特定变形阶段提高负载一致性和能量吸收.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 结构分析 结构分析
背景情况:
- 在能量吸收应用中,三明治结构至关重要.
- 分级格子结构提供可调节的机械性能.
- 了解撞击行为对于结构完整性至关重要.
研究的目的:
- 为了研究等级的砂时钟格子三明治结构的冲击机械性能.
- 分析梯度分布对变形,峰值负载和能量吸收的影响.
- 为了评估撞击质量和速度的影响.
主要方法:
- 在冲击压缩下对结构的实验测试.
- 数字模拟用于模拟冲击行为.
- 分析变形模式和能量吸收能力.
主要成果:
- 冲击质量和速度显著影响机械性能,即使在相同的冲击能量.
- 梯度分布影响初始和峰值压缩负载,允许负载的一致性.
- 总能量吸收是一致的,但吸收在不同变形阶段根据梯度设计而有所不同.
结论:
- 梯度分布是砂時計格子三明治结构的关键设计因素.
- 优化的梯度设计可以提高负载一致性和量身定制能量吸收.
- 质量下降分布显示了早期能量吸收的优势,而质量增量分布在后期阶段更好.
相关概念视频
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