通过增材制造对连续碳纤维增强复合材料混合格子结构的平面内压缩性能进行研究.
Lingqi Jin1, Jun Shi1, Zhixin Chen1
1School of Transportation and Logistics Engineering, Wuhan University of Technology, Wuhan 430070, China.
Polymers
|July 13, 2024
概括
由连续纤维增强复合材料制成的混合格子结构显示了增强的机械性能. 结合不同的格子设计显著提高了性能,形圆形 (RC型) 结构在弹性模量和能量吸收方面表现优于其他结构.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 复合材料 复合材料 复合材料
背景情况:
- 连续纤维增强复合格子结构 (CFRCLSs) 提供轻量化和高强度的优势.
- 传统的蜂结构已被广泛研究,但它们的机械性能往往达到结构极限.
- 优化单晶格设计在进一步提高性能方面存在局限性.
研究的目的:
- 研究和混合配置对CFRCLSs机械性能的影响.
- 为了比较新型混合结构与传统六边形和单晶格设计的性能.
- 分析这些先进的格子结构的内平面压缩,能量吸收和变形行为.
主要方法:
- 使用碳纤维增强聚乳酸 (PLA) 制造化丝制造 (FFF) 来制造CFRCLS样品.
- 在内平面压缩下对五种混合结构 (R型,OOA型,OHA型,ONA型,RC型) 和六角结构 (H型) 的实验测试.
- 分析机械性能,包括弹性模量和屈服强度,以及能量吸收和变形特性.
主要成果:
- 混合晶格结构与单晶格设计相比,显示出明显改善的机械性能.
- 形圆形结构 (RC型) 的弹性模量为73.2 MPa,远高于六角形结构 (H型) 的6.08 MPa.
- 与R型相比,RC型结构实现了弹性模量增加12.7倍,收益强度增加5.4倍,能量吸收增加4.4倍.
结论:
- 变和混合模式有效地改变了变形行为,并增强了CFRCLSs的机械性能.
- 混合晶格设计,特别是RC型,克服了单晶格结构的性能限制.
- 这些发现为设计各种应用中具有卓越机械性能的先进复合格子结构提供了一条途径.
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