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3D打印连续碳纤维增强聚合物蜂结构的路径规划和曲行为
Kui Wang1, Depeng Wang1, Yisen Liu1
1Key Laboratory of Traffic Safety on Track of Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha 410075, China.
Polymers
|January 17, 2024
概括
使用化沉积建模 (FDM) 制造的连续纤维增强聚合物蜂巢结构 (CFRPHS) 显示基于打印路径的各种性能. 一个分层的梯形路径产生了这些先进的复合材料中最高的特定负载能力和屈曲刚度.
科学领域:
- 材料科学 材料科学 材料科学
- 复合材料工程 复合材料工程
- 添加剂制造 添加剂制造 添加剂制造
背景情况:
- 连续纤维增强聚合物复合材料提供高特异性强度和模量,对于承载应用至关重要.
- 打印路径显著影响连续纤维增强聚合物蜂结构 (CFRPHS) 的结构完整性和机械性能.
研究的目的:
- 调查不同打印路径对通过化沉积建模 (FDM) 制造的CFRPHS的结构缺陷和曲性能的影响.
- 确定最佳的打印路径,以最大限度地提高CFRPHS的机械性能.
主要方法:
- 使用FDM技术制造具有不同印刷路径的CFRPHS.
- 在路径拐角处分析纤维脱,以确定结构缺陷.
- 三点曲试验用于评估曲性能和变形模式.
主要成果:
- 在路径角处的纤维脱导致度较低的节点,导致度分布不均.
- 打印路径对连续纤维的曲性能增强有重大影响.
- 带有分阶梯形路径的CFRPHS显示出优异的特定负载能力 (68.33 ± 2.25 N/g) 和硬度 (627.70 ± 38.78 N/mm).
结论:
- 打印路径设计对于控制CFRPHS中的纤维分布,结构缺陷和刚度均性至关重要.
- 阶段式梯形路径是实现FDM制造的CFRPHS中增强机械性能的最佳选择.
- 了解打印路径效应是优化这些先进复合结构中应力分布和故障模式的关键.
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