在拉力和曲负荷下对3D DLP打印的固体和Voronoi PLA树脂样本进行实验和数值研究
Zorana Golubović1, Jovan Tanasković1, Aleksa Milovanović2
1Faculty of Mechanical Engineering, University of Belgrade, 11120 Belgrade, Serbia.
Polymers
|May 14, 2025
概括
使用数字光处理 (DLP) 3D打印的增材制造 (AM) 允许精确控制内部结构. 固体设计提供了更高的强度,而Voronoi图案提高了曲性能,从而使材料的使用得到了优化.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 增材制造 增材制造 增材制造
背景情况:
- 瓦特光聚合,包括数字光处理 (DLP),促进复杂的几何学与受控的材料结构.
- 研究内部结构对机械性能的影响对于优化3D打印组件至关重要.
研究的目的:
- 分析内部结构 (固体与Voronoi) 如何影响通过DLP3D打印生产的PLA树脂样本的机械性能.
- 开发和验证用于预测增材制造组件性能的数值模型.
主要方法:
- 使用DLP3D打印机制造固体和Voronoi图案的PLA标本.
- 拉伸和曲测试,以评估机械性能.
- 显微镜分析检查断裂表面.
- 使用Ansys 2025R01对实验数据进行数值模型的开发和验证.
主要成果:
- 固体样本显示出优越的抗拉强度.
- 沃罗诺伊结构在曲负荷下表现出增强的性能,尽管由于孔隙性,整体承载能力较低.
- 数字模型与实验结果有很强的相关性,证实了它们在设计验证中的可靠性.
- 显微镜分析显示了固体 (易碎,有不规则) 和Voronoi (碎片化,沿空隙) 标本的明显断裂机制.
结论:
- 增材制造可以通过精确的内部结构控制来优化机械性能和材料效率.
- 经过验证的数值模型可以通过启用机械和生物医学应用的初步设计验证来显著降低开发成本.
- 这些发现支持使用AM来设计诸如骨科固定装置之类的组件.
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