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3D打印PLA的质量减少对负载转移能力的影响-循环经济前景

Aneta Liber-Kneć^1,2, Sylwia Łagan¹

¹Faculty of Mechanical Engineering, Department of Applied Mechanics and Biomechanics, Cracow University of Technology, al. Jana Pawła II 37, 31-864 Kraków, Poland.

Materials (Basel, Switzerland)

|July 30, 2025

概括

在3D打印的聚乳酸 (PLA) 部件中优化灌装密度可以平衡机械性能和材料效率. 减少灌装密度显著降低了强度,但对负载传输能力的影响很小,支持可持续的增材制造.

科学领域:

材料科学材料科学材料科学
添加剂制造添加剂制造添加剂制造
机械工程机械工程

背景情况:

在3D打印的聚乳酸 (PLA) 零件中优化灌装密度对于减少材料使用,成本和浪费至关重要.
了解不同灌装密度和水化阶段的机械行为对于工程应用至关重要.
这项研究为增材制造中的数值模拟提供了必要的数据.

研究的目的:

为了研究不同灌装密度对3D打印的PLA标本机械性能的影响.
为了评估PLA零件在初始和水合条件下的机械行为.
评估材料效率和3D打印PLA的机械性能之间的权衡.

主要方法:

PLA标本以100%,75%和25%的灌装密度进行制造.
进行了拉伸,压缩和压力放松测试.
数字图像相关性 (DIC) 用于分析拉伸负荷下的表面应变场,并评估一个月的水解降解效应.

主要成果:

降低灌装密度显著降低了最终抗拉强度,模量,压力强度和波松比.
40%的质量减少 (100%到25%的充填) 导致拉伸强度下降56%,Young的模量下降53%.
补水没有改变机械性能;应力松显著下降,从100%降至75%的灌装密度.

结论:

在3D打印的PLA零件中优化灌装密度可以实现机械性能和材料效率之间的平衡.
虽然100%填充能产生最好的机械性能,但较低的密度 (75%至25%) 对拉伸和压缩负载转移的影响最小.
酸的生物降解性和增材制造的资源效率与闭环经济原则和可持续发展保持一致.

关键词:

通过3D打印打印3D打印.数字图像相关性相关性数字图像相关性机械性能机械性能机械性能聚乙烯的多种类型压力放松放松压力放松

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