对不同3D加工材料 (PLA,ABS和碳纤维增强尼龙PA12) 的设计和优化方法,这些材料承受着静态和动态负荷
S L Rodríguez-Reyna1, J H Díaz-Aguilera2, H R Acevedo-Parra3
1Facultad de Ingeniería, Universidad Autónoma de Luis Potosí, San Luis Potosí, S.L.P, C.P. 78290, Mexico.
Journal of the mechanical behavior of biomedical materials
|December 4, 2023
概括
这项研究优化了3D打印参数,以提高PLA,ABS和尼龙+CF材料的拉伸和疲劳强度,使用材料挤出 (MEX). 优化的零件表现出优越的强度,导致无限的疲劳寿命,特别是在ABS.
科学领域:
- 材料科学与工程 材料科学与工程
- 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:
- 材料挤出 (MEX) 3D打印被广泛使用,但针对特定材料属性的打印参数优化仍然至关重要.
- 了解打印参数与机械性能 (拉力和疲劳) 之间的相关性对于可靠的增材制造至关重要.
研究的目的:
- 使用MEX技术开发和优化设计和改进3D打印部件的方法.
- 研究印刷参数对PLA,ABS和尼龙+CF (PA12) 材料的拉力和疲劳性能的影响.
- 建立基于实验结果的疲劳寿命预测模型.
主要方法:
- 三个阶段的方法:预处理 (确定打印因素),实验设计 (优化抗拉强度) 和使用统计建模进行序列优化.
- 评估打印模式,填充百分比和打印方向,以优化拉伸强度.
- 疲劳分析考虑打印方向,填充,图案和负载范围,然后进行韦布尔和巴斯金的模型分析.
主要成果:
- 3D打印零件的优化拉伸强度超过了基础材料的最终拉伸强度 (UTS),从而产生无限的疲劳寿命.
- ABS表现出优越的疲劳行为 (20 MPa 的1x10^7 周期),其次是尼龙+CF (18 MPa 的1x10^6 周期) 和PLA (24 MPa 的1x10^5 周期).
- 开发了疲劳寿命预测模型 (Weibull,Basquin's),与实验数据有很好的相关性.
结论:
- 开发的方法有效地优化了3D打印参数,以提高机械性能.
- 优化拉伸强度与提高耐疲劳性直接相关,材料类型和打印策略起着重要作用.
- 这项研究为打印参数与常见3D打印材料的拉力和疲劳性能之间的关系提供了宝贵的见解.
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