相关实验视频
Updated: Jan 29, 2026

08:43
Fused Filament Fabrication FFF of Metal-Ceramic Components
Published on: January 11, 2019
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机械,疲劳和热特性 ASA,尼龙12,PC和PC-ABS通过化丝制造 (FFF) 制造
Ângela Rodrigues1, Ricardo Branco2, Margarida Franco3
1UNIDEMI, Department of Mechanical and Industrial Engineering, NOVA School of Science and Technology, Campus de Caparica, 2829-516 Caparica, Portugal.
Polymers
|January 28, 2026
概括
这项研究评估了3D打印的烯乙烯烯酸 (ASA),聚碳酸 (PC),聚胺12 (尼龙12) 和聚碳酸-烯乙烯 (PC-ABS) 聚合物的疲劳性能. 结果揭示了不同的机械性能和疲劳极限,这对于苛刻的生物机械应用至关重要.
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:
- 增材制造 (三维打印) 越来越多地用于复杂的组件,包括使用聚合物的生物机械应用.
- 对于许多3D打印的聚合物,疲劳数据有限,这阻碍了它们在需要循环负荷的应用中使用.
- 之前的研究评估了聚乳酸 (PLA) 和聚乙烯基四甲酸糖改性 (PETG) 的疲劳行为.
研究的目的:
- 为了研究3D打印的聚合物烯酸烯酸 (ASA),聚碳酸 (PC),聚胺12 (尼龙12) 和聚碳酸-烯酸-丁乙烯酸 (PC-ABS) 的疲劳行为.
- 描述高周期 (HCF) 和低周期 (LCF) 疲劳模式的S-N曲线.
- 建立疲劳极限,准静态机械性能和潜在的生物机械应用之间的关系.
主要方法:
- 实验性疲劳测试是在室温下对ASA,PC,尼龙12和PC-ABS的拉力样本进行的,拉力负载比 (R = 0.05).
- 特性包括拉力强度 (σR),Young的模量和终极应变的测量.
- 微计算机断层扫描 (micro-CT),热重力测量分析 (TGA),微分扫描热量测量 (DSC) 和富里埃变换红外光谱 (FTIR) 用于材料分析和孔隙性评估.
主要成果:
- 在测试的3D打印聚合物中观察到拉伸强度,模和终极应变的显著差异.
- 对于HCF和LCF方案,建立了S-N曲线,揭示了疲劳极限:ASA (8 MPa,25% × σr),PC (3.6 MPa,7% × σr),尼龙12 (7.4 MPa,17% × σr) 和PC-ABS (4.7 MPa,15% × σr).
- 材料的多孔性水平在4%至11%之间,微CT证实了这一点.
结论:
- 该研究为ASA,PC,尼龙12和PC-ABS提供了关键的疲劳性能数据,填补了现有文献中的空白.
- 疲劳极限和准静态机械性能之间的确定的关系为材料选择提供了预测能力.
- 这些发现支持对这些3D打印聚合物进行初步评估,以对潜在的生物力学应用进行初步评估,这些应用需要特定的耐疲劳性.
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