自强复合材料:摩擦分析及其对假肢插座设计的影响
Yogeshvaran R Nagarajan1,2, Yasasween Hewavidana3, Emrah Demirci3
1School of Engineering and Sustainable Development, De Montfort University, The Gateway, Leicester LE1 9BH, UK.
Materials (Basel, Switzerland)
|November 27, 2024
概括
这项研究评估了用于假肢插座的自强化聚合物 (SrPs). 虽然普通塑料的摩擦力较低,但SrPET的摩擦力和磨损率很低,这表明了可持续假肢设计的潜力.
科学领域:
- 生物材料工程 生物材料工程
- 部落学 (tribology) 是一个学科.
- 聚合物科学 聚合物科学
背景情况:
- 假肢插座对于下肢假肢至关重要,传统上由散装聚合物或纤维增强复合材料制成.
- 现有材料在可访问性,负担能力和可持续性方面面临挑战,特别是在资源有限的环境中.
- 自强化聚合物复合材料 (SRPC) 提供了潜在的可持续替代品.
研究的目的:
- 研究SRPCs的三元学行为,包括聚乳酸 (PLA),聚乙烯四甲酸 (PET),玻璃纤维 (GF) 和碳纤维 (CF).
- 为了比较SRPC的摩擦和磨损特性与通常使用的材料,如高密度聚乙烯 (HDPE) 和聚烯 (PP).
- 根据SRPC的耐用性和耐磨性来评估SRPC适用于假肢插座应用的适用性.
主要方法:
- 对各种SRPC (SrPLA, SrPET, SrGF, SrCF) 和常规聚合物 (HDPE, PP) 进行了实验摩擦测试.
- 在不同的负载和旋转速度下进行了测试,以评估摩擦系数 (COF).
- 使用显微镜分析来评估磨损深度,并检查对照表面 (钢球) 上的碎片形成.
主要成果:
- HDPE和PP的COF比所有测试的SRPC都低.
- 在测试条件下,SrPLA记录了最高的平均COF (0.45),而SrPET显示了最低的 (0.15).
- 磨损分析表明,SrPLA的磨损最为显著,其次是SrCF,SrGF和SrPET. 来自加强的碎片粘附在钢球上,影响COF.
结论:
- 由于其低的COF,SrPET显示出作为假肢插座的耐用和耐磨材料的潜力.
- 虽然传统的聚合物具有较低的摩擦力,但SRPC为更可持续的假肢解决方案提供了一条道路.
- 部落学分析对于优化假肢插座设计至关重要,需要对皮肤接触场景进行进一步研究.
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