生物启发的辅助性元材料内和穿关节假肢插座:能量吸收和应力再分配
Mahdi Bodaghi1, Saman Jolaiy1, Kaveh Rahmani1
1Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham, NG11 8NS, UK.
Journal of the mechanical behavior of biomedical materials
|December 9, 2025
概括
以为灵感的新型辅助性超材料通过显著减少跨内和插座的接口应力来提高假肢舒适性. 这种生物灵感设计增强了压力再分配和能源管理,以获得更好的患者结果.
科学领域:
- 生物材料工程 生物材料工程
- 机械工程 机械工程
- 整形器械和假肢
背景情况:
- 假肢舒适度受到残余肢体,内和插座之间的负载分布的显著影响.
- 传统的假肢接口在优化压力和能源管理方面经常面临挑战.
研究的目的:
- 引入和评估一种新的,以为灵感的辅助性元材料,用于跨假肢和插座.
- 与传统材料相比,评估区域特定和完全辅助性的设计在改善接口应力分布和能量吸收方面的有效性.
主要方法:
- 辅助性超材料格子是使用患者特定的CT / 3D扫描设计的,并且由TPU (外) 和PA-12 (插座) 增材制造.
- 进行了循环压缩实验,以校准材料模型.
- 进行了有限元分析,以量化辅助和传统设计的接口应力和能量指标.
主要成果:
- 与/EL50基线相比,四区辅助性TPU层降低了高达60%的峰值应力,完全辅助性层降低了高达65%的峰值应力.
- 与ABS相比,辅助性PA-12插座设计减少了40-45%的峰值应力,全辅助性插座减少了高达80%的峰值应力,并增加了特定能量吸收.
- 经过验证的工作流集成成像,格子设计,增材制造,测试和模拟患者特定的假肢接口.
结论:
- 生物启发的辅助性超材料,当整合到假肢和插座中时,有效地改善了压力再分配和质量高效的能源管理.
- 开发的工作流程证明了与多喷气融合的兼容性,使患者特定的假肢接口具有临床翻译的潜力.
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