3D打印连续纤维复合假肢接受腔Z向强化制造策略

doi:10.3901/JME.2022.07.267

机械工程学报 ›› 2022, Vol. 58 ›› Issue (7): 267-275.doi: 10.3901/JME.2022.07.267

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3D打印连续纤维复合假肢接受腔Z向强化制造策略

刘腾达^1,2, 汤磊^1,2, 孙畅宁^1,2, 单存清^1,2, 李涤尘^1,2, 田小永¹, 刘朝宗³, 王玲^1,2

1. 西安交通大学机械工程学院机械制造系统工程国家重点实验室西安 710049;2. 国家药品监督管理局医用增材制造器械研究与评价重点实验室西安 710054;3. 伦敦大学学院皇家骨科医院整形外科与骨肌科学研究所伦敦 HA7 4LP 英国

收稿日期:2021-09-10 修回日期:2022-02-16 出版日期:2022-04-05 发布日期:2022-05-20
通讯作者: 王玲(通信作者),女,1979年出生,博士,教授,博士研究生导师。主要研究方向为增材制造(3D打印),生物力学与生物仿生制造。E-mail:menlwang@xjtu.edu.cn
作者简介:刘腾达,男,1999年出生。主要研究方向为复合材料康复辅具的制造。E-mail:liutengda@aliyun.com
基金资助:
国家重点研发计划(2018YFE0207900)、广东省重点领域研发计划(2018B090906001)、国家重点研发计划(2018YFB1107000)、陕西省自然科学基础研究计划项目(2022JQ-378)、中国博士后科学基金项目(2020M683458)、英国工程和自然科学研究委员会(EPSRC)(No.EP/T517793/1)、中央高校基本科研业务费和陕西高校青年创新团队资助项目。

Z-direction Enhancing Manufacturing Strategy for 3D Printing Prosthetic Socket of Continuous Fiber Composite

LIU Tengda^1,2, TANG Lei^1,2, SUN Changning^1,2, SHAN Cunqing^1,2, LI Dichen^1,2, TIAN Xiaoyong¹, LIU Chaozong³, WANG Ling^1,2

1. State Key Laboratory for Manufacturing System Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049;2. NMPA Key Laboratory for Research and Evaluation of Additive Manufacturing Medical Devices, Xi'an 710054;3. Institute of Orthopaedic & Musculoskeletal, Royal National Orthopaedic Hospital, University College London, London HA7 4LP, UK

Received:2021-09-10 Revised:2022-02-16 Online:2022-04-05 Published:2022-05-20

摘要/Abstract

摘要： 假肢是截肢者恢复行动能力所必须的康复辅具，假肢接受腔作为连接残肢与假肢系统之间重要的生机界面，具有包容残肢、支撑体重、传递运动载荷的重要作用。与传统工艺制备的假肢接受腔相比，MEX(Material Extrusion，材料挤出成形)3D打印接受腔具有加工周期短，成本低等优势，能够满足接受腔快速低成本制造的需求，但该工艺制备的接受腔以Z向力学性能较差为突出劣势，应用也因此受到限制。之前的研究针对该问题提出了一系列的策略对MEX打印工艺的Z向力学性能进行提升，但受到材料与工艺限制，优化后的打印策略制备接受腔的Z向力学性能依然不足。为解决该问题，本研究首先基于假肢接受腔的打印需求，自主研发了可控制挤出头姿态变换的多自由度MEX打印设备。随后，本研究系统地研究了多自由度打印工况下纤维方向和打印层厚对芳纶纤维增强复合材料打印件Z向力学性能的影响。最后，本研究根据多步态下假肢接受腔的力学分析结果，将纤维方向和接受腔厚度等参数和接受腔受力状态进行关联，提出了接受腔Z向强化打印策略。结果表明，与传统3D打印工艺相比，Z向强化制造策略可显著提升接受腔的力学性能，所制备的假肢接受腔可满足穿戴疲劳要求。

关键词: 材料挤出成形, 假肢接受腔, Z向增强, 连续纤维, 力学性能

Abstract: The prosthetic socket is a necessary rehabilitation-aid equipment for lower limb amputees. As an important kind of human-machine interface between the residual limb and the prosthesis, the prosthetic socket plays an important role in containing the residual limb, supporting the body weight and transmitting the motion load. Compared with the prosthetic socket by conventional process, MEX-printing(material extrusion) prosthetic socket has the advantages of short processing period and low cost, which can meet the needs of rapid and low-cost manufacturing of prosthetic socket. However, the socket prepared by this process has a prominent disadvantage of poor Z-direction mechanical performance, which limited its application. To solve this problem, a series of strategies are proposed by previous studies to improve the Z-direction mechanical performance of MEX-printing process. Due to the limitations of materials and processes, the Z-direction mechanical performance of the sample prepared by the optimized printing strategy is still insufficient. In order to solve this problem, a multiaxial MEX printing equipment which can change the angle of extrusion head is developed based on the print requirements of the prosthetic socket. Then, the effect of fiber orthogonal-laying direction and the printing layer height on Z-direction mechanical properties of aramid fiber reinforced composites are systemically studied. Finally, parameters such as fiber direction and the thickness are correlated with the stress conditions of the prosthetic socket based on the mechanical analysis results of prosthetic socket during multi gait, then the Z-direction enhanced printing strategy of the prosthetic socket is proposed. The results showed that compared with the traditional 3D printing process, the Z-direction enhancing manufacturing strategy can significantly improve the mechanical properties of the prosthetic socket, which can meet the requirements of wearing fatigue property.

Key words: material extrusion, prosthetic socket, Z-direction enhancement, continuous fiber, mechanical property

中图分类号:

TD406

刘腾达, 汤磊, 孙畅宁, 单存清, 李涤尘, 田小永, 刘朝宗, 王玲. 3D打印连续纤维复合假肢接受腔Z向强化制造策略[J]. 机械工程学报, 2022, 58(7): 267-275.

LIU Tengda, TANG Lei, SUN Changning, SHAN Cunqing, LI Dichen, TIAN Xiaoyong, LIU Chaozong, WANG Ling. Z-direction Enhancing Manufacturing Strategy for 3D Printing Prosthetic Socket of Continuous Fiber Composite[J]. Journal of Mechanical Engineering, 2022, 58(7): 267-275.

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3D打印连续纤维复合假肢接受腔Z向强化制造策略

Z-direction Enhancing Manufacturing Strategy for 3D Printing Prosthetic Socket of Continuous Fiber Composite

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