摘要
针对人工韧带在膝关节腔内复杂力学环境作用下出现移植失效的问题,研制了一种人工韧带疲劳测试装置,由拉伸运动模块、扭转运动模块、屈曲运动模块和恒温液体回流系统组成。通过筛选人体正常行走过程中拉伸位移、扭转角度及屈曲角度等参数对人工韧带试样进行疲劳测试以及耐疲劳性能评价。结果表明:纤维和纱线之间的相互摩擦损伤是人工韧带试样的主要疲劳损伤模式,其拉伸断裂性能在疲劳测试后有一定的损失,归一化的拉伸模量随时间以指数函数形式下降;试样中各条大分子链在疲劳测试过程中会受到拉、压、扭、弯等一系列多个方向载荷的共同破坏作用,最终导致结晶度下降。
Aiming at the graft failure of artificial ligaments under complex mechanical environment in the knee joint cavity,an artificial ligament fatigue testing device was built,composing of a tensile motion module,a torsion motion module,a flexion motion module and an insulation temperature liquid return system.Clinical physiological parameters such as tensile displacement,torsion angle and flexion angle of the human body during normal walking were selected for fatigue tests and evaluation of fatigue resistance of artificial ligament specimens.The results showed that the friction damage between fibers and yarns was the main fatigue damage mode of the specimens and the tensile property of the specimens suffered some loss after fatigue and the normalized tensile modulus decreased exponentially with time.The macromolecular chains of the specimens were subjected to a series of multi-directional loads such as tension,compression,torsion and flexion during the fatigue test,which ultimately led to a decrease in crystallinity.
作者
卢俊
管晓宁
林婧
劳继红
王富军
李彦
王璐
LU Jun;GUAN Xiaoning;LIN Jing;LAO Jihong;WANG Fujun;LI Yan;WANG Lu(College of Textiles, Donghua University, Shanghai 201620, China;Key Laboratory of Textile Science & Technology of Ministry of Education, Donghua University, Shanghai 201620, China)
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2021年第11期71-76,共6页
Journal of Textile Research
基金
国家重点研发计划项目(2018YFC1106200,2018YFC1106201)
高等学校学科创新引智计划资助项目(BP0719035)
中央高校基本科研业务费专项基金资助项目(20D110128/001)。
关键词
人工韧带
疲劳测试
韧带移植物
耐疲劳性能
医用纺织品
artificial ligament
fatigue test
ligament graft
fatigue resistance
medical textiles
作者简介
第一作者:卢俊(1996—),男,硕士生,主要研究方向为人工韧带的生物力学性能评价;通信作者:林婧(1986—),女,高级实验师,博士,主要研究方向为生物医用纺织品的制备技术和表征方法,E-mail:jlin@dhu.edu.cn。
