经股截肢者膝关节的设计与分析

M. U. Qadir, Muhammad Awais Khan, Muzammal Hussain, Izhar ul Haq, Nizar Akhtar, Km Shah
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引用次数: 0

摘要

下肢截肢不仅会降低活动能力,而且会导致生活质量的严重损害。在过去的十年中,基于微处理器的经股膝关节不仅可以修复化妆品,还可以提供与真实肢体相当的功能。这种装置的关键问题之一是选择合适的材料来制造膝关节,以尽量减少在各种载荷条件下失效的机会,同时确保膝关节的重量在可接受的范围内。本研究的目的是设计一个基于微处理器的膝关节,并对不同材料进行各种静力结构分析,以优化所提出的设计的强度重量比。首先,在SolidWorks中开发了基于微处理器的膝关节模型,然后在Ansys Workbench中进行位移研究和非米塞斯应力计算。分析中使用的不同材料包括普通碳钢,不锈钢304,铝6061。结果表明,铝6061不仅减轻了膝关节的重量,而且变形和应力值都在可接受的范围内,是制造膝关节的合适材料。6061铝合金的最小Von Mises应力为559.9 Pa,最大Von Mises应力为71.37 MPa,抗拉强度为313 MPa。
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Design and Analysis of Knee Joint for Transfemoral Amputees
Lower limb amputation not only reduces mobility but also results in significant impairment in quality of life. Microprocessor based transfemoral knee joints have gained significant importance in the last decade to not only restore cosmetics but also provide functionality comparable to real limb. One of the key issues in such devices is selection of the suitable material for manufacturing of knee joint to minimize chances of failure under various loading conditions, while at the same time ensuring the weight of the knee is within acceptable limits. The purpose of this research is to design a microprocessor-based knee joint and perform various static structural analysis for different materials to optimize strength to weight ratio of the proposed design. Initially, a model for the proposed microprocessor-based knee was developed in SolidWorks followed by displacement study and computation of von-mises stresses in Ansys Workbench. Different materials used in the analysis include Plain Carbon Steel, Stainless Steel 304, Aluminum 6061. Based on the results Aluminum 6061 was identified as a suitable material for manufacturing knee joint as it not only reduces weight of the knee joint but also the deformation and stress values are within acceptable limits. The minimum and maximum Von Mises stress of Aluminum 6061 was 559.9 Pa and 71.37 MPa respectively with tensile strength of 313 MPa.
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