高性能下肢假肢的有限元分析与拓扑优化

T. Bountourelis, N. Kladovasilakis, K. Tsongas, P. Kyratsis, D. Tzetzis
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引用次数: 0

摘要

由于增材制造技术的最新发展,现在可以实现快速制造具有高几何复杂性的全功能定制产品,而不受传统制造技术(如机械加工)的限制。本文根据国际标准和已有文献的推荐,设计了一种带膝关节的下肢假肢。通过有限元分析研究了假肢在实际操作条件下的力学行为,并检测了应力集中区。在本分析中,采用镍合金718作为建筑材料。在广泛的文献回顾后,所施加的载荷是根据75kg的人体体重得出的。然后,采用增材制造设计(DfAM)技术进行设计优化,以最大限度地减少装配零件的数量并改善物体的形状。此外,为了开发轻量级假肢,进行了拓扑优化过程,与原始设计相比,其质量减少了67%。值得一提的是,由于安全系数计算为1.22,因此在不影响部件结构完整性的情况下实现了显着的重量减轻。
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FINITE ELEMENT ANALYSIS AND TOPOLOGY OPTIMIZATION OF A HIGH-PERFORMANCE LOWER PROSTHETIC LIMB
Due to the recent development of additive manufacturing technologies, it is now possible to achieve rapid fabrication of fully functional customized products with high geometric complexity and without the constraints of traditional manufacturing techniques, such as machining. In the current paper, a lower prosthetic limb with the knee joint was designed according to the international standards and the recommendations from existing literature. Finite element analyses were performed to investigate the mechanical behavior of the prosthetic limb and detect the stress concentration regions under realistic operation conditions. For this analysis, Nickel alloy 718 was employed as a construction material. The applied loads were derived for a human body weight of 75kg after an extensive literature review. Then, design optimization was applied, employing design for additive manufacturing (DfAM) techniques in order to minimize the number of assembly parts and improve the shape of the object. Moreover, topology optimization processes were performed in order to develop a lightweight prosthetic limb and achieve a mass reduction of 67% compared to the original design. It is worth mentioning that, this remarkable weight reduction was attained without compromising the structural integrity of the part, as the factor of safety was calculated at 1.22.
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来源期刊
International Journal of Modern Manufacturing Technologies
International Journal of Modern Manufacturing Technologies Engineering-Industrial and Manufacturing Engineering
CiteScore
0.70
自引率
0.00%
发文量
15
期刊介绍: The main topics of the journal are: Micro & Nano Technologies; Rapid Prototyping Technologies; High Speed Manufacturing Processes; Ecological Technologies in Machine Manufacturing; Manufacturing and Automation; Flexible Manufacturing; New Manufacturing Processes; Design, Control and Exploitation; Assembly and Disassembly; Cold Forming Technologies; Optimization of Experimental Research and Manufacturing Processes; Maintenance, Reliability, Life Cycle Time and Cost; CAD/CAM/CAE/CAX Integrated Systems; Composite Materials Technologies; Non-conventional Technologies; Concurrent Engineering; Virtual Manufacturing; Innovation, Creativity and Industrial Development.
期刊最新文献
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