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Reduction of Stress Variations on Sections (ROSVOS) for a Femoral Component
Iranian Journal of Science and Technology, Transactions of Mechanical Engineering ( IF 1.3 ) Pub Date : 2021-01-18 , DOI: 10.1007/s40997-020-00418-w
Levent Uğur , Burak Ozturk , Fehmi Erzincanli

Total knee prostheses have become established arthroplasty applications in the treatment of damaged or weakened cartilage. New implants are being produced using bio-materials which are compatible with human tissue. In the industry, these prostheses are modeled and manufactured in different design geometries. This study investigated using a novel method for an ideal geometry designed to prevent fracture problems caused by design errors and metallurgical weakness in femoral component geometry. This approach is presented in a flowchart demonstrating its implementation, orientation, and evaluation via finite element analysis. Unlike those in the literature, stress variations in the design surface cross sections were evaluated in this proposed design method, for different design types and angles. In this study, the design surface was divided into eight horizontal and ten vertical sections. The main objective of this study is to minimize the stress variations in these sections and to obtain the lowest possible volume value. As a result, stress exceeding the critical ratio was observed in four sections. In addition, three design parameters were found to be the most important for achieving maximum safety and minimum volume in this femoral component design. The method presented in this study aims to evaluate the ideal geometry of models and selection can be applied for the production of many industrial and biomechanical products.



中文翻译:

减少股骨成分的截面应力变化(ROSVOS)

全膝关节假体已成为公认的关节置换术,用于治疗软骨受损或减弱。正在使用与人体组织兼容的生物材料生产新的植入物。在工业中,这些假体以不同的设计几何形状建模和制造。本研究使用一种新颖的方法研究了理想的几何形状,该几何形状旨在防止由设计错误和股骨组件几何形状的冶金学缺陷引起的断裂问题。该方法以流程图的形式展示,通过有限元分析演示了其实现,方向和评估。与文献中的方法不同,该设计方法针对不同的设计类型和角度评估了设计表面横截面中的应力变化。在这个研究中,设计图面分为八个水平部分和十个垂直部分。这项研究的主要目的是使这些部分的应力变化最小化,并获得最低的体积值。结果,在四个部分中观察到超过临界比的应力。另外,在该股骨组件设计中,发现三个设计参数对于实现最大的安全性和最小的体积最重要。本研究中提出的方法旨在评估模型的理想几何形状,并且可以将其选择用于许多工业和生物机械产品的生产。在四个部分中观察到超过临界比率的应力。另外,在该股骨组件设计中,发现三个设计参数对于实现最大的安全性和最小的体积最重要。本研究中提出的方法旨在评估模型的理想几何形状,并且可以将其选择用于许多工业和生物机械产品的生产。在四个部分中观察到超过临界比率的应力。另外,在该股骨组件设计中,发现三个设计参数对于实现最大的安全性和最小的体积最重要。本研究中提出的方法旨在评估模型的理想几何形状,并且可以将其选择用于许多工业和生物机械产品的生产。

更新日期:2021-01-18
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