Effect of the Design Constraints and the Loading Model on the Geometry of Topology Optimized Acetabular Cages

IF 1.3 Q3 ENGINEERING, MECHANICAL

PERIODICA POLYTECHNICA-MECHANICAL ENGINEERING Pub Date : 2022-07-15 DOI:10.3311/ppme.20238

Martin O. Dóczi, Róbert Sződy, P. Zwierczyk

{"title":"Effect of the Design Constraints and the Loading Model on the Geometry of Topology Optimized Acetabular Cages","authors":"Martin O. Dóczi, Róbert Sződy, P. Zwierczyk","doi":"10.3311/ppme.20238","DOIUrl":null,"url":null,"abstract":"The treatment of large acetabular bone defects is a challenging task for the clinical experts. One of the most important part is the selection or the design the most appropriate implant. The aim of the study is to explore the potential of topology optimization for the treatment of extensive pelvic bone defects. Using a finite element method, the authors investigate different design spaces and load cases. Sensitivity tests for the material characteristic of the bone and the constraint of the applied volume-fraction were performed. The results are topology-optimized acetabular cage concepts with similar designs. The conceptual designs are not sensitive to the changing of the elastic modulus of the bone and the volume-fraction constraint. The reason for the similarity between the designs is the close connections, they have a special role in maximizing the stiffness. With the use of our design space, a lot of bone grafts can be put behind the cage and it can give an idea for sheet metal conceptual designs. Due to the close connections, similar conceptual variants are generated under normal walking load, which can be used for faster calculations in similar cases.","PeriodicalId":43630,"journal":{"name":"PERIODICA POLYTECHNICA-MECHANICAL ENGINEERING","volume":"1 1","pages":""},"PeriodicalIF":1.3000,"publicationDate":"2022-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"PERIODICA POLYTECHNICA-MECHANICAL ENGINEERING","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3311/ppme.20238","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}

引用次数: 1

Abstract

The treatment of large acetabular bone defects is a challenging task for the clinical experts. One of the most important part is the selection or the design the most appropriate implant. The aim of the study is to explore the potential of topology optimization for the treatment of extensive pelvic bone defects. Using a finite element method, the authors investigate different design spaces and load cases. Sensitivity tests for the material characteristic of the bone and the constraint of the applied volume-fraction were performed. The results are topology-optimized acetabular cage concepts with similar designs. The conceptual designs are not sensitive to the changing of the elastic modulus of the bone and the volume-fraction constraint. The reason for the similarity between the designs is the close connections, they have a special role in maximizing the stiffness. With the use of our design space, a lot of bone grafts can be put behind the cage and it can give an idea for sheet metal conceptual designs. Due to the close connections, similar conceptual variants are generated under normal walking load, which can be used for faster calculations in similar cases.

查看原文本刊更多论文

设计约束和载荷模型对拓扑优化髋臼固定架几何形状的影响

髋臼骨缺损的治疗是临床专家面临的一项具有挑战性的任务。其中最重要的部分是选择或设计最合适的植入物。本研究的目的是探索拓扑优化治疗广泛骨盆骨缺损的潜力。采用有限元法，研究了不同的设计空间和荷载情况。对骨的材料特性和应用体积分数的约束进行敏感性试验。结果是具有相似设计的拓扑优化的髋臼笼概念。概念设计对骨弹性模量和体积分数约束的变化不敏感。两种设计的相似之处在于它们之间的紧密联系，它们在最大限度地提高刚度方面具有特殊的作用。利用我们的设计空间，可以在笼子后面放置大量的骨移植物，这可以为钣金概念设计提供一个思路。由于紧密的联系，在正常的步行负荷下产生了类似的概念变体，这可以用于在类似情况下更快的计算。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

PERIODICA POLYTECHNICA-MECHANICAL ENGINEERING ENGINEERING, MECHANICAL-

CiteScore

2.80

自引率

7.70%

发文量

审稿时长

20 weeks

期刊介绍： Periodica Polytechnica is a publisher of the Budapest University of Technology and Economics. It publishes seven international journals (Architecture, Chemical Engineering, Civil Engineering, Electrical Engineering, Mechanical Engineering, Social and Management Sciences, Transportation Engineering). The journals have free electronic versions.