Crack propagation in TPMS scaffolds under monotonic axial load: Effect of morphology

IF 1.7 4区 医学 Q3 ENGINEERING, BIOMEDICAL
Aleksandr Shalimov , Mikhail Tashkinov , Ksenia Terekhina , Nataliya Elenskaya , Ilia Vindokurov , Vadim V. Silbersсhmidt
{"title":"Crack propagation in TPMS scaffolds under monotonic axial load: Effect of morphology","authors":"Aleksandr Shalimov ,&nbsp;Mikhail Tashkinov ,&nbsp;Ksenia Terekhina ,&nbsp;Nataliya Elenskaya ,&nbsp;Ilia Vindokurov ,&nbsp;Vadim V. Silbersсhmidt","doi":"10.1016/j.medengphy.2024.104235","DOIUrl":null,"url":null,"abstract":"<div><p>In this paper, the mechanical behaviour and failure of porous additively manufactured (AM) polylactide (PLA) scaffolds based on the triply periodic minimal surfaces (TPMS) is investigated using numerical calculations of their unit cells and representative volumes. The strain-amplification factor is chosen as the main parameter, and the most critical locations for failure of different types of scaffold structures are evaluated. The results obtained are presented in comparison with a multiple-crack-growth algorithm using the extended finite element method (XFEM), underpinned by the experimentally obtained fracture properties of PLA. The effect of morphology of TPMS structures on the pre-critical, critical and post-critical behaviours of scaffolds under monotonic loading regimes is assessed. The results provide an understanding of the fracture behaviour and main risk points for crack initiation in structures of AM-PLA scaffolds based on typical commonly used types of TPMS, as well as the influence of structure type and external load on this behaviour.</p></div>","PeriodicalId":49836,"journal":{"name":"Medical Engineering & Physics","volume":"132 ","pages":"Article 104235"},"PeriodicalIF":1.7000,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Medical Engineering & Physics","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S135045332400136X","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, BIOMEDICAL","Score":null,"Total":0}
引用次数: 0

Abstract

In this paper, the mechanical behaviour and failure of porous additively manufactured (AM) polylactide (PLA) scaffolds based on the triply periodic minimal surfaces (TPMS) is investigated using numerical calculations of their unit cells and representative volumes. The strain-amplification factor is chosen as the main parameter, and the most critical locations for failure of different types of scaffold structures are evaluated. The results obtained are presented in comparison with a multiple-crack-growth algorithm using the extended finite element method (XFEM), underpinned by the experimentally obtained fracture properties of PLA. The effect of morphology of TPMS structures on the pre-critical, critical and post-critical behaviours of scaffolds under monotonic loading regimes is assessed. The results provide an understanding of the fracture behaviour and main risk points for crack initiation in structures of AM-PLA scaffolds based on typical commonly used types of TPMS, as well as the influence of structure type and external load on this behaviour.

单调轴向载荷下 TPMS 支架的裂纹扩展:形态的影响
本文通过对多孔聚乳酸(PLA)支架的单元格和代表体积进行数值计算,研究了基于三周期极小表面(TPMS)的多孔添加剂制造(AM)支架的机械性能和失效。应变放大系数被选为主要参数,并评估了不同类型支架结构失效的最关键位置。在实验获得的聚乳酸断裂特性的支持下,将获得的结果与使用扩展有限元法(XFEM)的多裂缝生长算法进行了比较。评估了 TPMS 结构的形态对单调加载条件下支架的临界前、临界和临界后行为的影响。研究结果有助于了解基于典型常用 TPMS 类型的 AM-PLA 支架结构的断裂行为和裂纹萌发的主要风险点,以及结构类型和外部载荷对这种行为的影响。
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
Medical Engineering & Physics
Medical Engineering & Physics 工程技术-工程:生物医学
CiteScore
4.30
自引率
4.50%
发文量
172
审稿时长
3.0 months
期刊介绍: Medical Engineering & Physics provides a forum for the publication of the latest developments in biomedical engineering, and reflects the essential multidisciplinary nature of the subject. The journal publishes in-depth critical reviews, scientific papers and technical notes. Our focus encompasses the application of the basic principles of physics and engineering to the development of medical devices and technology, with the ultimate aim of producing improvements in the quality of health care.Topics covered include biomechanics, biomaterials, mechanobiology, rehabilitation engineering, biomedical signal processing and medical device development. Medical Engineering & Physics aims to keep both engineers and clinicians abreast of the latest applications of technology to health care.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信