Large deflection deformation behavior of a Zr-based bulk metallic glass for compliant spinal fixation application

doi:10.1016/j.jmst.2023.07.021

IMR OpenIR

	Large deflection deformation behavior of a Zr-based bulk metallic glass for compliant spinal fixation application
	Li, Diao-Feng; Bai, Chun-Guang; Zhang, Zhi-Qiang; Zhang, Hui-Bo; Li, Nan; Zhao, Jian
通讯作者	Bai, Chun-Guang(cgbai@imr.ac.cn) ; Li, Nan(nli@imr.ac.cn)
	2024-02-20
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	173 页码:86-99
摘要	A novel compliant spinal fixation designed based on the concept of compliant mechanisms can reduce the stress-shielding effect and adjacent segment degeneration (ASD) effectively, but propose higher requirements for the properties of the used materials. Bulk metallic glasses (BMGs), as a kind of young biomaterials, exhibiting excellent comprehensive properties, which are attractive for compliant spinal fixation. Here, according to the practical service condition of the basic elements in compliant spinal fixation, large deflection deformation behaviors of Zr61Ti2Cu25Al12 (at.%, ZT1) BMG beam, including elastic, yielding and plastic were investigated systematically. It was shown that the theoretical nonlinear analytical solution curve as the benchmark not only with the capacity to predict the nonlinear load-deflection relation within the elastic deformation regime, but also assists to capture the yielding event roughly, which can be used as a powerful design tool for engineers. To capture the beginning of the yielding event exactly, bending proof strength (sigma p,0.05%) accompanied with tiny permanent strain of 0.05% was proposed and determined for BMGs in biomedical implant applications, which is of significance for setting the allowable operating limits of the basic flexible elements. By approach of interrupted loading-unloading cycles, plastic deformation driven by the bending moment can be classified into two typical stages: the initial stage which mainly characterized by the nucleation and intense interaction of abundant shear bands when the plastic strain below the critical value, and the second stage which dominated by the progressive propagation of shear bands and coupled with the emergence of shear offsets on tensile side. The plasticity of BMG beam structures depends on the BMG's inherent plastic zone size (rp). When the half beam thick-ness less than that of the rp, the plastic deformation of BMGs will behave in a stable manner, which can be acted as the margin of safety effectively.(c) 2023 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	Metallic glasses Biomaterials Compliant spinal fixation Large deflection deformation Plastic deformation
资助者	National Key Research and Development Program of China ; Research & Developement Program of the CAS-WEGO Group
DOI	10.1016/j.jmst.2023.07.021
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2017YFB0306201] ; Research & Developement Program of the CAS-WEGO Group
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001087519200001
出版者	JOURNAL MATER SCI TECHNOL
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/177883
专题	中国科学院金属研究所
通讯作者	Bai, Chun-Guang; Li, Nan
作者单位	Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Li, Diao-Feng,Bai, Chun-Guang,Zhang, Zhi-Qiang,et al. Large deflection deformation behavior of a Zr-based bulk metallic glass for compliant spinal fixation application[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2024,173:86-99.
APA	Li, Diao-Feng,Bai, Chun-Guang,Zhang, Zhi-Qiang,Zhang, Hui-Bo,Li, Nan,&Zhao, Jian.(2024).Large deflection deformation behavior of a Zr-based bulk metallic glass for compliant spinal fixation application.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,173,86-99.
MLA	Li, Diao-Feng,et al."Large deflection deformation behavior of a Zr-based bulk metallic glass for compliant spinal fixation application".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 173(2024):86-99.