Diagonal-symmetrical and Midline-symmetrical Unit Cells with Same Porosity for Bone Implan

Diagonal-symmetrical and Midline-symmetrical Unit Cells with Same Porosity for Bone Implant:

Mechanical Properties Evaluation

Jian Li;Diansheng Chen;Yingying Zhang;Yan Yao;Zhongjun Mo;Lizhen Wang;Yubo Fan

【期刊名称】《仿生工程学报（英文版）》 【年(卷),期】2024(016)003

【摘要】In this study,mechanical properties of bionic porous structures with diagonal-symmetrical and midline-symmetrical unit cells were studied when the porosities were same.Three typical unit cells (Diamond (DO),Rhombic Dodecahedron (RD),and Octet Truss (OT))were selected,in which DO has diagonal-symmetrical shape,while RD and OT share midline-symmetrical

structure.Based

on

the

same

porosity,corresponding models were designed,and Ti6A14V samples were manufactured by electron beam melting.Then,using Mechanical Properties Testing (MPT) and Finite Element Analysis (FEA) methodologies,mechanical properties and transmissions of different porous structures were evaluated.Besides,composition and details before and after printing were analyzed with Energy Dispersive Spectrometer (EDS),X-ray diffraction (XRD) and Scanning Electron Microscope (SEM).MPT results showed that midline-symmetrical shape would have superior compressive performance than diagonal-symmetrical

shape,but

opposite

trend

for

the

torsion

performance,which were in line with FEA

prediction.Furthermore,effective modulus of DO,RD and OT were 2.59 GPa,4.89 GPa,and 1.77 GPa,approximating the mechanical properties of human bones.Additionally,manufacturing defects and discrepancies between FEA and MPT were found.This study would provide great helps for unit cell selection and initial mechanical properties matching for optimum bone implants. 【总页数】12页(468-479) 【关键词】

【作者】Jian Li;Diansheng Chen;Yingying Zhang;Yan Yao;Zhongjun Mo;Lizhen Wang;Yubo Fan

【作者单位】Robotic Institute, Beihang University, Beijing 100191, China;Beijing Key Laboratory of Rehabilitation Technical Aids for Old-Age and Disability, and Key Laboratory of Rehabilitation Aids Technology and System of the Ministry of Civil Affairs, National Research Center for Rehabilitation Technical Aids,Beijing 100176, China;Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China;Robotic Institute, Beihang University, Beijing 100191, China;Beijing Advanced Innovation Center for Biomedical

Engineering,

Beihang

University,

Beijing

100191,

China;Beijing Key Laboratory of Rehabilitation Technical Aids for Old-Age and Disability, and Key Laboratory of Rehabilitation Aids

Technology and System of the Ministry of Civil Affairs, National Research Center for Rehabilitation Technical Aids,Beijing 100176, China;Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China;Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China;Beijing Key Laboratory of Rehabilitation Technical Aids for Old-Age and Disability, and Key Laboratory of Rehabilitation Aids Technology and System of the Ministry of Civil Affairs, National Research Center for Rehabilitation Technical Aids,Beijing 100176, China;Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China;Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China;Beijing Key Laboratory of Rehabilitation Technical Aids for Old-Age and Disability, and Key Laboratory of Rehabilitation Aids Technology and System of the Ministry of Civil Affairs, National Research Center for Rehabilitation Technical Aids,Beijing 100176, China;Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China;Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing