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Developing of load-bearing Bones Replacement Based on Cerium Compounds/Nano-hydroxyapatite Composites

Non-Metallic Material Science 2021年第2期3卷 46-48页

作者： S.M.Naga National Research Center Ceramics DepartmentDokkiCairoEgypt

The importance of implantable biomaterials is growing up in recent days for modern medicine,especially fixation,replacement,and regeneration of load-bearing bones.Through the past several years,metals,ceramics,polymers,and their composites,have been used for the reconstruction of hard tissues.Special standards such as adequate mechanical and biocompatible properties are required to avoid rejection reactions of the tissues.Recently,a number of novel advanced biomaterials are developed as promising candidates.Amongst those,cerium-based biomaterials acquired attention as a substitution material for hard tissues reconstruction because of cerium antioxidative properties,which enabled it to be used to decrease mediators of inflammation.In addition,the eminent mechanical properties,as well as the perfect chemical and biological compatibilities,make cerium-based biomaterials attractive for biomedical application.

关键词： Hard tissue load-bearing Biomaterials

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Design and Mechanical Characterization of an S-Based TPMS Hollow Isotropic Cellular Structure

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Computer Modeling in Engineering & Sciences 2022年第5期131卷 695-713页

作者： Junjian Fu Pengfei Sun Yixian Du Lei Tian Qihua Tian Xiangman Zhou College of Mechanical and Power Engineering China Three Gorges UniversityYichang443002China Hubei Key Laboratory of Hydroelectric Machinery Design&Maintenance Yichang443002China

Cellular structures are regarded as excellent candidates for lightweight-design,load-bearing,and energy-absorbing applications.In this paper,a novel S-based TPMS hollow isotropic cellular structure is proposed with both superior load-bearing and energy-absorbing performances.The hollow cellular structure is designed with Boolean operation based on the Fischer-Koch(S)implicit triply periodic minimal surfaces(TPMS)with different level parameters.The anisotropy and effective elasticity properties of cellular structures are evaluated with the numerical homogenization method.The finite element method is further conducted to analyze the static mechanical performance of hollow cellular structure considering the size effect.The compression experiments are finally carried out to reveal the compression properties and energy-absorption characteristics.Numerical results of the Zener ratio proved that the S-based hollow cellular structure tends to be isotropic,even better than the sheet-based Gyroid TPMS.Compared with the solid counterpart,the S-based hollow cellular structure has a higher elastic modulus,better load-bearing and energy absorption characteristics.

关键词： Hollow cellular structure triply periodic minimal surfaces isotropic property energy absorption load-bearing

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Residual Strength Study for Damaged Hull and Risk Analysis and Formal Safety Assessment

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Science Foundation in China 2002年第1期10卷 21-24,36页

作者： GuoChangjie LiJiangjun Zhang Daokun ZhouBinghuan(Dalian University of Technology, Dalian 116024)

Residual strength assessment and prediction has been introduced in the project studies, including the determination of risk failure scenario, the change law of structural capacity and load effects in the damage of ship structure, the models for structural response and ultimate strength analysis, and dynamical model of reliability assessment. In addition, the project has improved the calculation method of ship ultimate load -bearing capacity, and studied the change law, assessment criteria of residual strength, and the method of predicting lifetime for aging ships. The valuable conclusions have been obtained by a large number of engineering calculations. The project and its extended results can provide theoretical foundation and background condition to make risk rule and modem design system, and can implement risk analysis and formal safety assessment for the marine world. The results will improve design quality and shipping safety of ship and offshore and enhanced their society and economic benefits.

关键词： Residual Strength Reliability Assessment Ultimate load-bearing Capacity HOP FSA

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