Experimental Study of Cortical Bone Microstructure and Its Toughening Mechanism

2019 International Conference on Advanced Electronic Materials, Computers and Materials Engineering

无线电电子学;计算机科学;材料科学

Wang, Xiaohan^1 ; Li, Dongxu^1 ; Hao, Rui^1

College of Aerospace Science and Engineering, National University of Defense Technology^1

关键词: Biomimetic design;    Cortical bone;    High toughness;    In-plane stress;    Loadbearing structure;    Mechanical environment;    Toughening mechanisms;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/563/3/032052/pdf
DOI  :  10.1088/1757-899X/563/3/032052

来源: IOP

【 摘 要 】

With the increasingly severe mechanical environment of the planetary detectors, fracture and failure are more likely to occur at their load-bearing structures. Therefore, it is urgent to improve the toughness of load-bearing structures. Because of the unique microstructures, goat tibia has remarkable toughness. In this investigation, firstly, the cortical bone of goat tibia was observed by SEM, and the characteristic microstructures were identified. Secondly, the cross section of cortical bone was loaded by long-term inplane stress, then the toughness of cortical bone in different regions were obtained based on the orientation and distribution of cracks after the load. Finally, the toughening mechanisms of cortical bone were discussed. This study of the cortical bone toughening mechanism can be helpful for the biomimetic design of high-toughness materials.