Micromechanical analysis of human hard-tissued teeth composite materials

• Main Authors: Han-Ren Huang, 黃漢仁
• Other Authors: Song-Jeng Huang
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/14188331978923373716

碩士 === 國立中正大學 === 機械系 === 99 === In the last decades, biomechanics research integrating biology and material mechanics grew to maturity rapidly. Only recently, with the development of nanoindentation instruments, it has been possible to investigate the size, shape and orientation of nanocrystalline micro-structural constituent material of bio-hard tissue (such as tooth). Therefore, the mechanical analysis and modeling of nanostructured bio-composite become a very important research topic. This research studies the microstructural mechanical model of the enamel, which would be established and evaluated with finite element method analysis. Using the basic mechanical theory of composite materials to investigate mechanical problem of bio-tissue could enhance the basic research of biomimetic composite materials. According to the results, exhibiting: (1) the different shapes of each contact surfaces between the enamel rods would affect the values of the normal stress which were reduced by the keyhole rod, and a curved surface could reduce the normal stress. (2) The sheath of enamel could absorb energy induced by shear stress, then to reduce the rod of enamel value of shear stress. (3) The tube of dentin had no significant effects to the tube’s trend of stress distribution. (4) The absorbing strain energy and viscoelastic property were decreased with increasing of angle.