Toparli M, Koksal N S
Department of Metallurgical and Materials Engineering, Faculty of Engineering, Dokuz Eylul University, Bornova, Izmir, Turkey.
Comput Methods Programs Biomed. 2005 Mar;77(3):253-7. doi: 10.1016/j.cmpb.2004.11.003.
The finite element method (FEM) is applied for studying the hardness (H) and yield strength (Y) of dentin subjected to a nano-indentation process. The nano-indentation experiments were simulated with the ABAQUS finite element software package. This test, performed with a spherical indenter, was simulated by axisymmetric finite element analysis. The load versus displacement was calculated during loading-unloading sequence for different elastic modulus (E) and yield strength. Hardness and maximum principal compressive and tensile stresses were plotted for different elastic modulus depending on yield strength. The dentin was assumed to be isotropic, homogenous and elasto-plastic. The theoretical results outlined in this study were compared with the experimental works reported in the literature and then hardness and yield strength of dentin was estimated.
采用有限元方法（FEM）研究牙本质在纳米压痕过程中的硬度（H）和屈服强度（Y）。使用ABAQUS有限元软件包对纳米压痕实验进行模拟。该测试采用球形压头进行，通过轴对称有限元分析进行模拟。在加载-卸载过程中，针对不同的弹性模量（E）和屈服强度计算载荷与位移。根据屈服强度，绘制不同弹性模量下的硬度以及最大主压应力和主拉应力。假设牙本质为各向同性、均匀且弹塑性的。将本研究概述的理论结果与文献中报道的实验工作进行比较，进而估算牙本质的硬度和屈服强度。
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