石墨烯/羟基磷灰石复合材料力学性能的数值研究

为了研究石墨烯/羟基磷灰石复合材料力学性能（弹性模量和泊松比），开发了石墨烯/羟基磷灰石复合材料的随机分布模型自动生成算法及相应的计算程序；建立石墨烯/羟基磷灰石复合材料的有限元模型，计算添加不同质量分数的石墨烯对复合材料力学性能的影响，通过与实验数据对比验证算法的有效性.结果表明：添加0.25%~1.25%（质量分数）的石墨烯可使复合材料的弹性模量增加12%~50%，表明添加少量石墨烯即能有效地改善羟基磷灰石的力学性能.

Mechanical Properties of Graphene/Hydroxyapatite Composite Materials: Numerical Study

We study effect of addition of graphene on mechanical properties (elastic modulus and Poisson's ratio) of hydroxyapatite composites. Firstly, generating algorithm of random distribution geometric model of graphene/hydroxyapatite composites was created and model's automatic generation program was developed. Then, finite element model of graphene/hydroxyapatite composite was established. Finite element analysis of uniaxial tensile tests of composite materials was carried out. Finally, mechanical properties of different mass fraction of graphene of composite were calculated. Validity of the algorithm is verified by experimental data. It shows that elastic modulus of composite increased 12% to 50% with addition of 0.25% to 1.25% (wt.) graphene. Mechanical properties of hydroxyapatite can be effectively improved by addition of graphene.