The designable elastic modulus of 3-D fabric reinforced biocomposites
The designable elastic modulus of 3-D fabric reinforced biocomposites
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DOI：
10.1016/j.matlet.2006.04.057
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发表时间：
2007-01-01
影响因子：
3
通讯作者：
Xu, Ke-Wei
中科院分区：
文献类型：
--
作者：
Fu, Tao;Zhao, Jun-Liang;Xu, Ke-Wei
三维（3-D）碳纤维织物用于增强羟基磷灰石（HA）/环氧树脂生物复合材料。采用刚度平均法和有限元法对三维织物增强复合材料的弹性模量进行了计算，结果表明，该复合材料的弹性模量具有可设计性，通过改变织物的微观结构参数，可以将弹性模量调节到人体皮质骨的弹性模量范围（7-30 GPa），以满足复合材料植入体的各向异性要求。计算的弹性模量与树脂传递模塑法制备的三维织物增强复合材料的弯曲模量相当。HA的加入降低了复合材料的弯曲模量，但其弯曲模量（22-36 GPa）仍接近于人皮质骨的弯曲模量，有利于避免高弹性模量植入材料引起的应力遮挡和骨吸收。(c)2006 Elsevier B.V保留所有权利。
The three-dimensional (3-D) carbon fiber fabric is used to reinforce a hydroxyapatite (HA)/epoxy biocomposite. The elastic modulus calculation of the 3-D fabric reinforced composite by the stiffness average method and the finite element method shows that the elastic modulus of the composite is designable, and can be adjusted to the range of a human cortical bone (7-30 GPa) by varying the micro-structural parameters of the woven fabric to fulfill the nonisotropic requirement of the composite implants. The calculated elastic modulus is comparable with the flexural modulus of the 3-D fabric reinforced composites prepared by resin transfer molding. The incorporation of HA has decreased the flexural modulus of the composites for the weakened fiber-matrix interface, but the flexural modulus (22-36 GPa) is still close to that of the human cortical bone, which favors the avoidance of 'stress shielding' and the sequent bone absorption caused by implant materials with a high elastic modulus. (c) 2006 Elsevier B.V All rights reserved.