Influence of interphase layer on the overall elasto-plastic behaviors of HA/PEEK biocomposite
Influence of interphase layer on the overall elasto-plastic behaviors of HA/PEEK biocomposite
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DOI：
10.1016/j.biomaterials.2003.12.050
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发表时间：
2004-10-01
期刊：
影响因子：
14
通讯作者：
Chow, CL
中科院分区：
文献类型：
--
作者：
Fan, JP;Tsui, CP;Chow, CL
为研究羟基磷灰石(HA)增强聚醚醚酮(PEEK)生物复合材料的力学性能，设计并建立了三维有限元单胞模型。该模型由弹脆羟基磷灰石球形颗粒、弹塑性基质和颗粒与基质之间的界面层组成。考虑了具有四种不同材料行为的界面层，考察了它们对复合材料整体性能的影响。此外，还考虑了基体和界面层的损伤演化以及界面失效。文中还讨论了网格敏感性、加载速度和质量比例尺等因素。使用通用有限元软件包ABAQUS结合用户自定义材料子程序进行分析。将预测结果与已有文献的实验数据进行了比较。用考虑基质降解和损伤失效对界面层影响的胞元模型预测的结果与实验结果吻合较好。因此，我们提出的细胞模型结合适当类型的界面层来模拟颗粒生物复合材料的力学性能的适用性可以得到验证。(C)2004爱思唯尔有限公司。保留所有权利。
A three-dimensional finite element unit cell model has been designed and constructed for studying mechanical properties of hydroxyapatite (HA) reinforced polyetheretherketone (PEEK) biocomposite. The model consists of an elastic-brittle HA spherical particle, an elasto-plastic matrix and an interphase layer between the particle and the matrix. The interphase layers with four different kinds of material behaviors have been taken into consideration to examine their effects on the overall properties of the composite. The damage evolution in the matrix and the interphase layer, and the interface failure, were also taken into account. Some other factors, such as mesh sensitivity, loading velocity and mass scale scheme, were also discussed in this investigation. A general-purpose finite element software package, ABAQUS, incorporated with a user-defined material subroutine, was used to perform the analysis. The predicted results were compared with the experimental data obtained from existing literatures. The results predicted by using the cell model with consideration of the matrix degradation and the effects of the damage and failure on the interphase layer are in good agreement with the experimental ones. Hence, the suitability of our proposed cell model incorporated with an appropriate type of the interphase layer for modeling the mechanical properties of the particulate biocomposite could be verified. (C) 2004 Elsevier Ltd. All rights reserved.