The Mechanical Properties and Modeling of Creep Behavior of UHMWPE/Nano-HA Composites
The Mechanical Properties and Modeling of Creep Behavior of UHMWPE/Nano-HA Composites
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DOI：
10.1007/s11665-017-2913-2
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发表时间：
2017-09
影响因子：
2.3
通讯作者：
Fan Li;Li-Lan Gao;Hong Gao;Yun Cui
中科院分区：
文献类型：
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作者：
Fan Li;Li-Lan Gao;Hong Gao;Yun Cui
制备了不同羟基磷灰石（HA）含量的超高分子量聚乙烯（UHMWPE）复合材料。在这里，复合材料的力学性能进行了检查，并评估HA颗粒对纯基体的时间依赖性行为的影响，复合材料在不同的应力水平下的蠕变和恢复性能也进行了研究。正如预期的那样，HA的添加影响了UHMWPE的时间依赖性响应，并且该效应对HA含量有很强的依赖性。随着HA含量的增加，复合材料的蠕变和回复应变显著降低，拉伸性能也受到损害，这是由于HA填料的浓度。通过扫描电镜分析了HA在UHMWPE基体中的分散机理和效果。此外，由于调整后参数的变化揭示了HA对UHMWPE基质蠕变行为的影响，因此采用Findley模型。结果表明，该解析模型对纯基体及其复合材料的蠕变预测是准确的。
Composites with different levels of hydroxyapatite (HA) content and ultra-high molecular weight polyethylene (UHMWPE) were prepared in this work. Mechanical properties of the composites were examined here, and to evaluate the effect of HA particles on the time-dependent behavior of the pure matrix, the creep and recovery performance of composites at various stress levels were also researched. As expected, the addition of HA influenced the time-dependent response of the UHMWPE and the effect had a strong dependence on the HA content. The creep and recovery strain of the composites significantly decreased with increasing HA content, and tensile properties were also impaired, which was due to the concentration of HA fillers. The mechanism and effect of HA dispersed into the UHMWPE matrix were examined by scanning electron microscopy. Additionally, since variations in the adjusted parameters revealed the impact of HA on the creep behavior of the UHMWPE matrix, Findley’s model was employed. The results indicated that the analytical model was accurate for the prediction of creep of the pure matrix and its composites.