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研究了“后期增容”技术制备的PP/a-PA66原位成纤复合材料在拉伸载荷下的力学特性,并建立了有限元模型,对其拉伸行为进行了数值模拟。与不添加增容剂的PP/PA66、直接将PP、PA66、SCRC熔融共混-热拉伸制备的PP/PA66/SCRC相比,PP/a-PA66的拉伸屈服应力最优,且与纯PP最为接近,这是因为其具有PA66异形微纤、强结合适度柔性界面的结构特征。拉伸力学行为的数值模拟曲线与试验曲线相似度较高,表明考虑材料属性的有限元模型可以较好地模拟原位成纤复合材料的拉伸力学特性。
The mechanical properties of PP / a-PA66 in-situ fiber-reinforced composites prepared under the technique of “post compatibilization” were studied under tensile load. The finite element model was established and the tensile behavior was numerically simulated. The tensile yield stress of PP / PA66 is the best compared with that of PP / PA66 without compatibilizer, PP / PA66 / SCRC with PP, PA66 and SCRC melt blending and hot stretching directly, The closest pure PP is due to its structural characteristics of PA66-shaped microfibers that are strongly bound to a moderately flexible interface. Tensile mechanical behavior of the numerical simulation curve and the test curve similarity, indicating that considering the material properties of the finite element model can better simulate the in-situ fiber-reinforced composite tensile mechanical properties.