碳纤维填充聚四氟乙烯复合材料力学性能研究

Study on the Mechanical Property of Carbon Fiber-filled Polytetrafluoroethylene(PTFE) Composites

聚四氟乙烯由于其优良的耐腐蚀性,作为换热设备材料逐渐被人们重视,但是由于聚四氟乙烯本身的力学性能不佳,限制了其大规模应用。为了改善聚四氟乙烯本身的力学性能,考虑以聚四氟乙烯为基体材料添加力学性能优良的碳纤维,首先用理论公式计算添加不同比例的碳纤维后复合材料力学性能的指标,其次采用ANSYS有限元数值模拟方法,模拟了不同进口流速对改性前和改性后的PTFE材料板翅式换热器压力和速度的影响,并进行分析,所得的结论对优化聚四氟乙烯复合材料力学性能有一定的价值。

Owing to excellent corrosion resistance,PTFE is gradually being considered as heat exchange equipment material,but its poor mechanical properties have limited its large-scale application.In order to improve mechanical properties of PTFE,carbon fibers with excellent mechanical properties were added to matrix material of PTFE.Firstly, theoretical formula was used to calculate the index of mechanical properties of composite material with different proportions of carbon fibers,and then ANSYS numerical simulation was used to simulate the influence of different inlet flow rates on pressure and velocity of plate-fin heat exchanger before and after the modification of PTFE material The obtained conclusions have effect on optimizing mechanical properties of PTFE composite materials.