CF/PEEK钻削热历史对孔承载能力的影响规律研究  

Study on Effect of Drilling Thermal History on Bearing Capacity of CF/PEEK Composites

作　　者：李丰辰 齐振超[1] 陈文亮[1] 姚晨熙 孙家豪 Li Fengchen;Qi Zhenchao;Chen Wenliang;Yao Chenxi;Sun Jiahao(College of Mechanical&Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210000,China;不详)

机构地区：[1]南京航空航天大学机电学院,南京市210000 [2]航空工业南京机电液压工程研究中心航空机电系统综合航空科技重点实验室

出　　处：《工具技术》2022年第12期56-63,共8页Tool Engineering

基　　金：国家自然科学基金(52275434);基础加强计划技术领域基金(2019-JCJQ-JJ-341)。

摘　　要：碳纤维增强聚醚醚酮(CF/PEEK)热塑性复合材料因其优越的性能在航空领域有逐渐替代热固性复合材料的趋势。由于热塑性基体的力学性能受温度影响显著,其制孔不同于传统热固性材料。为阐明PEEK基体冷却再结晶过程给孔质量带来的影响,建立考虑孔周热历史的CF/PEEK双搭接拉伸有限元模型,根据温度监测信息对应不同的结晶度,对孔周轴—径向区域进行划分,并测定所需基础材料参数,分析了孔受载时的孔周轴—径向不同位置的力学响应和材料损伤,探究了树脂温变特性对孔承载能力的影响机理,通过对比仿真结果与试验结果,验证了仿真方法的可靠性。Carbon fiber reinforced polyether ether ketone matrix composite(CF/PEEK)has a broad application prospect in aviation manufacturing industry due to its high performance,but unlike thermosetting carbon fiber reinforced composite materials(CFRP),the CF/PEEK matrix polyether ether ketone(PEEK)is a semicrystalline polymer,the cooling process of the high temperature area around in the hole changes the crystallinity of the resin,which affects the mechanical properties of the material.In order to clarify the influence of this process on hole quality,CF/PEEK component finite element model considering the thermal history of the hole is established.According to the temperature monitoring information,the axial and radial region of the hole is divided into equal strength and the double lap tensile simulation is carried out.The mechanical response and material damage of the hole under load are analyzed.The relationship between the cooling process after hole making and the service performance of CF/PEEK loaded hole is characterized,and it is confirmed that the tensile performance of CF/PEEK loaded hole can be predicted effectively by simulation based on the known circumferential axial-radial thermal history of the hole.

关 键 词：热塑性复合材料 制孔 钻削热 孔承载能力 

分 类 号：TG52[金属学及工艺—金属切削加工及机床] TH161[机械工程—机械制造及自动化] V258.3[一般工业技术—材料科学与工程]