四川轻化工大学学报（自然科学版）2025，Vol.38Issue(2)：1-9,9.DOI:10.11863/j.suse.2025.02.01
碳纤维增强PEEK复合材料循环变形的实验研究
Experimental Study on Cyclic Deformation of Carbon Fiber-reinforced PEEK Matrix Composites
摘要
Abstract
Thermoplastic composites,such as carbon fiber-reinforced polyether-ethe-ketone(PEEK)matrix composites,have been widely used in aerospace hot-end structures in recent years,and the related components are usually subjected to cyclic loading during service,so it is necessary to carry out experimental studies on the cyclic deformation behavior of the materials in order to ensure the safety of the components in use.The average stress relaxation and ratcheting behavior of carbon fiber-reinforced PEEK matrix composites(T700/PEEK)with different fiber orientations at 0°,45°,and 90° are systematically studied by monotonic tensile,stress-controlled cycling and strain-controlled cycling experiments.It is shown that the monotonic tensile stress-strain curves of three components with different fiber angle has large difference,and the elastic modulus of the fiber with an orientation at 0° is about 11 times that of the fiber with an orientation at 90°.Under asymmetric strain loading conditions,the composites behave average stress relaxation phenomenon,and the average stress decreased rapidly during the first 20 cycles until it began to stabilize after 100 cycles.The fiber orientation and the given strain amplitude as well as the magnitude of the average strain are important factors affecting the average stress relaxation phenomenon.Under asymmetric stress loading conditions,the composites show ratcheting behavior,which is anisotropic.The peak stress during tension-unloading,stress amplitude,average stress,and stress ratio during asymmetric tension-compression all have greater influences on ratcheting behavior of the composites,which also shows obvious rate dependence.关键词
聚醚醚酮复合材料/循环载荷/平均应力松弛/棘轮行为/率相关Key words
polyether-ether-ketone matrix composites/cyclic loading/mean stress relaxation/ratcheting behavior/rate dependence分类
数理科学引用本文复制引用
张子涛,宋志诚,张娟..碳纤维增强PEEK复合材料循环变形的实验研究[J].四川轻化工大学学报（自然科学版）,2025,38(2):1-9,9.基金项目
四川省自然科学基金项目(2022NSFSC0312) （2022NSFSC0312）
