复合材料科学与工程Issue(8)：54-65,12.DOI:10.19936/j.cnki.2096-8000.20250828.007
2.5D编织石英/酚醛复合材料高温拉伸性能与损伤演化
Tensile properties and damage evolution of a 2.5D braided quartz/phenolic composite at elevated temperatures
摘要
Abstract
Quartz/phenolic composite is a kind of thermal protection material widely used in aerospace vehicles.The study of its high temperature tensile properties and damage mechanism is of great value to the application of res-in-based thermal protection materials.To this end,this paper tested the tensile properties of a 2.5D braided quartz/phenolic composite(2.5D-SiO2f/phenolic),and the test temperature range was from room temperature to 800℃.Acoustic emission technology is used to dynamically monitor the damage evolution of tensile specimens at room tem-perature,combined with scanning electron microscope to observe the fracture morphology,and analyze its tensile damage mechanism.The results show that the tensile strength at room temperature can reach 275 MPa and the mod-ulus can reach 17 GPa.In the range of room temperature to 800℃,the tensile properties of 2.5D-SiO2f/phenolic gradually decrease with increasing temperature.It is revealed that during the 2.5D-SiO2f/phenolic stretching process,there are mainly damage signals in the frequency range of 70～100 kHz,220～270 kHz,300～330 kHz,corresponding to the three damage modes of matrix cracking,fiber and matrix debonding,and fiber fracture.In this way,the evolution process of tensile damage is analyzed.关键词
2.5D编织石英/酚醛/拉伸性能/损伤演化/声发射/复合材料Key words
2.5D-SiO2f/phenolic/tensile properties/damage evolution/acoustic emission/composites分类
通用工业技术引用本文复制引用
焦磊,阮浩,苏瑞意,葛志福,李玫,张程煜..2.5D编织石英/酚醛复合材料高温拉伸性能与损伤演化[J].复合材料科学与工程,2025,(8):54-65,12.基金项目
陕西省创新能力支撑计划项目(2024CX-GXPT 28) （2024CX-GXPT 28）
