| 杨兴林1 ，张昇雨 1 ，陈波1 ，马炳杰 2 ，邢雪2.考虑编织角动态变化的3维编织碳/碳复合材料高温剩余刚度模型[J].航空发动机,2024,50(3):72-78 |
| 考虑编织角动态变化的3维编织碳/碳复合材料高温剩余刚度模型 |
| High Temperature Residual Stiffness Model of 3D Braided Carbon/Carbon Composites Considering Dynamic Braiding Angle Changes |
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| DOI： |
| 中文关键词: 3维编织 碳/碳复合材料 高温疲劳 剩余刚度 编织角 |
| 英文关键词:3D braiding C/C composites high temperature fatigue residual stiffness braiding angle |
| 基金项目:江苏科技大学科研启动资金（1142931905）资助 |
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| 中文摘要: |
| 为研究3维编织碳/碳复合材料在高温环境下的疲劳特性，建立了一种编织角与循环数相关的编织角动态变化模型，将
其引入考虑温度的单向复合材料剩余刚度模型中，根据应力、编织角的变化以及温度等因素的影响，建立了3维编织复合材料高
温疲劳剩余刚度模型。在700 ℃的大气环境下，对添加抗氧化涂层的3维编织碳/碳复合材料进行了拉-拉疲劳试验，获取了剩余
刚度、剩余强度以及试验段长度等参量。结果表明：在700 ℃下3维编织碳/碳复合材料在拉-拉疲劳加载初期的剩余刚度显著提
高，然后保持稳定，在接近疲劳寿命时突降；剩余强度经10 5 循环后比初始强度提高了19.75%；在疲劳过程中的迟滞回线面积随着
循环数的增加逐渐增大；高温剩余刚度模型对700 ℃下剩余刚度试验数据拟合度较高，且通过编织角动态变化模型求得的不同循
环数下编织角模拟值与试验值的误差小于5%。 |
| 英文摘要: |
| In order to study the fatigue characteristics of 3D braided C/C composites under elevated temperature， a model of dynamic
changes of braiding angle related to the number of cycles was established， which was introduced into the residual stiffness model of
unidirectional composites considering temperature， and then the high-temperature fatigue residual stiffness model of 3D braided
composites was established considering factors such as stress changes， braiding angle changes， and temperature. Tensile-tensile fatigue
tests were conducted at an atmospheric environment of 700 ℃ to obtain the residual stiffness， residual strength， and length change of
specimen section on 3D braided C/C composites with anti-oxidation coating. The results show that at 700 ℃， the residual stiffness of 3D
braided C/C composites with anti-oxidation coating in the tensile-tensile fatigue increases significantly in the initial loading period， then
remains stable， and experiences a sudden decrease when approaching fatigue life. After 105 cycles， the residual strength of 3D braided C/
C composites increases by 19.75% compared with its initial strength； The area of the hysteresis loop during the fatigue process gradually
increases with the increase of the number of cycles. The high-temperature residual stiffness model fits well to the residual stiffness test data
at 700 °C， The error between the simulated value of the braiding angle under different cycles by the model considering dynamic braiding
angle changes and the experimental value is less than 5%. |
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