碳纤维缠绕增强复合材料气瓶及自紧工艺优化  

Optimization of carbon fiber wound reinforced cylinder composites and self-tightening process

作　　者：赵冠熹 李明 郭永智 何太碧[1] 韩锐 ZHAO Guanxi;LI Ming;GUO Yongzhi;HE Taibi;HAN Rui(Xihua University,Chengdu 610039,China;Sinoma Science&Technology(Chengdu)Co.,Ltd.,Chengdu 611435,China)

机构地区：[1]西华大学,成都610039 [2]中材科技(成都)有限公司,成都611435

出　　处：《复合材料科学与工程》2023年第8期57-65,共9页Composites Science and Engineering

基　　金：四川省科学技术厅项目(2020ZDZX0029);四川省科技创新(苗子工程)培育项目(2022052);成都市科技人才创新创业项目(2021-RC03-00024-CG)。

摘　　要：为提高碳纤维复合材料气瓶的承载能力和使用安全性,本文对其碳纤维/环氧树脂缠绕层材料进行力学性能研究。首先提出了两种不同树脂配方体系,并制备树脂浇注体。分析可知CYD-128树脂体系的断裂伸长率较高,但其模量比O-lin树脂低,强度相对较差。制备并对比不同树脂配方下碳纤维复合材料NOL环拉伸强度,选择O-lin树脂作为碳纤维复合材料基体。对国内三种不同厂商的T700-12K碳纤维进行复丝拉伸试验,对断裂面进行SEM测试,根据试验结果选择恒神碳纤维作为复合材料增强体。进一步通过有限元数值模拟分析自紧工艺对碳纤维缠绕气瓶应力水平和疲劳寿命的影响,根据DOTCFFC标准优化自紧工艺,在最佳自紧压力下,复合材料气瓶内衬的应力强度均有不同程度的降低。根据上述复合材料及自紧工艺制备碳纤维缠绕气瓶并进行水压爆破试验和常温压力循环试验,结果表明其爆破压力和疲劳寿命较相关标准均有提升,为优化压缩天然气和氢气储运装备的工业生产和安全使用提供参考。In order to improve the bearing capacity and safety of carbon fiber composite gas cylinders,the me⁃chanical properties of carbon fiber/epoxy resin wound layer materials were studied in this paper.Firstly,two differ⁃ent resin formulations were proposed and resin castings were prepared.The analysis showed that CYD-128 resin sys⁃tem had higher elongation at break,but lower modulus and poorer strength than O-lin resin.The tensile strength of NOL ring of carbon fiber composite was prepared and compared under different resin formulations,and O-lin resin was selected as the matrix of carbon fiber composite.T700-12K carbon fibers from three different manufacturers in China were subjected to multiwire tensile test and SEM test on fracture surface.According to the experimental re⁃sults,Hengshen carbon fibers were selected as composite reinforcement.Furthermore,the influence of the selftightening process on the stress level and fatigue life of the carbon fiber wound cylinder was analyzed by finite ele⁃ment numerical simulation.The self-tightening process was optimized according to the DOT-CFFC standard,and the stress intensity of the composite cylinder liner was reduced to different degrees under the best self-tightening pressure.According to the above composite materials and self-tightening process,the carbon fiber wound cylinder was prepared,and the hydraulic bursting test and normal temperature pressure cycle test were carried out.The re⁃sults show that the bursting pressure and fatigue life of the cylinder are improved compared with the relevant stand⁃ards,which provides a reference for optimizing the industrial production and safe use of compressed natural gas and hydrogen storage and transportation equipment.

关 键 词：复合材料气瓶 复丝拉伸 自紧压力 水压爆破试验 常温压力循环试验 

分 类 号：TB332[一般工业技术—材料科学与工程]