金属内胆纤维环向缠绕储氢气瓶临界疲劳循环次数影响因素探究  

Research of Influencing Factors to Critical Fatigue Cycle Number for Hydrogen Storage Cylinder Made of Metal and Wound with Fiber

作　　者：陈泽鸿 黄淞 惠虎[1] Chen Zehong;Huang Song;Hui Hu(School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学机械与动力工程学院,上海200237

出　　处：《化工设备与管道》2022年第4期1-7,共7页Process Equipment & Piping

摘　　要：目前对于采用金属内胆纤维环向缠绕的气瓶疲劳寿命影响因素研究多集中于气瓶的结构参数和工艺参数,对初始存在裂纹的探究较少。对某工作压力30 MPa的金属内胆碳纤维环向缠绕储氢气瓶进行研究,采用基于断裂力学的疲劳裂纹扩展法,结合有限元分析,对其临界疲劳循环次数进行计算,探究不同自紧压力,以及相同自紧压力下不同初始裂纹深度对金属内胆纤维环向缠绕储氢气瓶临界疲劳循环次数的影响。结果表明:(1)气瓶的临界疲劳循环次数随自紧压力的增大而增大;(2)随初始裂纹深度的减小而增加,且深度越小,临界疲劳循环次数增量越大。Currently the research on the factors affecting the fatigue life of hydrogen storage cylinders made of inner metal shell and hoop wound fiber outside mostly focuses on the structural and process parameters of the cylinders,but less attentions on the initial cracks.In this paper,the research on a hydrogen storage cylinder made of inner metal shell and hoop wound fiber outside and with a working pressure of 30MPa was carried out.The critical fatigue cycle number of the cylinder was calculated by using the fatigue crack growth method based on fracture mechanics and finite element analysis so as to study the effects of different autofrettage pressures and different initial crack depths with the same autofrettage pressure on the critical fatigue cycle number of the cylinder.It was shown from the results that the critical fatigue cycle number of the cylinder will increase with the increase of autofrettage pressure,but decrease with the increase of initial crack depth.

关 键 词：环向缠绕储氢气瓶 疲劳裂纹扩展法 临界疲劳循环次数 自紧压力 初始裂纹深度 

分 类 号：TQ050.2[化学工程] TH49[机械工程—机械制造及自动化]