玄武岩纤维增强复合材料气瓶结构强度分析

Structural strength of basalt fiber-reinforced composite cylinder

氢能是来源广、能储存、使用性能稳定的清洁能源,其制备、储存和运输是人们关注的重心,其中氢能高效可靠的储运技术是推广应用的关键。为此,研究了利用玄武岩纤维缠绕工作压力为35 MPa的储氢复合材料气瓶的可靠性,运用网格理论计算出纤维缠绕层结构参数,基于Abaqus有限元分析软件,建立玄武岩纤维增强储氢复合材料气瓶有限元模型,对储氢气瓶进行结构强度分析,计算气瓶在不同压力下的结构强度并对气瓶进行水压爆破试验验证仿真分析的可靠性。研究结果表明:①纤维应力比为2.34,爆破比为3.17,满足GB/T 35544—2017《车用压缩氢气铝内胆碳纤维全缠绕气瓶》标准对承压和安全的要求;②通过水压爆破试验得到气瓶的实际爆破压力为112 MPa,与有限元分析结果偏差0.67%,说明所建立的有限元模型和使用的方法具有较高的准确性。

For hydrogen,a clean energy with massive source,big store charge,and stable performance,the preparation,storage,and transportation attract more attention.Furthermore,it’s very critical for this energy to apply efficient and reli⁃able storage and transportation technologies.So,the reliability of hydrogen-storage composite cylinder wound with basalt fi⁃ber under operation pressure of 35 MPa was studied,some structural parameters of fiber winding layer were calculated ac⁃cording to grid theory.Then based on Abaqus finite element analysis software,the finite element model of basalt fiber-rein⁃forced hydrogen-storage composite cylinder was established to analyze the structural strength of hydrogen-storage cylinder and calculate this strength under different pressure.Finally,simulation reliability was verified by some hydrostatic burst test on the cylinder.Results show that(1)for the fiber,both stress and burst ratios are 2.34 and 3.17,respectively,which may satisfy pressure bearing and safety requirements stipulated in the standard of“Carbon Fiber Full-Wrapped Com⁃pressed Hydrogen Cylinder with Aluminum Liner for Vehicles”(GB/T35544-2017);and(2)the actual bursting pressure of cylinder determined in the test is 112 MPa,which is 0.67%deviated from that of finite element analysis.It is indicat⁃ed that the finite element model established and the method adopted are of higher accuracy.