复合材料科学与工程 ›› 2020, Vol. 0 ›› Issue (6): 57-61.

• 应用研究 • 上一篇    下一篇

自紧压力对全缠绕复合气瓶疲劳性能的影响

秦小强1,2, 邓贵德2*, 梁海峰1   

  1. 1.太原理工大学化学化工学院,太原030024;
    2.中国特种设备检测研究院,北京100029
  • 收稿日期:2019-10-08 出版日期:2020-06-28 发布日期:2020-06-28
  • 通讯作者: 邓贵德(1982-),男,博士,高级工程师,主要从事特种设备安全方面的研究,dengguide@163.com。
  • 作者简介:秦小强(1994-),男,硕士研究生,主要从事复合材料气瓶方面的研究。
  • 基金资助:
    国家重点研发计划项目课题(2018YFF0215103)

EFFECT OF AUTO-FRETTAGE PRESSURE ON FATIGUE PERFORMANCE OF FULLY-WRAPPED COMPOSITE CYLINDER

QIN Xiao-qiang1,2, DENG Gui-de2*, LIANG Hai-feng1   

  1. 1. School of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
    2. China Special Equipment Inspection and Research Institute, Beijing 100029, China
  • Received:2019-10-08 Online:2020-06-28 Published:2020-06-28

摘要: 为了提高天然气汽车的续航里程,设计了30 MPa车用全缠绕压缩天然气气瓶。本文基于有限元软件平台下的复合材料分析模块,研究了不同的自紧压力对采用小角度螺旋缠绕、大角度螺旋缠绕加环向缠绕三种混合缠绕的全缠绕复合气瓶疲劳性能的影响,分析时采用SWT平均应力修正方程对交变应力幅进行了修正。结果表明:对气瓶进行自紧处理,基本不会改变内胆的交变应力幅,但是却可以降低其平均应力;在满足纤维应力比的前提下得出其最佳自紧压力为52 MPa,此时其疲劳循环次数约为15000次。

关键词: 复合材料气瓶, 纤维缠绕方式, 自紧压力, 疲劳分析, 纤维应力比

Abstract: As key components of natural gas vehicles, high-pressure gas cylinders are widely used. In order to improve the mileage of the natural gas vehicles, the storage pressure of natural gas should be increased to improve the energy density. Therefore, a 30 MPa fully-wrapped compressed natural gas cylinder for vehicles has been designed and developed to improve the market competitiveness of the natural gas vehicles. The fully-wrapped composite cylinder adopts mixed fiber winding mode: low-angle helical winding, high-angle helical winding and hoop winding. Effects of different auto-frettage pressures on the fatigue properties of the fully-wrapped cylinders were investigated based on the ANSYS composite PrepPost component under ANSYS Workbench platform. The alternating stress amplitude was modified using the SWT mean stress equation. The results show that the auto-frettage treatment of the cylinder does not change the alternating stress amplitude of the liner, but it can reduce the mean stress, and the optimum auto-frettage pressure of the cylinder is 52 MPa under the premise of satisfying the fiber stress ratio, and the number of fatigue cycles is about 15000 times.

Key words: composite gas cylinders, fiber winding methods, auto-frettage pressure, fatigue analysis, fiber stress ratio

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