COMPOSITES SCIENCE AND ENGINEERING ›› 2023, Vol. 0 ›› Issue (5): 45-52.DOI: 10.19936/j.cnki.2096-8000.20230528.007

• BASIC STUDY • Previous Articles     Next Articles

Study on axial compression failure characteristics of composite
longitudinal circular corrugated cylindrical shell

LIANG Zeqian, WEI Gang*, LI Xiang   

  1. College of Aeronautical Engineering, Civil Aviation University of China, Tianjin 300300, China
  • Received:2022-04-08 Online:2023-05-28 Published:2023-08-22

Abstract: Lightweight structure and high-efficiency materials are the pursuit of aerospace and other industrial fields, such as automobiles, buildings, infrastructure, etc. The use of fiber-reinforced composites can effectively reduce the weight of the structure and improve the load-bearing capacity. The longitudinal circular corrugated structure of composite materials can greatly improve the load/mass efficiency of structural axial compression, thereby meeting the strength requirements of new composite materials and structures in the aerospace field. Based on the self-designed mould, the composite circular corrugated cylindrical shell was fabricated by vacuum bag hot-pressing method. On this basis, the axial compression performance of the structure is studied. The results show that compared with ordinary cylindrical shells with equal thickness and cross-sectional area, the ability of longitudinal circular corrugated cylindrical shells to bear axial load is significantly enhanced. For longitudinal circular corrugated cylindrical shells with the same structure and different thickness, the failure mode changes from overall buckling deformation to local crushing failure of the end face due to the increase of thickness. The numerical model was established and verified, and the influence of typical design parameters on axial compression performance of longitudinal circular corrugated cylindrical shell was simulated. The results show that when the preparation conditions are allowed, decreasing the size of single cell is beneficial to improving the axial compression resistance of longitudinal circular corrugated cylindrical shell, while decreasing the height has no obvious effect. The research results can provide reference for the application of longitudinal corrugated cylindrical shells in energy absorption of structures.

Key words: composite materials, longitudinal circular corrugated cylindrical shell, axial compression, failure characteristics

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