Buckling analysis of axially compressed CFRR cylindrical shell with damaged porous microcapsule coating in hygrothermal environments

This paper shows an analytical approach to investigate buckling behavior of a carbon fiber reinforced resin (CFRR) cylindrical shell covered with a damaged porous microcapsule coating subjected to axial compressed loads under hygrothermal environment. The formulas are in view of the Donnell?s shell theory considering the von K?arm?an geometric nonlinearity. The material parameters of microcapsule coating are predicted with the selfconsistent model and Mori-Tanaka model. By utilizing Galerkin approach, the buckling behavior for simplesupport damaged double-layered cylindrical shell are determined. The influence of temperature and moisture, interface debonding damages, material properties, geometry parameters of microcapsules and porosity upon the buckling behavior of the double-layered cylindrical shell are investigated. Results show moisture and geometry size of microcapsules are propitious to the critical buckling and post-buckling compressive load. In addition, the micro-structure damage greatly affects temperature and moisture. The geometric parameters of microcapsules significantly affect the buckling and post-buckling behavior of double-layered cylindrical shell.

Automated summary

This paper presents an analytical approach to investigate the buckling behavior of a carbon fiber reinforced resin cylindrical shell covered with a damaged porous microcapsule coating under axial compressed loads in a hygrothermal environment. The study considers the effects of temperature, moisture, interface debonding damages, material properties, geometry parameters of microcapsules, and porosity on the buckling behavior. Results show that moisture and the geometry size of microcapsules play a significant role in the critical buckling and post-buckling compressive load, while micro-structure damage greatly affects temperature and moisture. Geometric parameters of microcapsules have a significant impact on the buckling and post-buckling behavior of the double-layered cylindrical shell.