Analytical prediction of axial compression buckling behavior of all-composite  corrugated sandwich cylindrical shell

doi:10.19936/j.cnki.2096-8000.20260428.014

Abstract

Abstract: For the axial linear buckling behavior of all-composite longitudinally continuous trapezoidal corrugated the cylindrical shell, an analytical prediction method convenient for engineering application was proposed. This method was highly efficient for calculation and analysis, and could distinguish four buckling instability modes: intracellular face buckling, corrugation buckling, sandwich panel buckling and cylindrical shell global buckling. The errors between the calculated critical buckling stress and the 3D finite element simulation results were within ±12%. Based on the validated analytical formulas, parameters analysis were conducted to collaboratively analyze the variations of buckling critical stress, instability modes of the composite corrugated sandwich cylindrical shell with structural and layup parameters, and failure mechanism diagrams were drawn. It is found that all-composite corrugated sandwich cylindrical shells are not prone to sandwich panel buckling; increasing the corrugation inclination angle or the thickness of the wall of the core can improve the buckling critical stress; with all geometric dimensions unchanged, buckling critical stress and instability modes also vary with the ply angles of the face and the core, and the critical stress of intracellular face buckling and of corrugation buckling reach their extreme values at 45°.

Key words: composite materials, corrugated sandwich cylindrical shell, critical buckling stress, buckling instability mode, instability mechanism

CLC Number:

TB332

ZHOU Wenting , WANG Cong , WANG Yanxia , MA Miaoli. Analytical prediction of axial compression buckling behavior of all-composite corrugated sandwich cylindrical shell[J]. COMPOSITES SCIENCE AND ENGINEERING, 2026, 0(4): 115-123.

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Analytical prediction of axial compression buckling behavior of all-composite corrugated sandwich cylindrical shell

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