This paper investigates, for the first time, the thermo-elastic responses of a functionally graded (FG) graphene nanoplatelets (GPLs) reinforced composite (FG-GPLRC) closed cylindrical shell under a temperature field due to steady-state thermal conduction along thickness direction. A comprehensive thermo-elastic model covering various thermal boundary conditions (TBCs) is established. Analytical solutions for both radial stress and hoop stress of the shell are derived based on the plane hypothesis and displacement continuity conditions between the cylindrical shell and hemispherical ends. A parametric study is conducted to investigate the effects of GPL distribution pattern, weight fraction and geometry as well as TBCs on thermal stresses and deformation of the shell. It is found that GPL distributions V and O are preferred patterns for both FG-GPLRC cylindrical shell and hemispherical ends, respectively. The closed FG-X-GPLRC cylindrical shell with higher GPL concentration has higher thermal conductivity consequently higher thermal stresses. The research findings are of practical importance for the applications and design of closed FG-GPLRC shells in a variety of engineering sectors.

本文首次研究了功能梯度（FG）石墨烯纳米片（GPLs）增强复合材料（FG-GPLRC）封闭圆柱壳在温度场下沿厚度方向的稳态热传导引起的热弹性响应。建立了涵盖各种热边界条件（TBC）的综合热弹性模型。基于平面假设和圆柱壳与半球形端之间的位移连续性条件，得出了壳的径向应力和环向应力的解析解。进行了参数研究，以研究GPL分布模式，重量分数和几何形状以及TBC对壳的热应力和变形的影响。已经发现，对于FG-GPLRC圆柱壳和半球形端部，GPL分布V和O分别是优选的图案。GPL浓度较高的密闭FG-X-GPLRC圆柱壳具有较高的热导率，因此具有较高的热应力。研究结果对于封闭的FG-GPLRC壳体在各种工程领域的应用和设计具有现实意义。