The present article deals with the vibration and damping characteristics of functionally graded carbon nanotubes reinforced hybrid composite skewed shell structure in different hygrothermal conditions. Carbon nanotube reinforced polymer as a matrix phase and carbon fibre as a reinforcing phase are used, and carbon fibre is graded with uniform distribution along the thickness direction for the shell panel according to the power law distribution. The Mori–Tanaka scheme and strength of materials are used to determine the mechanical properties of such functionally graded carbon nanotubes reinforced hybrid composite materials. Finite element modelling has been done by considering an eight-noded shell element with the transverse shear effect according to Mindlin’s hypothesis, and an oblique coordinate system is used for the functionally graded carbon nanotubes reinforced hybrid composite skewed shell structures. Damping is incorporated into such carbon nanotube–based hybrid skewed shell structure based on the Rayleigh damping model. A MATLAB-based in-house computer code has been developed for the proposed formulation and verified with published research work before using for the present dynamic analysis of functionally graded carbon nanotubes reinforced hybrid composite skewed shell structure under hygrothermal conditions. The effect of the carbon nanotube, carbon fibre, material distribution as per power law index and hygrothermal conditions on the damping behaviour of such functionally graded carbon nanotubes reinforced hybrid composite skewed shell structures have been studied. Furthermore, parametric studies are carried out for the first resonant frequency, absolute amplitude, settling time and carbon nanotube impact on the vibrational behaviour of different functionally graded carbon nanotubes reinforced hybrid composite skewed shell structures under different hygrothermal conditions.

本文探讨了功能梯度碳纳米管增强混杂复合材料斜壳结构在不同湿热条件下的振动和阻尼特性。使用碳纳米管增强的聚合物作为基质相并且碳纤维作为增强相，并且根据功率定律分布，沿着壳板沿着厚度方向对碳纤维进行分级，使其具有均匀的分布。Mori–Tanaka方案和材料的强度用于确定这种功能梯度的碳纳米管增强的杂化复合材料的机械性能。根据Mindlin的假设，通过考虑具有横向剪切效应的八节点壳单元来进行有限元建模，功能梯度碳纳米管增强杂化复合材料斜壳结构采用斜坐标系。在瑞利阻尼模型的基础上，阻尼被并入了这种基于碳纳米管的混合斜壳结构。已经开发了基于MATLAB的内部计算机代码，用于拟议的配方，并在用于湿热条件下功能梯度碳纳米管增强的混杂复合材料斜壳结构的当前动态分析之前，已通过已发表的研究工作进行了验证。研究了碳纳米管，碳纤维，按照幂律指数分布的材料以及湿热条件对这种功能梯度碳纳米管增强的混杂复合斜壳结构阻尼行为的影响。此外，