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A novel layerwise theory along with higher-order shear deformation theory is studied to determine the stress distribution in a three-layer simply supported sector of cylindrical sandwich shell with piezoelectric face sheets and functionally graded carbon nanotube (FG-CNT) core. The out-of-shell displacement of the sandwich shell at each layer is assumed to be a quadratic polynomial function of the radial component in addition to a function of the coordinate components within the shell. The sandwich shell is subjected to the internal blast pressure so that the positive and negative phases of the pressure are considered. The 19 equations of motion have been derived by Hamilton’s principle and Maxwell’s static equations. The results indicate that the thickness, length and opening angle of the cylindrical shell have more effect on the stress distribution. In addition, the type of FG-CNT core has an effect on stress components in terms of time.

Stress distribution of a sector of cylindrical sandwich shell with FG-CNT core and piezoelectric face sheets subjected to blast pressure