Efficient higher-order shell theory for laminated composites

Boundary-layer hygrothermal stresses in laminated, composite, circular, cylindrical shell panels

“…Next, superimposing a globally cubic varying displacement field on a zig-zag linearly varying one, an EHOST was obtained in [22] for cylindrical bending of symmetric, laminated composite shells. Hossain [23] used an improved finite element model for the linear analysis of laminated, doubly curved, moderately thick composite shells and shell panels.…”

Calculation of interlaminar shear stresses in laminated shallow shell panel using refined higher order shear deformation theory

“…However, these theories [19,26] demand the C 1 continuity of transverse displacements during their finite element implementations. Cho et al [27] also proposed an efficient higher order shell theory for symmetric laminated composites. In this theory, the in-plane displacement fields are obtained by superposing a global cubically varying displacement field on a zig-zag varying displacement field.…”

“…Further improvement in the modeling of the transverse shear deformation across the thickness, higher order shear deformation theories (HSDT) are proposed by many researchers [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. Ambartsumyan [12] was the first who proposed a shear deformation theory which ensures the transverse shear stress continuity conditions across the laminate interfaces and accounts for the parabolic distribution of the transverse shear stresses across the thickness of the composite laminate.…”

Indentation of sandwiches using a plate model with variable kinematics and fixed degrees of freedom

“…Since in many problems of practical interest the transverse normal stress has a significant bearing for keeping equilibrium, later full 3D ZZ were developed. Usually, ZZ require integration of local differential equilibrium equations to provide accurate stress predictions, but, since cases exist for which the predictions still remain inaccurate, as shown by Cho et al [24], researchers developed ZZ that can be accurate from constitutive equations.…”