Free vibrations of orthotropic sandwich conical shells with various boundary conditions

Free Vibration Characteristics of Laminated Composite Joined Conical-Cylindrical Shells

“…Based on progressive mesh re"nement, a 40-element idealization for two-section shell geometry, and a 60-element idealization for a three-section case are found to be well adequate to model the full shell for the present analysis. Firstly, the formulation developed herein is validated considering free vibration analysis of isotropic joined conical}cylindrical shell [4] and laminated circular sandwich conical [10,14] and the results are compared in Tables 1 and 2 along with the available solutions. It is observed from these tables that the present results are in fairly good agreement with those of the existing results.…”

“…It is observed from these tables that the present results are in fairly good agreement with those of the existing results. The small discrepancies in the results may be attributed to the di!erent theories and solution approaches used in the literature [4,10,14]. The material properties of CFRP, unless speci"ed otherwise, used in the present analysis are…”

A generalized layerwise finite element for multi-layer damping treatments

“…Problem 7 -Simply supported conical sandwich shell In this example it is considered a conical sandwich shell with a soft core made of a low modulus orthotropic material [44,45]. The geometry of the conical shell is characterized by its mid-surface radius at the small end of the cone (R), the meridional length (L) and the semivertex angle (a) measured between one of the meridians and the cone axis.…”

A Semi-Analytical Coupled Finite Element Formulation for Composite Shells Conveying Fluids

“…Ramasamy and Ganesan [1] developed a general shell finite element for viscoelastic shells, based on the displacement field proposed by Wilkins et al [3]. Figure 1 shows the schematic of the viscoelastic shell structure, consisting of a core viscoelastic layer sandwiched between two layers.…”

“…This review paper focuses more on the physical aspects of the problem than on mathematical formulations. Ramasamy and Ganesan [2] studied the vibration characteristics of fluid-filled shells with a constrained viscoelastic layer based on the Wilkins theory [3]. However, they did not consider fluid flow.…”