Effects of shear stresses and rotary inertia on the stability and vibration of sandwich cylindrical shells with FGM core surrounded by elastic medium

ABSTRACT

The vibration and stability of axially loaded sandwich cylindrical shells with the functionally graded (FG) core with and without shear stresses and rotary inertia resting Pasternak foundation are investigated. The dynamic stability is derived based on the first order shear deformation theory (FSDT) including shear stresses. The axial load and dimensionless fundamental frequency for FG sandwich shell with shear stresses and rotary inertia and resting on the Pasternak foundation. Finally, the influences of variations of FG core, elastic foundations, shear stresses and rotary inertia on the fundamental frequencies and critical axial loads are investigated.

KEYWORDS:

• Dental implant
• elastic foundation
• functionally graded sandwich shells
• rotary inertia
• shear stresses
• stability
• vibration

Appendix A

and I_j (j = 1,2) are parameters and expressed as

(A1)

where the following definitions apply:

(A2)

Appendix B

u_i(i = 1,2,3) are the parameters and are expressed as

(B1)