Bending and vibration studies of FG porous sandwich beam with viscoelastic boundary conditions: FE approach

Abstract

Bending and vibration characteristics of FG porous sandwich beam with viscoelastic boundary conditions are investigated. Complex shear modulus and associated loss factor are considered for the viscoelastic interlayer. The beam is constrained by viscoelastic supports (VES) at either end. Complex stiffness model is adopted for VES. The transverse deflection, natural frequency, loss factors, and mode shapes are obtained by varying VES stiffness. Furthermore, the study is extended to sandwich beams with various (H, O, V, and X) porosity patterns. The results convey that VES contribution in vibration damping is more predominant when the supports are less stiff (more viscous).

Keywords:

• Functionally graded materials (FGMs)
• viscoelastic material
• viscoelastic support
• porosity
• power-law
• loss factor

Disclosure statement

The authors have no conflicts of interest to declare that are relevant to the content of this article.

Data availability

Data sharing not applicable to this article as all data generated or analyzed during the current study are included in the article.