Bending analysis of a sandwich beam
with softcore and carbon nanotube reinforced composite face sheets in the literature is carried out by Jedari Salami  based on extended high-order sandwich panel theory.
obtained the fractional derivative model to describe the viscoelasticity of the system based on the Timoshenko theory and Euler-Bernoulli hypothesis and proposed a finite element formula for analyzing the sandwich beam
of viscoelastic material with fractional derivative and the results were verified numerically .
Bhangale and Ganesan  employed the finite element method to examine the influence of temperature on natural frequencies and loss factors of a functionally graded sandwich beam
with con strained viscoelastic core.
Yalcintas and Dai [14, 15] investigated dynamic responses of MR fluid adaptive sandwich beam
using the energy approach and compared the responses with the structure employing ER fluid.
For validation tests, the natural frequencies calculated by analytical and numerical method for simply supported sandwich beam
. The natural frequencies of the simply supported of a sandwich beam
are expressed analytically by [8, 11]:
Based on previous considerations, in this paper we determined a designed map for sandwich beam
with aluminium faces and cork core loaded in three-point bending such in figure 3.
Thereafter numerous theoretical analyses of simple sandwich beam
and plate structure were published based on the laminate theories by Ross et al.
 used the finite element and harmonic balance methods to calculate the instability regions of the sandwich beam
with an electrorheological fluid core subjected to an axial dynamic force.
The flexural rigidity of an open sandwich beam
assumed to have thin skins of equal thickness represents the sum between the flexural rigidities of the skins and core determined about the centroidal axis of the whole cross section (Zenkert, 1997):
Then a sandwich beam
is modeled and FEA (3PBT and 4PBT) is performed using the determined equivalent properties.
Njuguna, "Free vibration of a three-layered sandwich beam
using the dynamic stiffness method and experiment," International Journal of Solids and Structures, vol.
studied nonlinear dynamic response and vibration control capabilities of Electrorheological materials based adaptive sandwich beam