Thermomechanical buckling response of precompressed sandwich plate with foam metal core and symmetric FGM face layers subjected to magnetic field and Pasternak foundation

Abstract

This study uses the new trigonometric higher-order shear deformation theory to describe and investigate the thermomechanical buckling response of sandwich plates with a foam core layer and two symmetric FGM surface layers. The sandwich plate, exposed to the external magnetic field, is supported by the Pasternak foundation, and three types of metal foam (Nickel foam) supported by Graphene are employed in the core layer, while metal (Nickel) and ceramic (Al₂O₃) are utilized as symmetric FGM in the surface layers. The equations incorporated axial compressive forces, as well as additional forces caused by thermal and magnetic fields, forces from the foundation, and Hamilton's principle was used to obtain the sandwich plate's motion equation. The thermal buckling behavior of the sandwich plate is affected by the properties of the foam structure in the core layer (foam void ratio and foam distribution form), the material mixture ratios of FGM surface plates, the effect of axial loads, the effect of temperature rise, the effect of the external magnetic field, and the effects of spring and shear foundation parameters. It has been observed that especially the applied external magnetic field can be used to improve the thermal buckling behavior of the sandwich plate. Moreover, the specific type of foam core significantly influences the thermal buckling behavior. While one type of foam core has superior performance up to a specific temperature, the other type demonstrates increased susceptibility to thermal buckling.