This chapter uses the finite element platform to investigate the nonlinear bending behaviour of porous sandwich plates in the finite element (FE) framework. The effects of various loading conditions, lengths, load intensities, and porous sizes on nonlinear bending behaviour are examined. Porous sandwich plates comprise a lightweight core material sandwiched between two rigid face sheets and are recognised for their exceptional strength-to-weight ratio and energy absorption properties. The chapter incorporates the porosity of the core material and applies boundary conditions such as clamped, to assess their influence on the mechanical performance of the plates. Thin shell elements are utilised to model the plates, capturing the bending and stretching behaviours crucial to understanding their response to external forces. The simulations include linear static and nonlinear analyses, emphasising how different conditions alter the load-carrying capacity, deformation characteristics, and stress distributions within the porous sandwich plates. These findings provide valuable insights into the practical application of sandwich plates in designing advanced engineering materials facilitated by the detailed simulations conducted in FE software.