%0 Journal Article %T A particle method development for analysing the post-buckling behaviour of composite plate with cut-out %J Scientia Iranica %I Sharif University of Technology %Z 1026-3098 %A Dehghani, M. %D 2021 %\ 08/01/2021 %V 28 %N 4 %P 2176-2186 %! A particle method development for analysing the post-buckling behaviour of composite plate with cut-out %K perforated composite plates %K Post-buckling %K particle semi energy (PSE), elliptical and circular ‎cut-outs %R 10.24200/sci.2021.55993.4506 %X In this research, nonlinear buckling and post-buckling behaviours of composite plates with the ‎circular/elliptical cut-out are investigated using particle semi-energy (PSE) method. The semi-‎energy is based on the solution of compatibility equation via an Airy force and out-of-plane ‎displacement functions. The‏ ‏unknown parameters of these functions are determined by ‎minimizing the potential energy. The integrals of potential energy are replaced with ‎summations at perforated plate particle (node). The cut-out is modelled easily using these ‎nodes. The advantages of this method are modelling cut-out by nodes easily and proposing ‎just one of the displacement fields (i.e. out-of-plane). Based on the results, there is a good ‎agreement (1.25%) between the post-buckling loads derived from PSE of this paper and ‎experimental test of other literature. The accuracy of the finite element method (FEM) is 7.5% ‎with respect to experimental test. The influences of rotating elliptical cut-out and replacing it ‎with two circular cut-outs via same areas on post-buckling load are investigated‎ %U https://scientiairanica.sharif.edu/article_22293_d08c0eeb05d63bd8f76955abed2dbcf8.pdf