A particle method development for analysing the post-buckling behaviour of composite plate with cut-out
نویسندگان
1 Aerospace Research Institute, Ministry of Science, Research and Technology, Tehran, Iran
2 Aerospace Research Institute, Ministry of Science, Research and Technology, Tehran, Iran
3 Department of Mechanical Engineering, Tarbiat Modares University, Tehran, P.O. Box 14665-834, Iran
doi
10.24200/sci.2021.55993.4506چکیده
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
