@article{MAKHILLRJAS202015410239, title = {Effects of Ply Orientation on Nonlinear Buckling of Aircraft Stiffened Composite Panel}, journal = {Research Journal of Applied Sciences}, volume = {15}, number = {4}, pages = {139-149}, year = {2020}, issn = {1815-932x}, doi = {rjasci.2020.139.149}, url = {https://makhillpublications.co/view-article.php?issn=1815-932x&doi=rjasci.2020.139.149}, author = {Ouadia,Abdellatif,Hasnae,Oumnia,Mohamed and}, keywords = {Stiffened composite panels,nonlinear buckling analysis,ply orientations,FEM,CFC,FEA}, abstract = {In this study, gradual demand for curved, stiffened panels composite emerged from Carbon Fiber Reinforced Plastics (CFRP) these are structures that are frequently used in aerospace engineering. Up to 50% of the primary structure of the Boeing 787 is made up of woven graphite-epoxy. This research emphasizes the buckling analysis of stiffened composite panels using the nonlinear, finite element modeling. The stiffened panel is assumed to be subjected to a uniform axial compression load of 10 kN. For the nonlinear buckling analysis, a stiffened composite panel is made of Carbon Fibre Composite (CFC) in epoxy, Kevlar in epoxy and E-Glass (EG) in epoxy. Due to the fact that there are numerous stiffened composite panels materials this study, therefore uses a numerical approach to present the study and results of the nonlinear static buckling analysis of i-stiffened on different composite panels. This research also presented the effect of the different ply orientations using Abaqus Finite Element Analysis (FEA).} }