Amirkabir University of Technology Amirkabir Journal of Mechanical Engineering 2008-6032 52 1 2020 03 20 Prediction of the Critical Buckling Load of Grid-Stiffened Composite Plates Using Vibration Correlation Technique Prediction of the Critical Buckling Load of Grid-Stiffened Composite Plates Using Vibration Correlation Technique 221 232 3132 10.22060/mej.2018.14754.5931 FA Davoud Shahgholian-Ghahfarokhi PhD candidtae Milad Aghaei-Ruzbahani Student Gholam Hosein Rahimi Journal Article 2018 07 26 Due to unique properties, grid-stiffened composite plates are used extensively in aviation, marine and automotive industry. In recent decades, several studies are done to predict the critical buckling load of grid-stiffened composite plates without breakdown or failure. One of the most important nondestructive methods, is vibration correlation technique. The aim of this research is the prediction of the critical buckling load of grid-stiffened composite plates using vibration correlation technique. For this purpose, nonlinear vibration analysis of grid-stiffened composite plates is firstly performed in different compressive loads using finite element software ABAQUS. In the next step, critical buckling load of grid stiffened composite cylinder shells is predicted using vibration correlation technique. To validate the results of vibration correlation technique, three grid-stiffened composite plates are fabricated using filament winding and hand lay-up method with same conditions and was placed under axial compression test. Finally, the critical buckling load is measured experimentally. The results show that the difference between the critical buckling load of vibration correlation technique with experimental buckling load is less than 5%. This subject implies that vibration correlation technique is suitable for prediction of critical buckling load of grid-stiffened composite plates with very high accuracy. Due to unique properties, grid-stiffened composite plates are used extensively in aviation, marine and automotive industry. In recent decades, several studies are done to predict the critical buckling load of grid-stiffened composite plates without breakdown or failure. One of the most important nondestructive methods, is vibration correlation technique. The aim of this research is the prediction of the critical buckling load of grid-stiffened composite plates using vibration correlation technique. For this purpose, nonlinear vibration analysis of grid-stiffened composite plates is firstly performed in different compressive loads using finite element software ABAQUS. In the next step, critical buckling load of grid stiffened composite cylinder shells is predicted using vibration correlation technique. To validate the results of vibration correlation technique, three grid-stiffened composite plates are fabricated using filament winding and hand lay-up method with same conditions and was placed under axial compression test. Finally, the critical buckling load is measured experimentally. The results show that the difference between the critical buckling load of vibration correlation technique with experimental buckling load is less than 5%. This subject implies that vibration correlation technique is suitable for prediction of critical buckling load of grid-stiffened composite plates with very high accuracy. https://mej.aut.ac.ir/article_3132_6f54a15d8c60e7cc9f5001730e67dcb8.pdf