Volume 18, Issue 4 (8-2018)                   Modares Mechanical Engineering 2018, 18(4): 135-143 | Back to browse issues page

XML Persian Abstract Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

shahgholian ghahfarokhi D, Rahimi G H. Prediction of the critical buckling load of stiffened composite cylindrical shells with lozenge grid based on the nonlinear vibration analysis. Modares Mechanical Engineering. 2018; 18 (4) :135-143
URL: http://mme.modares.ac.ir/article-15-20086-en.html
1- Tarbiat Modares University
2- Tarbiat Modarres Univ
Abstract:   (2063 Views)
Due to unique properties, grid stiffened composite cylinder shells 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 cylinder shells without breakdown or failure. Vibration Correlation Technique (VCT) is one of the most important non-destructive methods that based on nonlinear vibration analysis. The aim of this research is the prediction of the critical buckling load of stiffened composite cylinder shells with lozenge grid by using VCT. For this purpose, linear and nonlinear vibration analysis of composite cylindrical shells were performed in different compressive loads by using finite element software ABAQUS, firstly. In the next step, linear buckling critical load was determined by using numerical methods. Then, non-linear critical buckling load of grid stiffened composite cylinder shells was predicted by using VCT. To validate the results of VCT, five composite cylindrical shells were fabricated by using filament winding method with same conditions and was placed under axial compression test. Finally, the critical buckling load was measured experimentally. The results show that the difference between the critical buckling load of VCT with experimental buckling load is less than 3%. This subject implies that VCT is suitable for prediction of critical buckling load of stiffened composite cylinder shells with lozenge grid with very high accuracy.
Full-Text [PDF 1344 kb]   (4038 Downloads)    
Article Type: Research Article | Subject: Aerospace Structures
Received: 2018/01/13 | Accepted: 2018/02/28 | Published: 2018/08/14

Add your comments about this article : Your username or Email:
CAPTCHA

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.