| Autor: |
N. C. Mahendra Babu, A. R. Aditya |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings. |
| ISSN: |
0094-243X |
| DOI: |
10.1063/1.5141564 |
| Popis: |
Curved stiffeners offer certain advantages over conventional isogrid stiffeners in GSS. Recent developments in composite materials manufacturing process like Automatic fiber placement technique have made fabrication of curved GSS easier. The present work is aimed at designing curved stiffeners to replace conventional isogrid stiffeners for GSS employed in fuselage applications. A typical 30° curved panel with isogrid stiffeners is considered for the study. The stiffness of the selected panel is evaluated through finite element analysis and validated with test results. The panel considered has totally three stiffeners one in hoop direction and two in spiral direction, for replacing these stiffeners, stiffener in hoop direction is kept same and spiral direction stiffeners are changed from straight to curved with suitable designed angles. Finite element model of the GSS panel with designed curved stiffeners is developed and analyzed for stiffness. Employing the designed curved stiffeners in place of isogrid stiffeners for the selected GSS panel has resulted in 17% increase in stiffness with marginal (0.6%) increment in mass. Further, parametric study of stiffener cross section and geometry was carried out to arrive at optimum stiffener cross section and stiffener curvature. The same GSS panel with optimum cross section and stiffener curvature is analyzed and found to provide increased stiffness of up to 27% with considerable reduction in mass. The curved GSS panel with optimized cross section and curvature is employed for a selected fuselage section of an executive transport aircraft. The selected fuselage section is modeled, analyzed and found that an increase of 9.5% in stiffness of the fuselage is achievable incorporating optimized curved stiffeners. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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