Mass analysis of turbofan engine casing dimensioned with buckling condition
Abstract
The object of analysis is the casing of F124 turbofan engine. Analysis of load conditions indicates that a dimensioning load case is crash landing, while an axial component of inertial load is about 30g. The casing is a thin-walled ribbed shell made of titanium alloy. The aim of the paper is mass analysis of the casing subjected to axial compression. Comparative analysis of selected materials, i.a., a sandwich structure (metal-fibre laminate) made of titanium alloy faces and flax fibre core, is performed using a finite element method. In the case of a sandwich structure, a shift of titanium layers from a neutral surface of the shell is significant since it causes a decrease in titanium overall thickness compared to a reference plain model (without decreasing bending stiffness). The best material mass efficiency were obtained for a sandwich structure and it is over 40% higher compared to a plain isotropic structure, whereas, in the case of the original ribbed structure the efficiency is about 26% higher.
- Publication:
-
Proceedings of the 15th Stability of Structures Symposium
- Pub Date:
- February 2019
- DOI:
- 10.1063/1.5086144
- Bibcode:
- 2019AIPC.2060b0013S