03 / Stiffened Panel - Aerostructures
03 / Stiffened Panel - Aerostructures
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PROBLEM STATEMENT
PROBLEM STATEMENT
The scope of this project was to design, analyze, manufacture and test a stiffened panel. Stiffened panels are the basis of most commercial aerospace structures due to their high structural buckling stress while having less weight. The objective of this project was to design a stiffened panel with both skin and stringers made of aluminum 2024-T3 as shown in the diagram on the left. To achieve the design and manufacturing criteria, using excel, a Section Properties Calculator was created to explore multiple design iterations and make the most optimized selection in terms of design variables such as the flange lengths, rivet spacing, etc.
Phase A & B:
Phase A & B:
CONCEPT
CONCEPT
We developed a Section Properties Calculator in excel, with which we explored several design iterations, out of which two with the highest scores were chosen and developed in CAD as shown on the left.
CALCULATIONS
CALCULATIONS
Failure Analysis was carried out in the following aspects:
Column Buckling
Local buckling in the stringers
Crippling strength
Johnson-Euler failure
Inter-rivet buckling
For more details on the calculations and design details please refer to full report here:
Phase C:
Phase C:
FABRICATION & ASSEMBLY
FABRICATION & ASSEMBLY
In the Concordia manufacturing lab we assembled the designed panel as shown in photos. The lab technicians had prepared the sheet metal parts as flat CNC-ed sections with the rivet holes cut out in the panel.
The final assembly comprised of following steps -
measuring and marking the plate with height gauge and sharpie
measuring and marking the fold lines of the stiffneers using arking callipers
folding the flat stiffeners using manual sheet metal bending machine
creating rivet holes in the stiffeners with lab technicians help
finishing the rivet holes using manual deburring tool
riveting the stiffeners onto the metal panel
Phase D:
Phase D:
final video.mp4COMPRESSIVE STRENGTH TESTING RESULTS
COMPRESSIVE STRENGTH TESTING RESULTS
COMPRESSIVE STRENGTH TESTING RESULTS
(FEA) SIMULATION RESULTS
(FEA) SIMULATION RESULTS
FEA Results
LAB TESTING RESULTS
LAB TESTING RESULTS
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