ANSYS ]] Results for Semi-monocoque structure

����Preference: Structural

����Preprocessor:

� Element type: SHELL99

� Real Constants: Mat no. theta thk Set 1: 1.0000 0.0000 3.800 Set 2 : 1.0000 0.0000 40.000

���� Section type:

� Material Properties: Linear � Elastic � Isotropic Young’s modulus [E] = 70000 Poisson’s ratio [ν] = 0.33

� Modeling:

� Creating key points: Key point number = 1 X, Y, Z= 0.00000 0.00000 0.00000 Key point number = 2 X, Y, Z= 0.00000 1000.00 0.00000 Key point number = 3 X, Y, Z= 500.000 1000.00 0.00000 Key point number = 4 X, Y, Z= 500.000 0.00000 0.00000

���� Creating line: Line between key points 1 & 2

���� Extruding line: Extrude the line about key points 3 & 4

���� Extruded model:

���� Creating bulkheads by dividing by work plane:

���� Creating cutouts at the centre by dividing the area by cylindrical volume:

� With cutouts:

� Meshing: Creating T-section stiffeners

Stiffeners:

Mesh attribute for bulkheads:

� Bulkheads & Stiffeners

Meshed object:

� Loads: Static analysis Fixed at the bottom

Force Fy on selected nodes. Fy = -4629.60000

���� Static analysis:

� Solution(static) Solving the problem.

Eigen buckling:

� General Postprocessor: Plot Results � Deformed shape

Side view showing the cutouts deformation

� VonMises stress:

� Stress at the cutout showing the maximum value

� Buckling

Mode shape: 1

Mode shape: 2

Mode shape: 3