Projects AE – Structural design

Final project – Structural design and test of wing Project mode: Group – 4 members Each group will design, build, and test a structural configuration for a wing construction. The goal is to design, analyze, build and test a wing structure that will carry the heaviest load, have the minimum weight possible while meeting given specifications and predicted behavior from analysis. All wing structures will be gradually loaded until they fail. Specifications:

1. Structure construction: Semi-monocoque3

2. Structural elements to be used: ribs, spars, stringers, and/or skin

3. Materials of construction: free4

4. Wing geometry: Airfoil: NACA 2424 MAC 0.16 m AR 5.0 Taper ratio 1.0 Twist angle 0 ° Dihedral angle 0 °

5. Flight level

h 0 m

3 Selected section can be single/multi cell 4 Materials and material properties related to the analysis must be used in the analysis and included in the final report

Projects AE – Structural design

6. Design speed

V ≈ 100 km/h

7. The construction must be accompanied by a documented report of design, analysis, and construction.

8. Supports and loading configuration are depicted in Fig. 15.

9. Grading will be based on the maximum loading to weight ratio (Lmax/W) (20%), accuracy of reported results (25%), project report (40%), and delivery (15%) as presented in table 1.1.

Table 1.1. Evaluation parameters

Grade 10 9 8 7 5

Parameter

max

max

max

W

LW

L

(20%)

1 0.9 to 0.99 0.8 to 0.89 0.7 to 0.79 0.1 to 0.69

Accuracy of analytical and experimental results

(25%) 95 to 100% 90 to 94.99% 85 to 89.99% 80 to 84.99% > 79.99%

Project report (40%) - Front page - Index - Introduction - Materials - Procedure - Results - Conclusions

Documentation is well written and the

project is well explained, it meets

all of the specifications

Documentation or project lacks of fair

in writing or explanation, it

meets most of the specifications

Documentation and project lacks of a fair explanation,

it meets most of the specifications

Documentation and project lacks of a fair explanation, it meets some of the specifications

Documentation poorly written and the project is not well explained

5 Loading will be done using an angle of attack = 0°

Projects AE – Structural design

- References

Report delivery (15%) Delivery was on

time Delivery was 0 - 6

hours overdue Delivery was 6 - 12

hours overdue Delivery was 12 - 18 hours overdue

Delivery was 18 -24 hours overdue6

Penalties: 1. Dimensions: Length/chord tolerance of +/- 4mm, and thickness tolerance of+/-2 mm are allowed; 0.5 points in final grade will

be deducted due to tolerance violations. 2. Loading to weight ratio: Values less than n = 4.4 will be automatically graded 0 (zero).

Figure 1: Wing loading schematic, Dimensions in mm

6 After the 24th h had passed, no more project deliveries will be graded

100

P

150 100 150

10