AE2302 Aircraft Structures B.E Question Bank : mamse.co.in

Name of the College : MAM School of Engineering
University : Anna University Chennai
Subject Code/Name : AE2302-AIRCRAFT STRUCTURES-II
Dept : AERONAUTICAL ENGINEERING
Degree : B.E
Year/Sem: II/IV
Website : mamse.co.in
Document Type : Question Bank

Download Model Question Paper : https://www.pdfquestion.in/uploads/mamse.co.in/3200-AE2302.pdf

Aircraft Structures Question Paper

UNIT – I

PART-A :
1. In unsymmetrical bending, the neutral axis passes through the centriod of the cross-section. (True/False).
2. A rectangular cross-section is subjected to a skew load. Mark the neutral axis and sketch the bending stress distribution.

Related : MAM School AE2202 Aero Engineering Thermodynamics B.E Question Bank : www.pdfquestion.in/3196.html

3. When does unsymmetrical bending takes place.
4. A beam bends about its neutral axis for both symmetrical and unsymmetrical bending. (True/False).
5. Explain unsymmetrical bending with examples.
6. Define neutral axis and give expression to determine it.
7. Define principle axis of a section and give an expression to determine it.

8. Draw bending stress variation across the depth for (a) Rectangular section (b) I-section.
9. Distinguish between symmetric and unsymmetric bending.
10. What do you understand by unsymmetrical bending? Explain a method to find the stress in an unsymmetrical bending
11. Explain the Euler-Bernoulli hypothesis in bending of beams.
12. Bending of a symmetric section subjected to a skew load will be (symmetric/Unsymmetric).Explain.

PART-B :
1. Determine the normal stress at location A and G(refer fig.1)for the following cases of loading:
(i) Vx=1.2 kN acting through shear center.
(ii) Vy=1.2 kN acting through shear center.
Vx and Vy are applied0.8 m away from the indicated cross-section.
2. (i)Derive and obtain an expression for the bending stress in an unsymmetrical section subjected to bending, using the generalized ‘k’ method (10)
(ii) Explain the neutral axis method of bending stress determination mhen an arbitrary section is subjected to bending moments Mx and My. (6)
3. The section shown in fig.2 is subjected to bending moment Mx=30kNm.determine the bending stress at the corner points A, B, C and D.
4. A Z- section with 12 cm x 3 cm flanges and 20 cm x 3 cm web is subjected to Mx=10 kN-m and My=10 kN-m . Determine the maximum bending stress.
5. A box beam with 50 cm length is subjected to loads Px=8kN and Py=25kN as shown in fig.3. The stringer area is 3 cm2 each. Find the maximum bending stress.
6. obtain the bending stress values at the points A,B,C and D for the section shown in fig.4.Compute the stresses using moment values with respect to x and y axis and the principle axis.
7. Compute the load on the lumped flanges due to bending of the section shown in fig.5.Assume the web do not take part in bending. Compute the loads using moment values with respect to x and y axis and principle axis.
8. A beam section shown in fig.6.has four stringers. Area of the stringers A, B, C and D are 6.25, 3.125, 4.5 and 6sq.cm respectively. Find the stresses in all the four stringers of the section due to Mx=50kNm and My=-20kNm where x and y are the centriodal axes. Assume that webs and walls are ineffective in bending.
9. Refer fig.7.The section is subjected to an 8 kNm bending moment in the x-z plane and a 10 kNm bending in the y-z plane. Determine the bending stresses in all the corner points, indicating whether they are tensile or compressive.
10. Determine the bending stresses in the stringer of the section shown in fig.8 .E1= 70GPa , E2=210GPa and E3=100GPa.stringer areas are 2 cm2
11. A C-section beam of length 50 cm is subjected to loads Px=100N .the C-section dimensions are (i) Flanges- 25 cm x3 cm (ii)web 30cm x 3cm.

UNIT-II

PART-A
1. Shear flow can be defined for both thin and thick walled section (true/false)
2. Sketch the shear flow distribution when a thin walled L-section is subjected to a vertical load.
3. Define shear center and elastic axis.
4. Define shear flow .How the shear stress is obtained from the shear flow?
5. Indicate the shear center for channel section and angle section.
6. Draw shear flow diagram for I section and Channel section.

PART-B
1. Derive and obtain an expression for shear flow due to bending in the case of an arbitrary thin walled open section subjected to bending. How to modify the results you obtained for the case of closed section.
2. Plot the shear flow and locate the shear center for the section shown in fig.9.
3. Plot the shear flow and locate the shear center for the section shown in fig.10.
4. Find the shear flow for the section shown in fig.11.The Area of the each stringer =6 cm2.the loads are Sx=10kN and Sy=50kN through the shear center .Also find the Shear center
5. Find the shear center of the section shown in fig.12.Area a=b=4 cm2 and c=d=2 cm2