PTU B.Tech Aero Engineering? 6th Semester May 2019 72457 AEROSPACE STRUCTURES II Question Papers

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Total No. of Pages : 03

Total No. of Questions : 09

B.Tech.(Aerospace Engg.) (2012 Batch) (Sem.-6)

AEROSPACE STRUCTURES-II

Subject Code : ASPE-312

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M.Code: 72457

Time: 3 Hrs.

Max. Marks : 60

INSTRUCTION TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.

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2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

SECTION-A

1. Write briefly :
   1. Define margin of safety and factor of safety
   2. What is inter-rivet buckling and sheet buckling?

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   3. What do you mean by effective width of a sheet?
   4. What is two bay crack criteria?
   5. Explain fatigue.
   6. What is difference between structural design of a launch vehicle and an aircraft?
   7. What is fitting factor and bearing factor?

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   8. What type of stresses are developed when a structure is subjected to torsion loads?
   9. What is Bredt- Batho formula and write its expression.
   10. What are characteristics of Wagner's beam?

SECTON-B

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2. Draw V-n diagram of a typical airplane and explain all its salient features.
3. A beam is subjected to a pure bending moment M. Prove that direct stress due to M at any point 'y' in the beam is given by s_x = My/I, where I is second moment of area of the cross section.
4. Calculate the position of the shear centre of the thin-walled channel section as shown in Fig 1. The thickness 't' of the walls is constant.
   
   

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