Aerospace Vehicle Structures-I B.Tech Question Paper : vardhaman.org
College : Vardhaman College Of Engineering
Degree : B.Tech
Department : Aeronautical Engineering
Semester : IV
Subject :Aerospace Vehicle Structures-I
Document type : Question Paper
Website : vardhaman.org
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Aerospace Vehicle Structures-I Question Paper :
Four Year B. Tech IV Semester Regular/Supplementary Examinations May/June – 2014
(Regulations : VCE-R11)
(Aeronautical Engineering)
Date : 9 June, 2014
Time: 3 hours
Max Marks: 75
Answer ONE question from each Unit
All Questions Carry Equal Marks
All parts of the question must be answered in one place only
Related : Vardhaman College Of Engineering Production Technology B.Tech Question Paper : www.pdfquestion.in/6344.html
Unit – I :
1. a) Explain the statically determinate and indeterminate structure
b) A beam ABC of length 2L rests on three supports equally spaced w/unit length throughout the length of the beam as shown in Fig.1
2. For Fig.2, determine the unknown nodal displacements and forces in the
Unit – II
3. a) What are the assumptions made in Beams with elastic supports. 5M
b) Derive differential equation for a beam resting on elastic foundation. 10M
4. a) What are the assumptions of Euler’s theory. 5M
b) A hollow alloy tube of 6 m long with external diameter of 50mm of 30mm was found to be extend 2.98mm under a tensile load of 50KN . load for the tube, when used as strut with both ends pinned. Also, find the safe the tube taking a factor of safety 4.
Unit – III
5. a) Define i. Plane stress ii. Plane strain
b) A piece of material is subjected to tensile stresses of 70 N/mm2 and 30 N/mm2
6. Direct stresses of 160 N/mm2 (tension) and 120 N/mm2 (compression) particular point in an elastic material on two mutually perpendicular planes. stress in the material is limited to 200 N/mm2 (tension). Calculate stress at the point on the given planes. Determine also the value and the maximum value of shear stress at the point. Verify your answer using Mohr’s circle.
Unit – IV
7. Find the support reactions in the beam ABC shown in Fig.3 using the principl
8. A steel rod of uniform circular cross section is bent as shown in Fig.4,
horizontal and CD being vertical. The arms AB, BC, and CD are of equal length
encastré at A, and the other end D is free. A uniformly distributed load covers
Find the components of the displacement of the free end D in terms of EI and GJ.
Unit – V
9. a) Explain Bredt–Batho theory with neat sketch. 5M
b) The cold-formed section shown in Fig. 5 is subjected to a torque of 50 N m.
Calculate the maximum shear stress in the section and its rate of twist.
10. a) Briefly explain torsion of closed section with Bredt-Batho theory. 6M
b) Derive expression of shear of closed section beam. 9M
Four Year B. Tech IV Semester Supplementary Examinations December – 2013 :
Regulations: VCE-R11
Aerospace Vehicle Structures – I :
(Aeronautical Engineering)
Date : 24 December, 2013
Time : 3 Hours
Max. Marks : 75
Answer ONE question from each Unit
All Questions Carry Equal Marks
All parts of the question must be answered in one place only
Unit – I :
1. a) Explain statically indeterminate (redundant) structure with an example. 3M
b) Determine the redundant fixed end moments for the beam shown in figure below Fig.1 12M
2. The cantilever beam shown in figure below is singly redundant. Find the loadings in the members 15M
Unit – II :
3. Determine stresses of 160N/mm2 tension and 120N/mm2 compression, are applied at a particular point in an elastic material on two mutually perpendicular planes. The principle stress in the material is limited to 200N/mm2, tension. Calculate the allowable stresses at the point on the given planes. Determine also the value of the other principle stress and the maximum value of shear stress at the point. Verify the answer with Mohr’s circle. 15M
4. Consider at a point in given material, the 3 dimensional states of stresses is given by = = =10N/mm2, =20N/mm2 and = =10N/mm2. Compute the principle planes if the corresponding principle stresses are =37.3N/mm2, =-10N/mm2, =2.7N/mm2. 15M
Unit – III :
5. At a particular point in a structural member a two dimensional stress system exists where =60 N/mm2 =-40 N/mm2 and =50 N/mm2. If Young’s modulus E=200000 N/mm2 and Poisson’s ratio v=0.3.calculate the principal strains at the point and their inclinations to the plane on which acts; verify these answers using Mohr’s circle (graphical method). 15M
6. A bar of solid circular cross-section had a diameter of 50 mm and carries a torqueT, together with an axial tensile load P. A rectangular stain gauge rosette attached to the surface of the bar gave the following strain readings : =100×10-6, = -200×10-6 and =-300×106,where the gauges ‘a’ and ‘c’ are in line with, and perpendicular to, the axis of the bar respectively. If Young’s modulus=70 000N/mm2 and Poisson’s ratio v= 0.3, Calculate the values of T and P. 15M
Unit – IV :
7. a) State Castiglino’s theorem. 3M
b) Determine the deflection at point C due to load P using Castiglino’s theorem for the structure shown below Fig.4 12M
8. Use Maxwell’s reciprocal theorem to obtain the displacements at the point of loading and reaction for the beam shown below 15M
Unit – V :
9.Find the shear flows in the two cell box shown below. The horizontal webs have guages of t=0.040 in. Assume G is constant for all webs. The cross section is symmetrical about ahorizontal centerline . 15M
10. a) Explain briefly Bredt-Batho theory with neat sketch. 8M
b) Define:
i) Shear flow
ii) Shear center 7M