Download PTU (I.K. Gujral Punjab Technical University Jalandhar (IKGPTU) ) BE/BTech Aero (Aerospace-Engg) 2020 March 6th Sem ASPE 312 Aerospace Structures Ii Previous Question Paper
Roll No. Total No. of Pages : 03
Total No. of Questions : 09
B.Tech.(Aerospace Engg.) (2012 Onwards) (Sem.?6)
AEROSPACE STRUCTURES-II
Subject Code : ASPE-312
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.
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 :
a) How does the transverse load affect the buckling load of a beam column?
b) Give some typical examples of beam column in Aerospace structure with neat sketches.
c) Explain the safe-line design and fail safe design.
d) Draw chordwise and spanwise load distribution of a typical wing.
e) ?Aircraft structure is necessarily statically indeterminate?. Explain why?
f) For a fixed-free column, write down the boundary conditions at the two ends.
g) Write down the behavior of Riveted joints.
h) Define the shear center and shear flow.
i) Explain: Beam-Ties.
j) Explain Neuber Tube with appropriate example.
SECTION-B
2. Explain the concept of V-N diagram. What are the limit load factors as depicted in the V-N
diagram?
FirstRanker.com - FirstRanker's Choice
1 | M-72457 (S2)-2060
Roll No. Total No. of Pages : 03
Total No. of Questions : 09
B.Tech.(Aerospace Engg.) (2012 Onwards) (Sem.?6)
AEROSPACE STRUCTURES-II
Subject Code : ASPE-312
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.
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 :
a) How does the transverse load affect the buckling load of a beam column?
b) Give some typical examples of beam column in Aerospace structure with neat sketches.
c) Explain the safe-line design and fail safe design.
d) Draw chordwise and spanwise load distribution of a typical wing.
e) ?Aircraft structure is necessarily statically indeterminate?. Explain why?
f) For a fixed-free column, write down the boundary conditions at the two ends.
g) Write down the behavior of Riveted joints.
h) Define the shear center and shear flow.
i) Explain: Beam-Ties.
j) Explain Neuber Tube with appropriate example.
SECTION-B
2. Explain the concept of V-N diagram. What are the limit load factors as depicted in the V-N
diagram?
2 | M-72457 (S2)-2060
3. Find the reactions on member ABC and the loads in other members of the beam-truss struc-
ture (See Figure 1). Note that ABC is a continuous beam.
Fig. 1
4. The end of the semi-circular member shown in Figure 2 is subjected to Torque T. What is
the twist of the end A? The member is circular in section.
Fig. 2
5. The 2-cell tube indicated in Figure.3 is subjected to a clockwise twisting moment of
1000 Ncm. Determine the shear flows in the walls of the tube. All other wall thickness is
1 mm.
Fig. 3
6. Comments on the following :
a) Future Airworthiness requirement.
b) Two-bay-crack criteria
c) Widespread fatigue damage
50cm 50cm 50cm
5KN
A
B C
50cm
T
A
?
O
Y
X
r
t = 2mm
20 cm
20 cm
20 cm
FirstRanker.com - FirstRanker's Choice
1 | M-72457 (S2)-2060
Roll No. Total No. of Pages : 03
Total No. of Questions : 09
B.Tech.(Aerospace Engg.) (2012 Onwards) (Sem.?6)
AEROSPACE STRUCTURES-II
Subject Code : ASPE-312
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.
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 :
a) How does the transverse load affect the buckling load of a beam column?
b) Give some typical examples of beam column in Aerospace structure with neat sketches.
c) Explain the safe-line design and fail safe design.
d) Draw chordwise and spanwise load distribution of a typical wing.
e) ?Aircraft structure is necessarily statically indeterminate?. Explain why?
f) For a fixed-free column, write down the boundary conditions at the two ends.
g) Write down the behavior of Riveted joints.
h) Define the shear center and shear flow.
i) Explain: Beam-Ties.
j) Explain Neuber Tube with appropriate example.
SECTION-B
2. Explain the concept of V-N diagram. What are the limit load factors as depicted in the V-N
diagram?
2 | M-72457 (S2)-2060
3. Find the reactions on member ABC and the loads in other members of the beam-truss struc-
ture (See Figure 1). Note that ABC is a continuous beam.
Fig. 1
4. The end of the semi-circular member shown in Figure 2 is subjected to Torque T. What is
the twist of the end A? The member is circular in section.
Fig. 2
5. The 2-cell tube indicated in Figure.3 is subjected to a clockwise twisting moment of
1000 Ncm. Determine the shear flows in the walls of the tube. All other wall thickness is
1 mm.
Fig. 3
6. Comments on the following :
a) Future Airworthiness requirement.
b) Two-bay-crack criteria
c) Widespread fatigue damage
50cm 50cm 50cm
5KN
A
B C
50cm
T
A
?
O
Y
X
r
t = 2mm
20 cm
20 cm
20 cm
3 | M-72457 (S2)-2060
SECTION-C
7. The plane structure shown in Figure 4 consists of a uniform continuous beam ABC pinned
to a fixture at A and supported by a framework of pin-jointed members. All members other
than ABC have the same cross-sectional area A. For ABC, the area is 4A and the second
moment of area for bending is Aa
2
/16. The material is the same throughout. Find (in terms
of w, A, a and Young?s modulus E) the vertical displacement of point D under the vertical
loading shown. Ignore shearing strains in the beam ABC
Fig. 4
8. The deflection of a square plate of side a which supports a lateral load represented by the
function q(x, y) is given by
0
3
cos cos ?
x y
W W
a a
? ?
where x and y are referred to axes whose origin coincides with the centre of the plate and
W
0
is the deflection at the centre. If the flexural rigidity of the plate is D and Poisson?s ratio
is v determine the loading function q, the support conditions of the plate, the reactions at
the plate corners and the bending moments at the centre of the plate.
9. Compare shear stress and torsional stiffness of the closed section thin square channel and
the open section thin square channel with side a=10 cm and thickness t=1.6 mm as shown
in Figure 5 when torsional moment M
t
= 10 KN-m is applied. Where shear modulus of the
channel, G=80GPa.
Fig. 5
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
4a 4a 4a
G F E
A B
C
3wa
D
3a
1.5w/unit length
t
a
a
t
a
a
t
slit
FirstRanker.com - FirstRanker's Choice
This post was last modified on 21 March 2020