Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 4th Sem New 2140101 Aircraft Structures I Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? IV (New) EXAMINATION ? WINTER 2019
Subject Code: 2140101 Date: 17/12/2019
Subject Name: Aircraft Structures I
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARK
Q.1 (a) Define : Stress,Strain,Shear Modulus 03
(b) State and Explain ? Maxwell?s Reciprocal Theorem ? 04
(c) Define the following term : Strain Energy,Radious of gyration,moment of
inertia,resilience,proof resilience,Young?s Modulus
07
Q.2 (a) Explain the principal of superposition with its statement. 03
(b) Enlist the criteria to identify the geometric instability of the structure 04
(c) Define the terms: Static Indeterminacy and Kinematic Indeterminacy. Find the
S.I and K.I of a plane frame as shown in below Figure
07
OR
(c) Find static and kinematic indeterminacy of structures given in below figure.
07
Q.3 (a) Suggest different way of reducing the effect of buckling in long column. 03
(b) Define the term Effective Length of Column. Draw the probable sketch which
represent the buckled shape of the column with different support conditions.
04
(c) Enlist various methods to find slope and deflection. Mention the assumptions
required for deriving the differential equation.
07
OR
Q.3 (a) Differentiate between short and long column. 03
(b) Enlist various methods to find slope and deflection. Mention the assumptions
required for deriving the differential equation.
04
(c) Derive euler?s buckling load for fixed pinned column. 07
Q.4 (a) Explain Simple Harmonic Motion for the vibratory body. 03
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? IV (New) EXAMINATION ? WINTER 2019
Subject Code: 2140101 Date: 17/12/2019
Subject Name: Aircraft Structures I
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARK
Q.1 (a) Define : Stress,Strain,Shear Modulus 03
(b) State and Explain ? Maxwell?s Reciprocal Theorem ? 04
(c) Define the following term : Strain Energy,Radious of gyration,moment of
inertia,resilience,proof resilience,Young?s Modulus
07
Q.2 (a) Explain the principal of superposition with its statement. 03
(b) Enlist the criteria to identify the geometric instability of the structure 04
(c) Define the terms: Static Indeterminacy and Kinematic Indeterminacy. Find the
S.I and K.I of a plane frame as shown in below Figure
07
OR
(c) Find static and kinematic indeterminacy of structures given in below figure.
07
Q.3 (a) Suggest different way of reducing the effect of buckling in long column. 03
(b) Define the term Effective Length of Column. Draw the probable sketch which
represent the buckled shape of the column with different support conditions.
04
(c) Enlist various methods to find slope and deflection. Mention the assumptions
required for deriving the differential equation.
07
OR
Q.3 (a) Differentiate between short and long column. 03
(b) Enlist various methods to find slope and deflection. Mention the assumptions
required for deriving the differential equation.
04
(c) Derive euler?s buckling load for fixed pinned column. 07
Q.4 (a) Explain Simple Harmonic Motion for the vibratory body. 03
2
(b) Differentiate: Simple Truss, Compound Truss and Complex Truss with suitable
sketch.
04
(c) A strut 3 m long is 50 mm in diameter. One end of the strut is fixed while its
other end is hinged. Find the safe load for the member using Euler?s Theory,
allowing Factor of Safety as 3. Take E = 2.1 x 10
5
N/ ????
2
.
07
OR
Q.4 (a) Derive the strain energy equation for a member subjected to shear force. 03
(b) Differentiate: Simple Truss, Compound Truss and Complex Truss with suitable
sketch
04
(c) Calculate the total strain energy stored in a 6 m long cantilever beam subjected
to a point load of 80 kN at free end due to flexure and shear. The cross section of
a beam is rectangle having dimension 120 mm x 300 mm. Take E = 180 kN/ ????
2
and G = 80 kN/ ????
2
.
07
Q.5 (a) Define: Time Period, Amplitude and Natural Frequency 03
(b) Derive the differential equation of deflected curve with neat sketch. 04
(c) Find the internal forces in truss members for a plane truss as shown in below fig.
using Method of Tension Co-efficient.
07
OR
Q.5 (a) Explain De?alembert Principal. 03
(b) A hollow rectangular column having outside dimensions 200 mm x 150 mm and
inside dimensions 150 mm x 100 mm. It?s length is 6.0 m and both ends are fixed.
Find the Euler?s Load if E = 2 x 10
5
N/ ????
2
.
04
(c) A solid circular shaft is subjected to a bending moment of 30 kN-m and a torque
of 15 kN-m. Design the diameter of the shaft according to maximum principle
stress theory. Take stress at elastic limit as 200 N/ ????
2
and Factor of safety as 2.
07
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This post was last modified on 20 February 2020