GUJARAT TECHNOLOGICAL UNIVERSITY
SEMESTER-IV(NEW) — EXAMINATION - SUMMER 2019
--- Content provided by FirstRanker.com ---
Subject Code:2140101 Date:28/05/2019
Subject Name: Aircraft Structures I
Time:02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
--- Content provided by FirstRanker.com ---
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, Radius of gyration, moment of inertia, resilience, proof resilience, Young’s Modulus 07
--- Content provided by FirstRanker.com ---
Q.2 (a) Explain with figure : Point load, moment, Uniformly varying load 03
(b) Enlist the criteria to identify the geometric instability of the structure. 04
(c) Analyse the plane truss shown in below Figure using Tension Coefficient Method. 07
OR
--- Content provided by FirstRanker.com ---
(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
Q.3 (a) Explain the Principle of Super position with its statement. 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) A beam AB of 4.0 m span is simply supported at the ends and is loaded as shown in below figure. Determine (i) Deflection at C, (ii) Maximum deflection, and (iii) Slope at the end A. Take the value of E = 200 x 109 kN/m2 , I =20 x 10-6 m4. Use Macaulay’s Method. 07
--- Content provided by FirstRanker.com ---
OR
Q.3 (a) Suggest different way of reducing the effect of buckling in long column. 03
(b) Explain various methods of finding deflection. Mention assumptions required for deriving the differential equation. 04
(c) Derive euler’s buckling load for fixed free column. 07
--- Content provided by FirstRanker.com ---
Q.4 (a) Define: Time Period, Amplitude and Natural Frequency 03
(b) Differentiate between: Column and Strut 04
(c) Derive moment — curvature relationship for deflection of a beam along with suitable assumptions. 07
OR
Q.4 (a) Explain the principal of virtual work. 03
--- Content provided by FirstRanker.com ---
(b) Differentiate: Simple Truss, Compound Truss and Complex Truss with suitable sketch. 04
(c) A strut 2.5 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 3.5. Take E = 2.1 x 105 N/mm2. 07
Q.5 (a) Explain Euler’s theory of long column along with suitable assumption. 03
(b) A circular ring of radius ‘R’ is oscillating about one point on its periphery when it get slightly disturb form its original equilibrium position about that point. Derive an equation of time period (T) for the oscillation of ring. 04
(c) A solid circular shaft is subjected to a bending moment of 40 kN-m and a torque of 10 kN-m. Design the diameter of shaft according to maximum strain energy theory. Take stress at elastic limit 200 N/mm2 and Factor of safety 2. 07
--- Content provided by FirstRanker.com ---
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 105 N/mm2. 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/mm2 and Factor of safety as 2. 07
--- Content provided by FirstRanker.com ---
This download link is referred from the post: GTU BE 2019 Summer Question Papers || Gujarat Technological University
--- Content provided by FirstRanker.com ---