Exam Details
Subject | Strength of Materials | |
Paper | ||
Exam / Course | B.Tech in Aerospace Engineering (BTAE) | |
Department | School of Engineering & Technology (SOET) | |
Organization | indira gandhi national open university | |
Position | ||
Exam Date | June, 2015 | |
City, State | new delhi, |
Question Paper
Draw the typical stress strain diagram for mild steel indicating the salient points.
Determine the stresses in various segments of the circular bar shown in Figure 1. Also compute the total elongation of the bar. Take modulus of elasticity of the bar material as 195·0 GPa.
<img src='./qimages/15074-1b.jpg'>
2. A tapering round bar, whose diameter is varying from d1 to d2, is subjected to axial load of P. If the length of the bar is L and Young's modulus of elasticity of the bar material is then prove that the total elongation of the bar is given by 4PL/n E d1 d2
3. Determine the change in the volume of a steel bar of 25 mm diameter and 500 mm length, when subjected to a tensile stress of 200 MPa. Take Es =200 GPa and Poisson's ratio =0·30.
4. For the rectangular block of material subjected to stresses as shown in Figure determine the direction of principal planes and magnitude of principal stresses.
<img src='./qimages/15074-4.jpg'>
5. Draw the BMD and SFD for the simple beam shown in Figure 3.
<img src='./qimages/15074-5.jpg'>
6. For a given stress determine the ratio of moment of resistance of a square beam placed with two sides horizontal and with a diagonal horizontal as shown in Figure 4.
<img src='./qimages/15074-6.jpg'>
7. Determine and show the shear stress distribution over a rectangular beam section and prove that the maximum shear stress at Neutral Axis is 50% more than the mean shear stress.
Define the term strain energy due to normal stress and proof resilience.
A mild steel bar of diameter 30 mm and length 2·4 m is subjected to a tensile load of 90 kN. Find the strain energy stored in .the bar, if the load is applied gradually. Also determine the modulus of resilience, if proportional limit =220 MPa. Take E =200 GN/m^2.
9. Draw the typical shear stress distribution for the following beam sections:
<img src='./qimages/15074-9.jpg'>
10. Define any four of the following terms:
Bulk modulus
Flitched beams
State of pure shear
Principal planes
Section modulus
Castigliano's first theorem
Determine the stresses in various segments of the circular bar shown in Figure 1. Also compute the total elongation of the bar. Take modulus of elasticity of the bar material as 195·0 GPa.
<img src='./qimages/15074-1b.jpg'>
2. A tapering round bar, whose diameter is varying from d1 to d2, is subjected to axial load of P. If the length of the bar is L and Young's modulus of elasticity of the bar material is then prove that the total elongation of the bar is given by 4PL/n E d1 d2
3. Determine the change in the volume of a steel bar of 25 mm diameter and 500 mm length, when subjected to a tensile stress of 200 MPa. Take Es =200 GPa and Poisson's ratio =0·30.
4. For the rectangular block of material subjected to stresses as shown in Figure determine the direction of principal planes and magnitude of principal stresses.
<img src='./qimages/15074-4.jpg'>
5. Draw the BMD and SFD for the simple beam shown in Figure 3.
<img src='./qimages/15074-5.jpg'>
6. For a given stress determine the ratio of moment of resistance of a square beam placed with two sides horizontal and with a diagonal horizontal as shown in Figure 4.
<img src='./qimages/15074-6.jpg'>
7. Determine and show the shear stress distribution over a rectangular beam section and prove that the maximum shear stress at Neutral Axis is 50% more than the mean shear stress.
Define the term strain energy due to normal stress and proof resilience.
A mild steel bar of diameter 30 mm and length 2·4 m is subjected to a tensile load of 90 kN. Find the strain energy stored in .the bar, if the load is applied gradually. Also determine the modulus of resilience, if proportional limit =220 MPa. Take E =200 GN/m^2.
9. Draw the typical shear stress distribution for the following beam sections:
<img src='./qimages/15074-9.jpg'>
10. Define any four of the following terms:
Bulk modulus
Flitched beams
State of pure shear
Principal planes
Section modulus
Castigliano's first theorem
Other Question Papers
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Subjects
- Aerodynamics- I
- Aerodynamics- II
- Aircraft Design/Launch Vehicle/ Rocket Design
- Aircraft Instruments
- Aircraft Safety and Maintenance Engineering
- Aircraft Structures
- Aircraft Systems And Airworthiness Requirements
- Applied Chemistry
- Applied Physics
- Basic Control Theory
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- Composite Materials
- Computer Fundamentals
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- Mechanics Design
- Propulsion- I
- Propulsion- II
- Rocket Propulsion
- Space Dynamics
- Strength of Materials
- Technical Writing and Communication Skills
- Workshop Technology