Exam Details
| Subject | Experimental Stress Analysis | |
| Paper | ||
| Exam / Course | Diploma in Mechanical Engineering (DMEVI)& B.Tech. MECHANICAL ENGINEERING 1-4 (BTMEVI) | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | June, 2016 | |
| City, State | new delhi, |
Question Paper
No. of Printed Pages: 2 IBIMEE-OOSI
B.Tech. -VIEP -MECHANICAL ENGINEERING
(BTMEVI)
Term-End Examination
June, 2016
BIMEE-005 EXPERIMENTAL STRESS ANALYSIS
Time hours Maximum Marks: 70
Note: Attempt any seven questions. All questions carry equal marks. Assume any missing data suitably. Use of scientific calculator is permitted.
1. Describe, with the help of neat diagram, any two types of mechanical strain gauges. 10
2. Stresses acting at a point P in a body are given as Ox 30 Oy -10 Oz =10 kN/cm^2 and txy tyz tzx 10 kN/cm^2. Determine the normal and shearing stress on a plane that is equally inclined to all the three axes. 10
3. Why are Wheatstone bridge circuits preferred over potentiometer circuits in static strain measurements Explain. Differentiate between bonded and unbonded gauges. 10
4. Sketch a circular polariscope. Explain the effects of a stressed model and the fringes obtained in it. 10
5. What are the various types of optical strain gauges Explain with a neat sketch the Tuckerman gauge. 10
6. Explain the Tardy's compensation method in detail. Why is this method preferred over other methods? 10
7. An elastic body under the action of external forces has a displacement field given by
(x2 i j 2y) k . Determine the principal strains at and the direction of the minimum principal strain. 10
8. Derive the relation for stress-optic law in terms of relative retardation. 6
List the photoelastic materials with their specific features. 4
9. Write short notes on the following: 10
Electromagnetic strain gauge
Calibration of strain gauges
10. Explain the brittle coating method in detail. What are the advantages and limitations of this method? 10
B.Tech. -VIEP -MECHANICAL ENGINEERING
(BTMEVI)
Term-End Examination
June, 2016
BIMEE-005 EXPERIMENTAL STRESS ANALYSIS
Time hours Maximum Marks: 70
Note: Attempt any seven questions. All questions carry equal marks. Assume any missing data suitably. Use of scientific calculator is permitted.
1. Describe, with the help of neat diagram, any two types of mechanical strain gauges. 10
2. Stresses acting at a point P in a body are given as Ox 30 Oy -10 Oz =10 kN/cm^2 and txy tyz tzx 10 kN/cm^2. Determine the normal and shearing stress on a plane that is equally inclined to all the three axes. 10
3. Why are Wheatstone bridge circuits preferred over potentiometer circuits in static strain measurements Explain. Differentiate between bonded and unbonded gauges. 10
4. Sketch a circular polariscope. Explain the effects of a stressed model and the fringes obtained in it. 10
5. What are the various types of optical strain gauges Explain with a neat sketch the Tuckerman gauge. 10
6. Explain the Tardy's compensation method in detail. Why is this method preferred over other methods? 10
7. An elastic body under the action of external forces has a displacement field given by
(x2 i j 2y) k . Determine the principal strains at and the direction of the minimum principal strain. 10
8. Derive the relation for stress-optic law in terms of relative retardation. 6
List the photoelastic materials with their specific features. 4
9. Write short notes on the following: 10
Electromagnetic strain gauge
Calibration of strain gauges
10. Explain the brittle coating method in detail. What are the advantages and limitations of this method? 10
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