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AP) ABDUL KALAM TECHNOLOGICAL UNIVERSITY

SECOND SEMESTER M.TECH DEGREE EXAMINATION, APRIL/MAY 201 8
Mechanical Engineering

(Machine Desigo)
01ME6106 EXPERIMENTAL STRESS ANALYSIS

Answer any twofull questions from each part

Max. Marks: 60 Duration: 3 hours

PARTA

1. a. Explain Plane stress and Plain strain conditions in theory of Elasticity. (3)
b. What is a strain gauge? With neat sketches, explain the working ofa Mechanical (6) Strain
gauge.
2. a.Explain Cross sensitivity factor. Prove that Cross sensitivity factor ofa flat grid wire (6)
depends on geometry of the edge
b. Explain Gage sensitivities. (3)

3. a. Derive an expression for the principal strains using a Rectangular Rosette. Explain the (9)

procedure for drawing a Mohr's circle for the Rectangular rosette.

PART B
4. a. Explain how the temperature compensation can be effected in a potentiometer circuit
(4)
b. What are transducers? Discuss about any two transducers (3)
c. Explain Transient Response. (2)
5. a. What is a wave plate. Explain (3)

0. Explain how a wheat stone bridge circuit is used for dynamic strain gage applications. (6)
6. a. Derive an expression for the intensity ofthe emergent light from a circular polariscope (9) for

dark field arrangement

PART C
7. a. ൧൬3൩ different methods of Residual stress measurements. (7)
b. Explain the procedure involved in brittle coating method. (5)