Download GTU B.Tech 2020 Winter 7th Sem 2171916 Applied Mechanics Of Solid Question Paper

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Enrolment No.

GUJARAT TECHNOLOGICAL UNIVERSITY

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BE- SEMESTER-VII (NEW) EXAMINATION - WINTER 2020

Subject Code:2171916 Date:19/01/2021

Subject Name:Applied Mechanics of Solid

Time:10:30 AM TO 12:30 PM Total Marks: 56

Instructions:

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1. Attempt any FOUR questions out of EIGHT questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

1. 1. Enlist theory of failures and explain any one. (03)
   2. Define: 1) Body forces, 2) Surface forces (04)

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   3. Explain Mohr’s circle diagram for principal stresses. (07)
2. 1. Write the use of FOS in design. (03)
   2. List out the theories of failure and explain any one of them. (04)
   3. Derive equation of Principal stresses in 2D. (07)

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3. 1. Explain Circular Polariscope. (04)
   2. Explain the plane stress and plane strain. (03)
   3. Write and discuss incremental constitutive relation for elastic — plastic material. (04)

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4. 1. Also state basic assumptions for the theory. (07)
   2. Define the state of pure shear. (03)
   3. What do you mean by the principal of virtual-work. (04)
5. 1. Derive stress distribution using Airy’s stress function in simply supported beam subjected to pure bending. (07)

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   2. Explain Hooke’s law for elastic material. (03)
   3. Write a short note on octahedral stresses. (04)
6. 1. Explain stress strain relation in terms of plastic flow (07)
   2. Explain Bouschinger effect. (03)

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   3. Explain the Principle of virtual work and prove the relation for elastic solids. (04)
7. 1. Explain the stress integration of Drucker - Prager material model (07)
   2. Describe the term Strain Hardening. (03)
   3. State the term Bouschinger Effect for an elasto-plastic material (04)

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8. 1. Write a note on Druker’s stability postulate for stability of work-hardening materials. (07)
   2. What do you mean by principal of super position? (03)
   3. Explain the work hardening of a material. (04)

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9. 1. Explain Normality, Convexity and Uniqueness for an elastic solid. (07)