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**Anna University Question Paper Code : 71268**

**M.E. DEGREE EXAMINATION, JUNE/JULY 2013.**

**Elective Engineering Design**

**ED 9254/ED 9541UED 9154 – COMPOSITE MATERIALS AND MECHANICS**

(Common to M.E. Computer Aided Design and M.E. Product Design and Development)

(Regulation 2009)

(Common to M.E. Computer Aided Design and M.E. Product Design and Development)

(Regulation 2009)

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**PART A — (10 x 2 = 20 marks)**

1. State the rule of mixtures.

2. Give two applications for composites in biomedical applications.

3. List the various types of laminates.

4. What are stress and moment resultants?

5. What are tensor polynomials?

6. Write the Von-Mises yield criterion for isotropic materials.

7. Distinguish between free and forced vibrations

8. Compare buckling by laminates and fibres

9. What are zero C.T.E. laminates?

10. What is meant by quasi-isotropic laminates?

**PART B — (5 x 16 = 80 marks)**

11. (a) (i) Enlist the advantages and disadvantages of composite materials. (8)

(ii) Discuss the desirable properties of matrix materials. (8)

Or

(b) (i) Explain pultrusion process with a neat sketch. (8)

(ii) Derive the rule of mixture for calculating Young's Modulus of an aligned fiber reinforced composite loaded parallel to the direction of fiber orientation. (8)

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