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Anna University Question Paper Code :11036
B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2012.
Eighth Semester
Aeronautical Engineering
AE 2451/AE 81/AE 1402/080180044 - COMPOSITE MATERIALS AND STRUCTURES
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PART A — (10 x 2 = 20 marks)
1. Write the simple definition of composite and indicate the three criteria which are supposed to be satisfied before a material called a composite.
2. Explain difference between fibers and whiskers.
3. Define micro mechanics and macro mechanics.
4. For a composite Et, 100 Gpa, = 10 Gpa. Calculate the percentage increase in load carrying capacity of a uniaxial bar when the fibre increased from 70% to 80%.
5. What are the main factors that are peculiar to laminate strength analysis?
6. List the assumption made in classical laminated theory.
7. List down the advantages of sandwich construction.
8. Why is low modulus of honey comb used in the middle of the sandwich beam?
9. What are prepergs?
10. Write a short note on "Braiding Process".
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