04000CH466052001
Pages: 2

Reg No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
B.Tech S8 (Hons) Exam May 2020

Course Code: CH466
Course Name: COMPOSITE MATERIALS
Max. Marks: 100 Duration: 3 Hours
PARTA
Answer any two full questions, each carries 15 marks. Marks
1 a) Explain the constituents in a polymeric composite with examples. (7)

0) Explain the defects in composite manufacturing and the methods used 10 (8)
minimize these defects.
2 a) Explain the advantages of composite in structural design. (4)
b) Explain the applications of composite in (i) medical and (ii) transportation (7)
industries.
c) List out any four common terms with definitions used in composite (4)
manufacturing.
3 a) Explain the (1) Pultrusion process and (ii) Resin Transfer moulding process used (10)
in the manufacture of polymeric composites.
b) Differentiate thermoplastic and thermoset matrix composites with examples. (5)
PART B
Answer any two full questions, each carries 15 marks.
4 a) Explain the Halpin —Tsai equations used in fiber composites for calculating the (7)

elastic constants.
b) Explain thermal expansion coefficients and moisture expansion coefficients in (8)
unidirectional composites with equations.

5 a) Derive an expression for transverse stiffness of a unidirectional reinforced (5)

composite.
b) Derive Hook’s law to unidirectional composites. (5)
c) Explain the importance of arrangement of lamina in a laminate. (5)
6 a) Explain Classical Laminate Theory of composites. (6)
b) Differentiate micromechanics and macromechanics of composites. (4)

c) Explain how stress-strain relations vary in a unidirectional composite when (5)

subjected to moisture loads.

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