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Download GTU BE/B.Tech 2017 Winter 7th Sem New 21701032170107 Mechanics Of Composite Materials Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2017 Winter 7th Sem New 21701032170107 Mechanics Of Composite Materials Previous Question Paper

This post was last modified on 20 February 2020

This download link is referred from the post: GTU BE/B.Tech 2017 Winter Question Papers || Gujarat Technological University


Enrolment No.

Subject Code: 2170103/2170107

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GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER-VII (NEW) EXAMINATION — WINTER 2017

Subject Name: Mechanics of Composite Materials

Date: 10/11/2017

Time: 10:30 AM TO 01:00 PM

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Total Marks: 70

Instructions:

  1. Attempt all questions.
  2. Make suitable assumptions wherever necessary.
  3. Figures to the right indicate full marks.
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Q.1 (a) What is composite material? Classify Constituent materials. 03
(b) What is FRP? Write characteristics and advantages of FRPs. 04
(c) Discuss in details anti symmetric laminates. 07
Q.2 (a) Explain Carbon fibres. 03
(b) The E-glass fibre in a polyester resin is 35% by weight. Given pf = 2.50 gm/ml and pm = 1 gm/ml. Calculate Vf and pc for the lamina. 04
(c) Explain the importance of composite materials in today’s world. Also mention the disadvantages and advantages as compared to other materials. 07
OR
(a) Explain A, B and D matrices in detail with proper derivation. 07
Q.3 (a) What are the advantages of fibres over other composite materials? 03
(b) Write a note on Poisson’s ratio. 04
(c) Derive equations for volume and weight fractions. 07
OR
(a) Write a note on Polymeric Matrix. 03
(b) Explain the stress strain relationship of a specially orthotropic material and Transversely Isotropic material. 04
(c) A high strength composite has the following elastic constants. E11 = 145 GPa, E22 = 12 GPa, G12 = 6 GPa, v12 = 0.25. Determine the transformed reduced stiffness matrix for the lamina with ply angle θ = 45°. 07
Q.4 (a) What is the need of Composite materials in the field of Aviation? Explain in brief. 03
(b) List down the basic assumptions made for laminate. 04
(c) For isotropic materials ‘explain transformation of stress and strain in detail with necessary derivation. 07
OR
(a) Name the methods to find properties of FRCs on the basis of its constituent elements. 03
(b) Compare Polyester resins with Epoxy resins. 04
(c) Write a note on applications of composite materials. 07
Q.5 (a) Write a note on Aramid fibres. 03
(b) Write a note on Equilibrium equations. 04
(c) Discuss in detail symmetric laminates. 07
OR
(a) What is the need of Fillers? Explain in details. 03
(b) Classify the types of laminate configuration. 04
(c) Compute [A] matrix for a [0/+45] laminate with the following laminate properties. E1 = 145GPa, E2 = 10.5 GPa, G12 = 7.5GPa, v12 = 0.28 Thickness of each lamina is 0.25 mm. 07

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This download link is referred from the post: GTU BE/B.Tech 2017 Winter Question Papers || Gujarat Technological University

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