Design of Composite Materials and Structures


Contents

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  1. Introduction to Composite Materials & Structures.
  2. Tabulation of mechanical properties of fibres and matrices.

Section 1

Elastic Properties of Aligned Fibre Composites.
  1. Elasticity parallel and perpendicular to fibres.
  2. Packing of fibres, weight and volume fraction.
MathCad Exercises...
  1. Determine stiffness in a simple fibre composite
  2. Determine stiffness where there is more than one type of fibre

Section 2

Section 3

Strength of Aligned Fibre Composites.
  1. Elastic deformation only, brittle matrix fails fFirst
  2. Elastic deformation only, brittle fibre fails first
  3. Elastic-plastic matrix, brittle fibre fails first
MathCad Exercises...
  1. A simple strength calculator.
  2. Plot load-deflection response of user defined composite.

Effect of Orientation on the Properties of Aligned Fibre Composites.
  1. Tensor elasticity/Tensor rotations
  2. Elastic properties of a chopped strand mat - random fibre orientations.
  3. Mohrs circle and effect of orientation on strength
MathCad Exercises...
  1. Review the use of Mohr's Circle in 2-D and 3-D
  2. Define stiffness tensor as a function of orientation and extract the various elastic constants as a function of volume fraction and orientation.
  3. Calculation of stress and strain at any orientation and determine the strength of the composite.

Section 4

Section 5

Laminated Composites.
  1. Determination of the elastic properties of a laminate
  2. Determination of strength of a laminate - first ply failure.
MathCad Exercises...
  1. Calculate tensile and flexural stiffness of any laminate at any orientation.
  2. Calculation of stress and strain at any orientation.
  3. Calculate the strength at any orientation.
Sandwich Core Composite Structures.

use of laminate theory to predict properties of a simple sandwich core laminated composite structure

Section 6

Section 7

Honeycomb and Foam Cores
Design examples
  1. Pre-stressed concrete beams
  2. Nomex cored graphite-epoxy panels

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