Page 109 - 3D Fibre Reinforced Polymer Composites
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98 30 Fibre Reinforced Polymer Composites
(a) with resin
(b) Resin removed
Figure 4.18 An illustrative example of a full 3D F% model of a unit cell to a 3D
orthogonal woven composite material (Tan, 1999)
To evaluate the overall properties for a 3D woven composite material, six independent
displacement fields should be applied respectively to the finite element model of the
unit cell using the Lagrange multiplier method (see Tan et al., 2000b). The six
displacement fields yield six independent overall uniform strain fields, e.g., E, = 0.001,
