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Fiber arrangement Fiber arrangement is dictated by tradeoff of cost, flexibility, and performance.
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Composite materials At least two different materials put
together.
Mostly to obtain superior strength and stiffness. Why not just use
the stronger material? Fiber arrangement Fiber arrangement is
dictated by tradeoff of cost, flexibility, and performance.
Orthotropy Anisotropic materials with two orthogonal planes of
symmetry in properties. Ply is transversely isotropic. Large
differences between E1 and E2 Rule of Mixture for E1 Based on
volume fractions and =1- .
Equivalent to two springs in parallel. Example with
uncertainty
For a graphite fiber and resin matrix we have from the manufacturer
222 238 3.55 Our uncertainty in volume fraction is 0.6 0.7 What is
the uncertainty in 1 ? Transverse modulus Two springs in series
Obtain Other properties