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COMPOSITES - Coggle Diagram

- - - - Critical length is dependent on the fiber diameter and the tensile strength
- - - - Two possible extremes
        
        Parallel alignment of the longitudinal axis of the fibres in a single direction
        
        Totally random alignment
    - - Better overall composite properties are realised when the fiber distribution is uniform
- - - - Large Particles
        
        Continuum mechanics is used
      - Dispersion-strengthened
        
        Particles are much smaller
        
        Strengthens and hardens metals and alloys
    - - Continuous (aligned)
      - Discontinuous (short)
        
        Aligned
        
        Randomly oriented
    - - Laminates
      - Sandwich Panels
      - Multilayered and designed to have low densities and high degrees of structural integrity
- - - - Ingredients: Portland cement, fine aggregate (sand), coarse aggregate (gravel),water
      - Aggregate particles are used as a filler to reduce cost
      - Sand particles should fill the void spaces between the gravel particles
      - Quite weak and brittle
    - - Strength of Portland concrete can be increased with reinforcement
        
        Steel rods, wires, bars or mesh
        
        Steel is suitable as its coefficient of thermal expansion is similar to that of concrete
        
        Residual compressive stress can also be used to reinforce concrete