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Selection
Issues
· The quantities (E/ρ), (E/ρ2), and (E/ρ3) are all employed in material selection. The diagram
shows a log-log plot of Young's
modulus versus density for a wide range of
materials. The yellow zone is metal alloys, the blue polymers, the green composite
materials, and the brown woods. The red line represents a selected value
of (E/ρ). All materials above the line have a higher
value of this parameter, all below the line a lower value. If the selected
value of (E/ρ) is based on a design criterion, those materials
above the line exceed this criterion and merit further examination. |
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