Radial Displacement Thin-wall Section (External Pressure only) Formula |
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| \( \Delta_r \;=\; \dfrac{ -\; p_e \cdot r_e^2 \cdot r }{ \lambda \cdot \left( r_e^2 - r_i^2 \right) } \cdot \left( \left( 1 \;-\; \mu \right) + \left( 1 \;+\; \mu \right) \cdot \dfrac{ r_i^2 }{ r^2 } \right) \) | ||
| Symbol | English | Metric |
| \( \Delta_r \) = Radius Change | \( in \) | \( mm \) |
| \( p_e \) = External Pressure | \(lbf\;/\;in^2\) | \(Pa\) |
| \( r_e \) = External Radius | \( in \) | \( mm \) |
| \( r \) = Radius to Point of Intrest | \( in \) | \( mm \) |
| \( \lambda \) (Greek symbol lambda) = Elastic Modulus | \(lbf\;/\;in^2\) | \(Pa\) |
| \( r_i \) = Internal Radius | \( in \) | \( mm \) |
| \( \mu \) (Greek symbol mu) = Poisson's Ratio | \( dimensionless \) | \( dimensionless \) |
