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