Spherical Hoop Stress Thick-walled Section (External Pressure Only) Formula |
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| \( \sigma_h \;=\; \dfrac{ - p_e \cdot r_e^2 }{ r_e^2 - r_i^2 } \cdot \left( 1 + \dfrac{ r_i^2 }{ r^2 } \right) \) | ||
| Symbol | English | Metric |
| \( \sigma_h \) (Greek symbol sigma) = Spherical Hoop Stress | \(lbf\;/\;in^2\) | \(Pa\) |
| \( p_e \) = External pressure | \(lbf\;/\;in^2\) | \(Pa\) |
| \( r_e \) = External Radius | \(in\) | \(mm\) |
| \( r_i \) = Internal Radius | \(in\) | \(mm\) |
| \( r \) = Radius to Point of Intrest | \(in\) | \(mm\) |
