Longitudinal Stress Thick-walled Section (External Pressure Only) Formula |
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| \( \sigma_l \;=\; \dfrac{ - p_e \cdot r_e^2 }{ r_e^2 - r_i^2 }\) | ||
| Symbol | English | Metric |
| \( \sigma_l \) (Greek symbol sigma) = longitudinal stress | \(lbf\;/\;in^2\) | \( Pa \) |
| \( p \) = external pressure | \(lbf\;/\;in^2\) | \( Pa \) |
| \( r_e \) = external radius | \( in \) | \( mm \) |
| \( r_i \) = internal radius | \( in \) | \( mm \) |
