Quick Answer
Calculate Cylindrical Shell Combined Axial + External Pressure Local Buckling Resistance Ratio (ASME BPVC Section VIII Div 2, Annex 5)
Calculator
Result Interpretation
Cylindrical Shell Combined Axial + External Pressure Local Buckling Resistance Ratio (ASME BPVC Section VIII Div 2, Annex 5) Calculator computes Buckling Resistance Ratio in dimensionless using the defined engineering formula and the input values provided.
Worked Example
Verified calculation
Given:
- Critical Axial Compressive Load (Elastic) = 250000
- Critical External Pressure (Elastic) = 400000
- Actual Axial Compressive Force = 40000
- Actual External Pressure = 80000
Expected Result:
- Buckling Resistance Ratio = 0.25612496949731
Engineering Interpretation:
Under the given input conditions, the calculated result is: Buckling Resistance Ratio = 0.25612496949731 dimensionless.
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from automatically validated test cases.
Formula / Method
buckling resistance ratio = sqrt(pow(actual external pressure / Elastic, 2) + pow(actual axial compressive force / Elastic, 2))Formula family: formula_pressurevessel_cylindrical_shell_local_buckling_under_combined_axial_external_pressure_validator
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| P_actual | Actual External Pressure | INPUT | Actual External Pressure |
| N_actual | Actual Axial Compressive Force | INPUT | Actual Axial Compressive Force |
| P_cr | Critical External Pressure (Elastic) | INPUT | Critical External Pressure (Elastic) |
| N_cr | Critical Axial Compressive Load (Elastic) | INPUT | Critical Axial Compressive Load (Elastic) |
| buckling_resistance_ratio | Buckling Resistance Ratio | OUTPUT | Buckling Resistance Ratio |
Calculation Steps
- Enter the actual external pressure in Pa.
- Enter the actual axial compressive force in N.
- Enter the critical external pressure (elastic) in Pa.
- Enter the critical axial compressive load (elastic) in N.
- Step 1: Compute buckling resistance ratio.
- Read the buckling resistance ratio (dimensionless) from the results.
Engineering Summary
Calculate Cylindrical Shell Combined Axial + External Pressure Local Buckling Resistance Ratio (ASME BPVC Section VIII Div 2, Annex 5)
Frequently Asked Questions
What does this calculator calculate?
The Cylindrical Shell Combined Axial + External Pressure Local Buckling Resistance Ratio (ASME BPVC Section VIII Div 2, Annex 5) Calculator estimates Buckling Resistance Ratio based on the input parameters you provide
Why is actual external pressure important in this calculation?
actual external pressure is directly proportional to buckling resistance ratio. When you enter actual external pressure in Pa, the calculator uses it in the engineering formula to compute the output
How should I interpret the result buckling resistance ratio?
The calculator outputs buckling resistance ratio in dimensionless. The result is computed directly from the input values using the defined engineering formula
What units should I use for the inputs?
Enter each value in the units shown next to the input field: Actual External Pressure (Pa), Actual Axial Compressive Force (N), Critical External Pressure (Elastic) (Pa), Critical Axial Compressive Load (Elastic) (N). Make sure all inputs use the specified units for consistent results
What assumptions does this calculator use?
This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment
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