Quick Answer
Calculate ASTM D395 Method B O-Ring Compression Set Prediction
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Find Engineering Solutions →Result Interpretation
ASTM D395 Method B O-Ring Compression Set Prediction calculator computes Compression set in % using the defined engineering formula and the input values provided. Compression set is expressed in %. No universal acceptance threshold is defined by this calculator.
Worked Example
Verified calculation
Given:
- Temperature-dependent rate constant = 0.025
- Test duration = 22
- Initial compressive strain ratio (delta_h / h0) = 0.25
- Strain exponent = 1.8
Expected Result:
- Compression set = 4.4344784699142
Engineering Interpretation:
Under the given input conditions, the calculated result is: Compression set = 4.4344784699142 %.
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from deterministically validated test cases.
Formula / Method
compression set = 100.0 * (1.0 - exp(-temperature-dependent rate constant * test duration * pow(delta_h / h0, strain exponent)))Formula family: formula_sealing_o_ring_compression_set_prediction_per_astm_d395_method_b
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| k_temp | Temperature-dependent rate constant | INPUT | Temperature-dependent rate constant |
| t_hours | Test duration | INPUT | Test duration |
| strain_ratio | Initial compressive strain ratio (delta_h / h0) | INPUT | Initial compressive strain ratio (delta_h / h0) |
| n_exp | Strain exponent | INPUT | Strain exponent |
| compression_set | Compression set | OUTPUT | Compression set |
Calculation Steps
- Enter the temperature-dependent rate constant in 1/h.
- Enter the test duration in h.
- Enter the initial compressive strain ratio (delta_h / h0) in 1.
- Enter the strain exponent in 1.
- Step 1: Compute compression set.
- Read the compression set (%) from the results.
Engineering Summary
Calculate ASTM D395 Method B O-Ring Compression Set Prediction
Frequently Asked Questions
What does this calculator calculate?
The ASTM D395 Method B O-Ring Compression Set Prediction calculator estimates Compression set based on the input parameters you provide
Why is temperature-dependent rate constant important in this calculation?
temperature-dependent rate constant is used directly in the calculation of compression set. Its effect on the result depends on the complete formula and the values of the other inputs.. When you enter temperature-dependent rate constant in 1/h, the calculator uses it in the engineering formula to compute the output
How should I interpret the result compression set?
The calculator outputs compression set in %. 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: Temperature-dependent rate constant (1/h), Test duration (h). 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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