Description
Apply one linear free-expansion displacement to an explicit gap; negative output is interference, not structural approval.
Thermal calculations distinguish absolute temperature from temperature change, and heat capacity from specific heat. An ideal-gas or expansion term also assumes a compatible unit system and a stated process or material model. Temperature-dependent properties, constraints, and real-gas effects can require a broader treatment.
Apply one linear free-expansion displacement to an explicit gap; negative output is interference, not structural approval.
When to use this tool
Use Thermal Expansion Constrained Gap when you need this expansion, heat-capacity, or ideal-gas term under the stated material and process assumptions.
How to use the tool and how it works
- Enter initialGap, length, coefficient, temperatureChange. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read gap, closure, closed. Inspect closed before interpreting the associated values.
For nonnegative length return closure=length*coefficient*temperatureChange, gap=initialGap-closure, and closed=(gap<=0).1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| initialGap | Initial Gap | Required. Finite number. |
| length | Length | Required. Finite number; minimum 0. |
| coefficient | Coefficient | Required. Finite number. |
| temperatureChange | Signed temperature difference in kelvin, equivalently degrees Celsius. | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| gap | Signed difference under the stated formula and measurement unit. | Required. Finite number. |
| closure | Closure | Required. Finite number. |
| closed | Closed | Required. Boolean. |
{
"input": {
"initialGap": 3,
"length": 1000,
"coefficient": 0.001,
"temperatureChange": 2
},
"output": {
"gap": 1,
"closure": 2,
"closed": false
}
}Limitations and assumptions
- Use compatible length units and an inverse-temperature coefficient. Negative gaps represent modeled interference; restraint forces, buckling, and safe expansion-joint design are not calculated.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Signed zero is exported as zero.
Alternative or Complementary methods
Use temperature-dependent properties or an appropriate equation of state when the ideal approximation is inadequate. Keep pressure-volume units compatible with the chosen gas constant and distinguish kelvin from temperature differences.
References
Similar or alternative tools
- Thermal Expansion Volume First Order Term
Apply the isotropic first-order volumetric coefficient approximation 3*linearCoefficient.
- Thermal Capacity Weight Share
Return capacity=mass*specificHeat and share=capacity/totalCapacity.