Description
Return a secant compression modulus.
Material and fixture mechanics depend on loading mode, geometry, reference state and constitutive assumptions. A secant modulus, Euler load or spring-energy term is a limited model contribution rather than validation of structural capacity, fatigue life or clinical device suitability.
Return a secant compression modulus.
When to use this tool
Use Hydrogel Compression Modulus One Slope when evaluating the stated benign bench mechanical or timing term.
How to use the tool and how it works
- Enter firstStress, secondStress, firstStrain, secondStrain. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read modulus. Use the output convention below.
Return a secant compression modulus. Require distinct supplied strain endpoints; modulus = (secondStress-firstStress)/(secondStrain-firstStrain).1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| firstStress | First Stress | Required. Finite number. |
| secondStress | Second Stress | Required. Finite number. |
| firstStrain | First Strain | Required. Finite number. |
| secondStrain | Second Strain | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| modulus | Modulus | Required. Finite number. |
{
"input": {
"firstStress": 10,
"secondStress": 30,
"firstStrain": 0.1,
"secondStrain": 0.2
},
"output": {
"modulus": 200
}
}Limitations and assumptions
- Strain is dimensionless and stress units set modulus units; signed or negative slopes are retained without establishing material stability or tissue performance.
- 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. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use verified material properties and an appropriate complete structural/test model with qualified engineering assessment for practical loading, lifetime or device decisions.
References
Similar or alternative tools
- Fixture Displacement Compliance Term
Return fixture displacement compliance.
- Elastomer Uniaxial Stretch Lateral Factor
Return lateral contraction under incompressible uniaxial stretch.