Composite Beam Neutral Axis Calculator
Elastic modulus-weighted composite neutral axis, perfect bond/linear elastic assumption explicit. Caller independently establishes units, regime, calibration and applicability; this does not establish design-code compliance, authenticity, operational safety, treatment efficacy or a validated forecast.
Description
A composite neutral axis weights layer positions by axial stiffness.
A composite neutral axis weights layer positions by axial stiffness.1
Areas, moduli and centroid coordinates must use a consistent section reference. Use Composite Beam Neutral Axis Calculator to evaluate the supplied inputs under the specific model below.
When to use Composite Beam Neutral Axis Calculator
Use Composite Beam Neutral Axis Calculator to evaluate the supplied inputs under the specific model below. Establish the units, measurement scope and applicable model or recipe assumptions before entering values.
How to use Composite Beam Neutral Axis Calculator and understand its results
- Establish the units, measurement scope and applicable model or recipe assumptions before entering values.
- Enter Layer areas m2, Layer centroid y m, Layer elastic moduli pa using the field table and validation rules below, then run the tool.
- Read Transformed neutral axis y m and interpret units, signs, ordering and placeholders as explained below.
- If the tool reports an input error, correct that field and rerun. A successful false result, empty match list or unknown-evidence placeholder has the specific meaning described here; check the limitations before applying the result.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| layerAreasM2 | Layer areas m2 | array of number | Required; constraints below |
| layerCentroidYM | Layer centroid y m | array of number | Required; constraints below |
| layerElasticModuliPa | Layer elastic moduli pa | array of number | Required; constraints below |
Enter aligned nonempty positive layer areas in m² and elastic moduli in Pa, with finite signed layer-centroid y coordinates in m measured from one reference. Compute each EA stiffness and take its weighted centroid. The result describes an ideal transformed section and does not check composite connection or nonlinear behavior.
neutralAxisYM = Σ(E[i]×A[i]×y[i])/Σ(E[i]×A[i]) Field order, units and branch conditions follow the implementation explanation above.
| Output field | Meaning | Value type |
|---|---|---|
| transformedNeutralAxisYM | Transformed neutral axis y m | number |
{
"input": {
"layerAreasM2": [
1,
2
],
"layerCentroidYM": [
0,
3
],
"layerElasticModuliPa": [
2,
1
]
},
"output": {
"transformedNeutralAxisYM": 1.5
}
}Limitations and assumptions
Areas, moduli and centroid coordinates must use a consistent section reference. Apply the exact scope and assumptions described above.
All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse arrays fail validation. Domain-specific bounds, alignments and supported tokens are stated above; extremely large inputs or outputs can also be rejected. These errors differ from successful results such as false, no matches or unknown evidence.
Alternative or Complementary methods
Use Beam Warping Torsion Calculator for a related task: Warping normal stress depends on bimoment and a section's sectorial coordinate.
Use Composite Slab Shear Bond Calculator for a related task: An m-k shear-bond model combines experimentally supplied coefficients with slab geometry.
References
-
Composite Beam Neutral Axis Calculator — tool.io
Similar or alternative tools
- Beam Warping Torsion Calculator
Warping normal stress depends on bimoment and a section's sectorial coordinate.
- Composite Slab Shear Bond Calculator
An m-k shear-bond model combines experimentally supplied coefficients with slab geometry.