Structural material
Where it is
Section titled “Where it is”Not a setup-tree node. Embedded in the application.
Controls
Section titled “Controls”MATERIAL
Section titled “MATERIAL”Browse…
Section titled “Browse…”- Control: action (
ToolButton2)
Young’s modulus E
Section titled “Young’s modulus E”- Control: value (
ValueField) - Unit: GPa
- Value modes: none (plain entry)
Stiffness. Steel is about 210 GPa, aluminium 70.
Poisson’s ratio ν
Section titled “Poisson’s ratio ν”- Control: value (
ValueField) - Value modes: none (plain entry)
How much it bulges when compressed. Metals are near 0.3; 0.5 is incompressible and cannot be solved.
Density ρ
Section titled “Density ρ”- Control: value (
ValueField) - Unit: kg/m³
- Value modes: none (plain entry)
The in-app guidance depends on the case:
- Modal frequencies scale with sqrt(E/ρ), so this one decides the answer.
- Read by a modal analysis and by gravity loads; ignored by a static solve without one.
Ultimate strength
Section titled “Ultimate strength”- Control: value (
ValueField) - Unit: MPa
- Value modes: none (plain entry)
- Shown when:
StructuralState.analysis === "Fatigue"
The high-stress end of the S-N line, taken at the low cycle count below.
…at cycle count
Section titled “…at cycle count”- Control: value (
ValueField) - Value modes: none (plain entry)
- Shown when:
StructuralState.analysis === "Fatigue"
1000 is the usual convention for the ultimate-strength point of the S-N line.
Endurance limit
Section titled “Endurance limit”- Control: value (
ValueField) - Unit: MPa
- Value modes: none (plain entry)
- Shown when:
StructuralState.analysis === "Fatigue"
The low-stress end, at the high cycle count below. Defaulted to half the ultimate, which is the usual estimate for steel — aluminium has no true endurance limit and this will be optimistic.
…at cycle count
Section titled “…at cycle count”- Control: value (
ValueField) - Value modes: none (plain entry)
- Shown when:
StructuralState.analysis === "Fatigue"
1e6 is the usual convention for steel’s endurance-limit point. A material with no true endurance limit needs a real number here instead — a million cycles read as infinite life for one is the optimistic case the field above already warns about.
Yield strength
Section titled “Yield strength”- Control: value (
ValueField) - Unit: MPa
- Value modes: none (plain entry)
- Shown when:
StructuralState.analysis === "NonlinearStatic"
Where the material stops returning to its original shape. Mild steel is about 250 MPa. Zero means the library publishes none for this material — state it here.
Post-yield slope
Section titled “Post-yield slope”- Control: value (
ValueField) - Unit: GPa
- Value modes: none (plain entry)
- Shown when:
StructuralState.analysis === "NonlinearStatic"
How much stress still rises after yield, as a modulus rather than a stress. Usually near E/100 — 2.1 GPa for steel. It must be less than E, or the part would be stiffer after yielding.
Problems reported against this step
Section titled “Problems reported against this step”The application reports no problems against this step.
… marks a value the application computes at run time, so the source carries no fixed text for it.