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Material Property Converter

Convert elastic, density, strength, and thermal properties with isotropic relationship checks and ANSYS APDL or CalculiX text output.

Converted material set

Generic structural steel properties converted

Use the SI values for solver decks unless your model has a deliberately consistent alternative unit system. The APDL and CalculiX text is intended as editable setup support.

Converted material property table
Property	SI	Selected	Note
Young's modulus	2.00000e+11 Pa	2.00000e+2 GPa_modulus	Input or preset
Shear modulus	7.69231e+10 Pa	7.69231e+1 GPa_modulus	Input or preset
Bulk modulus	1.66667e+11 Pa	1.66667e+2 GPa_modulus	Input or preset
Poisson's ratio	0.3	0.3	Dimensionless
Density	7,850 kg/m^3	7,850 kg_m3	Mass density
Yield strength	2.50000e+8 Pa	2.50000e+2 MPa_stress	Reference value, not an automatic failure criterion
Ultimate tensile strength	4.00000e+8 Pa	4.00000e+2 MPa_stress	Reference value
Thermal conductivity	50 W/(m*K)	50 W_mK	Use only when thermal analysis needs it
Specific heat	486 J/(kg*K)	486 J_kgK	Temperature-dependent for many materials
Thermal expansion	1.20000e-5 1/K	1.20000e+1 microstrain_K	Linear thermal expansion coefficient

Elastic Relationship Visual

Warnings

Preset values are generic. Grade, temperature, manufacturing process, moisture, and standards can change material properties.
Elastic solve-for equations assume isotropic linear-elastic behavior and are not valid for anisotropic, plastic, damage, or nonlinear models.

Assumptions

Elastic relationships assume isotropic linear-elastic material behavior.
Solver text is a starter template and must be checked against the target analysis units and element formulation.
Strength values are references, not automatic material-model definitions.

Engineering Interpretation

Use the SI values for solver decks unless your model has a deliberately consistent alternative unit system. The APDL and CalculiX text is intended as editable setup support.

Elastic Formula and Substitution

No elastic solve-for selected.

E = 2.00000e+11 Pa

G = 7.69231e+10 Pa

K = 1.66667e+11 Pa

nu = 0.3

Notation

Formula notation table
Symbol	Meaning	Unit
E	Young's modulus	Pa
G	Shear modulus	Pa
K	Bulk modulus	Pa
nu	Poisson's ratio	dimensionless
rho	Density	kg/m^3
alpha	Linear thermal expansion coefficient	1/K

Calculation Steps

Normalize property valuesElastic, density, strength, and thermal values are normalized to SI solver-ready units.
Generate text templatesAPDL and CalculiX snippets are generated as editable starter text.

ANSYS APDL starter text

! ScholarTool material starter for Generic structural steel
! Verify all values against material standards before analysis.
MP,EX,1,2.0000000e+11
MP,PRXY,1,0.30000000
MP,DENS,1,7850.0000
MP,KXX,1,50.000000
MP,C,1,486.00000
MP,ALPX,1,0.000012000000
! Yield strength reference: 2.5000000e+8 Pa
! Ultimate tensile strength reference: 4.0000000e+8 Pa

CalculiX starter text

** ScholarTool material starter for Generic structural steel
** Verify all values against material standards before analysis.
*MATERIAL, NAME=SCHOLARTOOL_MATERIAL
*ELASTIC
2.0000000e+11, 0.30000000
*DENSITY
7850.0000
*CONDUCTIVITY
50.000000
*SPECIFIC HEAT
486.00000
*EXPANSION
0.000012000000
** Yield strength reference: 2.5000000e+8 Pa
** Ultimate tensile strength reference: 4.0000000e+8 Pa

What This Tool Does

Convert common FEA material properties between SI and Imperial units, solve compatible isotropic elastic relationships, and generate editable ANSYS APDL or CalculiX starter text.

For steel with E = 200 GPa and nu = 0.3, G is about 76.9 GPa.
For isotropic materials, K approaches infinity as Poisson's ratio approaches 0.5, so near-incompressible behavior needs careful element and solver choices.

Worked Example

With E = 200 GPa and Poisson's ratio = 0.3, the isotropic relationship G = E / [2(1 + nu)] gives about 76.9 GPa. That value is useful for checking whether a material card is internally consistent.

Common Mistakes

Using generic preset values instead of grade-, temperature-, and standard-specific material data.
Mixing SI and Imperial units in one solver input deck without a consistent unit system.
Treating yield strength as a plasticity model without defining the correct material law.
Applying isotropic relationships to orthotropic composites or nonlinear material models.

Limitations

Preset values are generic and vary by grade, temperature, process, and standard.
Elastic relationships assume isotropic linear-elastic behavior.
OpenFOAM outputs are not generated unless the property is physically appropriate for a continuum setup.

References

Roark's Formulas: Young, Budynas, and Sadegh, Roark's Formulas for Stress and Strain.
ANSYS APDL: ANSYS Mechanical APDL Material Reference.
CalculiX: CalculiX CrunchiX User's Manual, material definitions.

Can I paste the generated APDL or CalculiX text directly into production analysis?

Use it as starter text only. Verify the unit system, material standard, analysis type, and solver syntax before production use.

Does this generate OpenFOAM material files?

No broad OpenFOAM material output is generated because structural FEA properties do not automatically map to OpenFOAM case dictionaries.

What Poisson's ratio range is valid?

For isotropic linear-elastic relationships, Poisson's ratio must be greater than -1 and less than 0.5. Many common engineering materials fall between 0 and 0.5.

Related Tools

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Engineering disclaimer

This tool is intended for educational, estimation, and preliminary engineering use. Always verify critical engineering calculations with applicable standards, validated software, and qualified professional judgment before using results in real design, manufacturing, construction, safety, or compliance decisions.

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Last reviewed: 2026-06-17

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Property

Selected

Note

Young's modulus

2.00000e+11 Pa

2.00000e+2 GPa_modulus

Input or preset

Shear modulus

7.69231e+10 Pa

7.69231e+1 GPa_modulus

Input or preset

Bulk modulus

1.66667e+11 Pa

1.66667e+2 GPa_modulus

Input or preset

Poisson's ratio

0.3

Dimensionless

Density

7,850 kg/m^3

7,850 kg_m3

Mass density

Yield strength

2.50000e+8 Pa

2.50000e+2 MPa_stress

Reference value, not an automatic failure criterion

Ultimate tensile strength

4.00000e+8 Pa

4.00000e+2 MPa_stress

Reference value

Thermal conductivity

50 W/(m*K)

50 W_mK

Use only when thermal analysis needs it

Specific heat

486 J/(kg*K)

486 J_kgK

Temperature-dependent for many materials

Thermal expansion

1.20000e-5 1/K

1.20000e+1 microstrain_K

Linear thermal expansion coefficient

Symbol

Meaning

Unit

Young's modulus

Shear modulus

Bulk modulus

Poisson's ratio

dimensionless

rho

Density

kg/m^3

alpha

Linear thermal expansion coefficient

1/K

What This Tool Does

Convert common FEA material properties between SI and Imperial units, solve compatible isotropic elastic relationships, and generate editable ANSYS APDL or CalculiX starter text.

For steel with E = 200 GPa and nu = 0.3, G is about 76.9 GPa.

For isotropic materials, K approaches infinity as Poisson's ratio approaches 0.5, so near-incompressible behavior needs careful element and solver choices.

Common Mistakes

Using generic preset values instead of grade-, temperature-, and standard-specific material data.

Mixing SI and Imperial units in one solver input deck without a consistent unit system.

Treating yield strength as a plasticity model without defining the correct material law.

Applying isotropic relationships to orthotropic composites or nonlinear material models.

Engineering disclaimer