1. Reference problem#

The sole purpose of these tests is to validate the non-regression of the laws.

1.1. Geometry#

The tests are based on a unit cubic finite element with 8 knots.

1.2. Property of the materials#

Attention: the material parameters used in these tests are not realistic. They are only used to test laws in a computer way, they should not be used in real calculations.

Material properties are specified in DEFI_MATERIAU with the names FLUA_PORO_BETON, ENDO_PORO_BETON, FLUA_ENDO_PORO, and RGI_BETON.

1.3. Boundary conditions#

Perpendicular movements along three faces of the cube are blocked for all models.

An external uniaxial load is applied in the following models:

  • Modeling A: \(50\mathit{MPa}\)

  • C modeling: \(9\mathit{MPa}\)

  • D modeling: \(1\mathit{MPa}\)

  • E modeling: \(\mathrm{0,01}\mathit{MPa}\)

An imposed displacement is applied in the following models:

  • B modeling:

  • 1.Traction: \({\mathrm{\epsilon }}_{\mathit{xx}}=\mathrm{2,0}\times {10}^{-3}\)

  • 2.Closure: \({\mathrm{\epsilon }}_{\mathit{xx}}=0\)

  • 3.Traction: \({\mathrm{\epsilon }}_{\mathit{xx}}=\mathrm{1,0}\times {10}^{-3}\)

  • 4.Compression: \({\mathrm{\epsilon }}_{\mathit{xx}}=-\mathrm{1,0}\times {10}^{-3}\)

  • 5.Closure: \({\mathrm{\epsilon }}_{\mathit{xx}}=0\)

  • 6.Compression: \({\mathrm{\epsilon }}_{\mathit{xx}}=-\mathrm{2,0}\times {10}^{-3}\)

  • 7.Closure: \({\mathrm{\epsilon }}_{\mathit{xx}}=0\)

  • F modeling:

    • 1.Traction: \({\mathrm{\epsilon }}_{\mathit{xx}}=\mathrm{8,0}\times {10}^{-5}\)

_images/10000000000003600000021CEA7DAD1B20EB5793.jpg

Figure 1.3-1: Boundary conditions and mechanical loading on a 1 mm cube.

Six simulations are carried out:

  • Modeling A: FLUA_PORO_BETON

  • B modeling: ENDO_PORO_BETON

  • C modeling: FLUA_ENDO_PORO

  • D modeling: RGI_BETON

  • E modeling: RGI_BETON

  • F modeling: ENDO_PORO_BETON