Viscoelastic object

materialApi.materials()[name].Viscoelastic

odb_Viscoelastic&
Viscoelastic(const odb_String& domain,
           const odb_SequenceSequenceDouble& table,
           const odb_String& frequency,
           const odb_String& type,
           const odb_String& preload,
           const odb_String& time,
           double errtol,
           int nmax,
           const odb_SequenceSequenceDouble& volumetricTable);

Table data

If frequency=FORMULA, the table data for table specify the following:

• Real part of $g_1^{*}$ $\left(g^{*}\left(\omega \right)=g_1^{*}{f}^{-a}\right)$.

• Imaginary part of $g_1^{*}$.

• Value of $a$.

• Real part of $k_1^{*}$ $\left(k^{*}\left(\omega \right)=k_1^{*}{f}^{-b}\right)$. If the material is incompressible, this value is ignored.

• Imaginary part of $k_1^{*}$. If the material is incompressible, this value is ignored.

• Value of $b$. If the material is incompressible, this value is ignored.

If frequency=TABULAR and type=ISOTROPIC and preload=NONE, or time=FREQUENCY_DATA the table data for table specify the following:

• Real part of $\omega g^{*}$ $\left(\omega \mathrm{\Re }\left(g^{*}\right)=G_{\mathrm{\ell }}/G_{\mathrm{\infty }}\right)$.

• Imaginary part of $\omega g^{*}$ $(\omega \mathrm{\Im }(g*)=1-G_s/G_{\mathrm{\infty }})$.

• Real part of $\omega k^{*}$ $\left(\omega \mathrm{\Re }\left(k^{*}\right)={\mathrm{K}}_{\mathrm{\ell }}/{\mathrm{K}}_{\mathrm{\infty }}\right)$. If the material is incompressible, this value is ignored.

• Imaginary part of $\omega k^{*}$ $\left(\omega \mathrm{\Im }\left(k^{*}\right)=1-{\mathrm{K}}_s/{\mathrm{K}}_{\mathrm{\infty }}\right)$. If the material is incompressible, this value is ignored.

• Frequency $f$ in cycles per time.

If frequency=TABULAR and type=ISOTROPIC and preload=UNIAXIAL the table data for table specify the following:

• Loss modulus.

• Storage modulus.

• Frequency.

• Uniaxial strain.

If frequency=TABULAR and type=TRACTION and preload=NONE the table data for table specify the following:

• Normalized loss modulus.

• Normalized shear modulus.

• Frequency.

If frequency=TABULAR and type=TRACTION and preload=UNIAXIAL or preload=UNIAXIAL_VOLUMETRIC the table data for table specify the following:

• Loss modulus.

• Storage modulus.

• Frequency.

• Closure.

If time=PRONY or frequency=PRONY, the table data for table specify the following:

• ${\overline{g}}_1^P$, the modulus ratio in the first term in the Prony series expansion of the shear relaxation modulus.

• ${\overline{k}}_1^P$, the modulus ratio in the first term in the Prony series expansion of the bulk relaxation modulus.

• ${\tau }_1$, the relaxation time for the first term in the Prony series expansion.

If frequency=TABULAR and type=ISOTROPIC and preload=VOLUMETRIC or preload=UNIAXIAL_VOLUMETRIC the table data for volumetricTable specify the following:

• Loss modulus.

• Storage modulus.

• Frequency.

• Volume ratio.