12.1.1 Constant Properties

The input syntax for constant properties depends on the dimensionality of the material model.

Constant, two-dimensional and axisymmetric    (syntax)

CONDUC

k is the (isotropic) conductivity k . For orthotropic and anisotropic material, the values kxx and kyy are the conductivities k_xx and k_yy in the local element xy directions which may be user-specified. For anisotropic material, the value kxy is the conductivity k_xy .

Note that the number of specified values indicates the type of conductivity: one value is isotropic, two values is orthotropic, three values is anisotropic.

CAPACI

c is the (isotropic) capacitance c .

Constant, three-dimensional    (syntax)

CONDUC

k is the (isotropic) conductivity k . For orthotropic and anisotropic material, the values kxx, kyy and kzz are the conductivities k_xx , k_yy and k_zz in the local element xyz directions which may be user-specified. For anisotropic material, the values kxy, kyz and kzx are the conductivities k_xy , k_yz and k_zx respectively.

Note that the number of specified values indicates the type of conductivity: one value is isotropic, three values is orthotropic, six values is anisotropic.

CAPACI

c is the (isotropic) capacitance c .

    (file.dat)

'MATERI'
    1 CONDUC  0.01
    2 CONDUC  0.01 0.015
    3 CONDUC  0.01 0.015 0.008 0.007 0.012 0.009

This example input specifies isotropic conductivity for material 1 with k = 0.01 . The conductivity of material 2 is orthotropic for two-dimensional elements with k_xx = 0.01 and k_yy = 0.015 . For material 3, the conductivity is anisotropic for three-dimensional elements with k_xx = 0.01 , k_yy = 0.015 , k_zz = 0.008 , k_xy = 0.007 , k_yz = 0.012 , and k_zx = 0.009 .