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dependency_item index data_item element_group unknown n

This record allows you to make an element data item dependent on one of the unknowns (see dof_label for unknown names). This is done for n values of the unknown (n should be at least 2). The dependency should be specified in the dependency_diagram record (same index) with a multi linear diagram. In the diagram first a set of unknowns values should be specified. Second the set of data item values for those unknown values should be specified.

Some examples are given below.

Temperature dependent Young's modulus of element_group 1 ($E=1.e10$ at temperature $1$, etc.):


dependency_item 1 -group_materi_elasti_young 1 -temp 4
dependency_diagram 1 1. 2. 3. 4. 1.e10 1.e9 1.e8 3.e5

Temperature dependent Young's moduli in two maxwell chains of element_group 1 ( for the first chain the moduli $1.e10, 1.e9, \ldots$ for the second chain the moduli $1.e10, 1.e9, \ldots$ all relaxation times are $1. \; 10 ^ {-2}$. ):


dependency_item 1 -group_materi_maxwell_chain 1 -temp 4
dependency_diagram 1
1. 2. 3. 4.
1.e10 1.e9 1.e8 3.e5
1.e-2 1.e-2 1.e-2 1.e-2
1.e12 1.e11 1.e10 3.e7
1.e-2 1.e-2 1.e-2 1.e-2

As a special option, unknown can be set to -time_current. This allows for time-dependent properties (aging). The example below shows time dependent Young's modulus of element_group 1 ($E=1.e10$ at time $0$, etc.):


dependency_item 1 -group_materi_elasti_young 1 -time_current 4
dependency_diagram 1 0. 1. 2. 3. 1.e10 1.e9 1.e8 3.e5

The dependencies are available only for real data (and thus not for integer data). The dependency_diagram values shows be specified from low to high values for the unknown.


next up previous contents
Next: dof_label unknown_0 unknown_1 ... Up: Input file, data part Previous: dependency_diagram index unknown_value_0 ...   Contents
tochnog 2001-09-02