5. Keyword EXTRACTION

The material characteristic values contained in the Materials Catalog are generally tables of values that depend on temperature. As a result, only certain factor keywords from command DEFI_MATERIAU were entered in the Materials Catalogue: those for which operands are defined by functions (for example: ELAS_FO, THER_NL,…). On the other hand, the factor keywords for which the operands are defined by real numbers (for example: ELAS,…) are not specified in the various files that make up the « files » form of the Materials Catalog.

However, these keywords can be generated in the command DEFI_MATERIAU using the keyword EXTRACTION by specifying the behavior or behaviors that one wishes to generate and by specifying the temperature value at which one wishes to extract the values of the function.

5.1. Operand COMPOR

♦ COMPOR = l_compor [:ref:`l_K16 <l_K16>`]

Refers to the names of the DEFI_MATERIAU factor keywords that will be extracted. For example, “ELAS” or “THER”.

5.2. Operand TEMP_EVAL

♦ TEMP_EVAL = temp [R]

Temperature at which it is desired to extract the values of the material characteristics. For example, in the command DEFI_MATERIAUl, we create “operandE= E0under the keyword factor ELAS by interpolating the value to T0 of the operand E= E (T) defined in the catalog. The type of interpolation is determined by the corresponding function in the catalog. In general, interpolation is linear, extrapolations are not recommended (or even forbidden).