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Section 5
5-139
where f is one of the following, as appropriate:
Young’s Modulus (E), Poisson’s Ratio, Modulus of Rigidity (G),
Weight density, Coefficient of thermal expansion, all in current
units. In lieu of numerical values, built-in material names may be
used for the above specification of constants. The built-in names
are STEEL, CONCRETE and ALUMINUM.
Example
SURFACE CONSTANTS
E 3150 1 TO 4
POISSON 0.17 ALL
DENSITY 8.68e-005 1 TO 4
ALPHA 5.5e-006 1 TO 4
Notes:
1. If G is not specified, but Poisson is specified, G is
calculated from
()
[]
Poisson1 2
E
+
.
2.
If neither G nor Poisson is specified, Poisson is assumed
based on E, and G is then calculated.
3.
If G and Poisson are both specified, the input value of G is
used, G is not calculated in this situation.
4.
If G and Poisson are both required in the analysis, such as
for the stiffness matrix of plate elements, and G is
specified, but Poisson is not, then, Poisson is calculated
from [(E/2G) –1].
5.
To obtain a report of the values of these terms used in the
analysis, specify the command PRINT MATERIAL
PROPERTIES.