#### CURVE

###### Parameters and functions
*CURVE
"Optional title"
cid, $sf_{\mathrm{x}}$, $sf_{\mathrm{y}}$, type${}_{\mathrm{x}}$, type${}_{\mathrm{y}}$
$x_1$, $y_1$
.
$x_{\mathrm{n}}$, $y_{\mathrm{n}}$
##### Parameter definition
VariableDescription
cid Curve identification number
$sf_{\mathrm{x}}$ Scale factor for abscissa values
default: 1
$sf_{\mathrm{y}}$ Scale factor for ordinate values
default: 1
type${}_{\mathrm{x}}$ Abscissa data type
options: time, length, disp, velo, acc, force, stress, strain, pressure, temp, energy, none
type${}_{\mathrm{y}}$ Ordinate data type
options: time, length, disp, velo, acc, force, stress, strain, pressure, temp, energy, none
$x_1$, $y_1$ First abscissa ordinate pair
$x_{\mathrm{n}}$, $y_{\mathrm{n}}$ Last abscissa ordinate pair
##### Description

Definition of a piecewise linear curve. Note that a curve and a function (see FUNCTION) can not have the same ID. Abscissa and ordinate data types only need to be specified if the curve is to be subjected to an automatic unit conversion (see example below).

##### Example
*CURVE
1, 1.0, 1.0
0.0, 0.0
1.0, 2.0
2.0, 8.0
###### Unit system conversion

Conversion of material parameters from MM/TON/S to SI units:

*UNIT_SYSTEM
SI
~convert_from_MMTONS
*MAT_METAL
1, 2.7e-9, 70.0e3, 0.3
1
*CURVE
1, 0, 0, strain, stress
0.0, 200.0
1.0, 280.0
~end_convert

The input above is equivalent to:

*UNIT_SYSTEM
SI
*MAT_METAL
1, 2700.0, 70.0e9, 0.3
1
*CURVE
1
0.0, 200.0e6
1.0, 280.0e6