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Specifying Magnitude and Direction for Loads
Select one of the following items to specify the magnitude and direction for force, moment, velocity, or acceleration for a load. Note that for most loads, you can type any of the values discussed below as a real number, an arithmetic expression, or a parameter name. However, for bearing loads, you can only use real numbers.
Components—Enter the components of the force or moment for each coordinate direction. Creo Simulate determines the direction and magnitude of the force or moment from the components you enter.
 If you have a 2D plane strain, 2D plane stress, or 2D axisymmetric model, you can specify only X and Y for a force load.
If you have a 2D plane strain or 2D axisymmetric model, you can specify only Z for a moment load. Specify Z only for 2D shells, not for 2D solids. For 2D plane stress models, you cannot specify moment loads.
Dir Vector & Mag—Define the direction of the force or moment by entering the values for the unit vectors of the selected coordinate system, and enter the magnitude of the force in the Mag entry box. If you enter a positive magnitude, the software applies the force or moment in the same direction as the vector. If you use a negative value, the direction opposes the vector.
Dir Points & Mag—Enter the direction of the force or moment by selecting two points and then entering the magnitude of the force in the Mag entry box. If you enter a positive magnitude, the software applies the force or moment in the same direction as the vector. If you use a negative value, the direction opposes the vector.
Note that if you select Components or Dir Vector & Mag for the angular velocity of centrifugal loads, then the instantaneous axis of revolution passes through the origin of the coordinate system you select. If you select Dir Points & Mag for the angular velocity of the centrifugal loads, then the instantaneous axis of revolution passes through the selected points.
If you are using a UCS for force or moment loads, the references to the WCS X, Y, and Z axes on the dialog box are replaced as follows:
 UCS Type Axes Cartesian X Y Z Cylindrical R Theta Z Spherical R Theta Phi