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Force loads in the Simulation workspace

Force is a push or a pull that causes an object to move, stop, or change direction. For example, when you swing a bat at a ball, you apply a force to the ball. The ball, which was moving towards you, changes direction and remains in motion until it is stopped by friction and gravity. A force can stop a moving body, make it move, or change its direction.

Force is a vector quantity which means it has both a magnitude and a direction. Force depends on the mass of the body and the body's acceleration upon application of force, according to Newton’s second law of motion;

Force= Mass x Acceleration

In Fusion, you define the force direction in one of the following ways:

  • normal load direction icon Normal : The load direction is normal to the faces where the load is applied. For forces applied to curved faces, the vector direction varies to remain normal at every point along each face.
  • angle load direction icon Angle (delta) : This option uses a relative X Angle, Y Angle, and Z Angle to orient the load direction. The angle is relative to the direction normal to the last selected face.
  • load direction - vectors and components icon Vectors (x,y,z) : The load direction is defined by the global force components (Fx, Fy, and Fz) that you specify.

By default, force is applied:

  • Normal to selected planar faces. However, you can specify any desired vector direction for the force.
  • For curved faces, the Direction Type setting defaults to Angle (delta).
  • For selected edges or vertices, the default Direction Type setting is Vectors (x,y,x). You must specify the X, Y, and Z force components.

Force loads applied to faces are converted to equivalent pressure loads.

You can limit a force applied to a smaller circular area within the perimeter of the face, using limit target icon Limit Target. The Direction Type must be angle load direction icon Angle or load direction - vectors and components icon Vector for the Limit Target option to be available.

By default, the specified force magnitude is distributed, on a prorated basis, among all selected faces or edges. The area of each face, or the length of each edge, determines the portion of the total load that it receives. For vertices, each vertex receives the same portion of the total load (total force magnitude / number of vertices).

If you prefer, you can use the Force Per Entity option to apply the specified magnitude to each entity. For example, if you select three faces and the magnitude is 100 N, the total applied force is 300 N (100 N * 3 faces).

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