Keywords: ccx

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### Maximum distance MPC.

This MPC is used to specify that the (Euclidean) distance between two nodes a and b must not exceed a given distance d. A fictitious node c must be defined using the *NODEnode card. The distance d should be assigned to the first coordinate of c, the other coordinates are arbitrary. The first DOF of c should be assigned a value of zero by means of a *BOUNDARYboundary card. Since all DOFs of nodes a and b are used in the MPC, these nodes must be listed three times. Notice that due to this MPC discontinuities can arise.

    Example:

    *NODE
    262,7.200000,0.,0.
    *MPC
    DIST,129,129,129,10,10,10,262
    ..
    *STEP
    *STATIC
    *BOUNDARY
    262,1,1,0.
    ..
    *END STEP

specifies a maximum distance MPC. The distance between nodes 129 and 10 is not allowed to exceed 7.2 units.

Example file: dist.