Wear Analysis

Purpose:

The Wear Analysis module can display and modify the node coordinates in a keyword model according to the wear computed by LS-DYNA. LS-PrePost uses the information on *INITIAL_CONTACT_WEAR.

Two options of computing the wear is available, see the Compute button for more info on how to activate each method.

Sample:

No sample.

Dialog:

  • Scale factor curve ID: F(d). Scale factor as function of wear depth d. The function is defined in form of the curve ID of an existing *DEFINE_CURVE. If left out, a scale factor of 1.0 is used.

  • Max wear distance/seq: If a positive value is specified, then LSPP computes the number of REPETITIONS to reach this specified wear depth (per sequence) for the node with the largest wear from this expression: sum[0,REPETITIONS]{wear_from_initial_contact_wear*F(d)} = max_wear_distance

  • Compute:
    Option 1:
    Total wear depth, d = sum[0,NCYC]{wear_from_initial_contact_wear*F(d)}. Summation of wear displacment is performed in order of SEQ.
    Option 2:
    If a positive value is specified for "Max wear distance", then Total wear depth, d = sum[0,REPETITIONS] {wear_from_initial_contact_wear*F(d)}.

  • Smooth: Smooth/modify the total wear depth by taking average from nodes used in attached elements. Wear direction is unmodified. If the pre-smoothed wear displacement is zero, then the direction is computed as the average of attached nodes.

  • Preview: Toggle between deformed/undeformed geometry graphically.

  • Fringe:: Select component to fringe plot

  • Accept: Update the coordinates on *NODE. NCYC is set to a negative value to prevent further moving of the nodes in LS-DYNA.

  • Done: Closes the interface.