*NFILL
14.2 *NFILL: Fill in nodes in a region.
This option is used to generatenodes for a region of a mesh by filling in nodes between two bounds.
Products: ABAQUS/Standard ABAQUS/Explicit
Type: Model data
Level: Part, Part instance
Reference:
•“Node definition,” Section 2.1.1 ofthe ABA QUS AnalysisU ser’sManual
Optional parameters:
BIAS
Include this parameter to bias the spacing of the nodes being generated tow ard one end of the line
of nodes being generated. Set this parameter equal to the ratio of adjacent distancesbetween nodes
along each line of nodes generated,as the nodes go from the first bounding node set to the second.
If the BIAS parameter is less than one, the nodes are concentrated towardthe first bounding node
set; if it is greater than one, the nodesare concentrated toward the second bounding set. Thevalue
of the parameter must be positive.
The BIAS and SINGULAR parameters are mutuall y exclusive.
NSET
Set this parameter equal to the name of the node set to which the nodes createdby this operation
(including the bounding nodes) will be assigned. Node sets generated by this option a re always
sorted node sets.
SINGULAR
This parameter applies only to ABAQUS/Standard analys es.
Include this parameter for fracture mechanics calculations with second-order isoparametric
elements to create a “quarter point” crack-tip element and bias the remaining elements. Set
SINGULAR=1 or 2, depending on whether the first or the second boundi ng node set represents
the crack tip.
The BIAS and SINGULAR parameters are mutuall y exclusive.
TWO STEP
This parameter is meaningful only if the BIAS parameter is us ed. When this parameter is included,
the BIAS value is applied only at each second interval alongthe line; therefore, the midside nodes
of second-order elements will be at the middle ofthe two adjacent intervals.
14.2–1
ABAQUS Version 6.1 Module: ID:
Printed on: