ABAQUS Volume II: I–Z - Manual (Page 191)

*NFILL
14.2 *NFILL: Fill in nodes in a region.
This option is used to generate nodes 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 of the ABAQUS Analysis User’s Manual
Optional parameters:
BIAS
Include this parameter to bias the spacing of the nodes being generated toward one end of the line
of nodes being generated. Set this parameter equal to the ratio of adjacent distances between 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 toward the first bounding node
set; if it is greater than one, the nodes are concentrated toward the second bounding set. The value
of the parameter must be positive.
The BIAS and SINGULAR parameters are mutually exclusive.
NSET
Set this parameter equal to the name of the node set to which the nodes created by this operation
(including the bounding nodes) will be assigned. Node sets generated by this option are always
sorted node sets.
SINGULAR
This parameter applies only to ABAQUS/Standard analyses.
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 bounding node set represents
the crack tip.
The BIAS and SINGULAR parameters are mutually exclusive.
TWO STEP
This parameter is meaningful only if the BIAS parameter is used. When this parameter is included,
the BIAS value is applied only at each second interval along the line; therefore, the midside nodes
of second-order elements will be at the middle of the two adjacent intervals.
14.2–1
ABAQUS Version 6.1 Module: ID:
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