EDWELD, Option, NWELD, N1, N2, SN, SS, EXPN, EXPS, EPSF, TFAIL, NSW, CID
Defines a massless spotweld or generalized weld for use in an
explicit dynamic analysis.
-
Option Label identifying the option to be performed:
ADD
—
Define a weld (default). This weld may be a spotweld between two nodes or a generalized weld. A massless spotweld will be defined if valid node numbers are specified in fields
N1andN2. A generalized weld will be defined if a node component is specified in fieldN1.DELE
—
Delete specified weld. If
NWELDis blank, all welds are deleted.LIST
—
List specified weld. If
NWELDis blank, all welds are listed.-
NWELD Reference number identifying the spotweld or generalized weld.
-
N1,N2 For a spotweld,
N1andN2are the nodes which are connected by the spotweld. For a generalized weld, input a nodal component name inN1and leaveN2blank. The nodal component should contain all nodes that are to be included in the generalized weld.-
SN Normal force at spotweld failure.
-
SS Shear force at spotweld failure.
-
EXPN Exponent for normal spotweld force.
-
EXPS Exponent for shear spotweld force.
-
EPSF Effective plastic strain at ductile failure (used only for a generalized weld).
-
TFAIL Failure time for constraint set (used only for a generalized weld); default = 1.0e20.
-
NSW Number of spot welds for the generalized weld.
-
CID Coordinate system ID number (CID) to be used for output data (used only for a generalized weld). The coordinate system must be previously defined with the EDLCS command.
Notes
This command can be used to define a massless spotweld between two nodes
or a generalized weld for a group of nodes. For a spotweld, the nodes specified
by N1 and N2 must not
be coincident. For a generalized weld, coincident nodes are permitted, but CID must
be specified when using coincident nodes. EDWELD is not
updated after a node merge operation; therefore, node merging [NUMMRG,NODE]
should be done before any EDWELD definitions. Nodes connected
by a spotweld or generalized weld cannot be constrained in any other way.
Failure of the weld occurs when:
where fn and fs are normal and shear interface forces. Normal interface force fn is nonzero for tensile values only.
You can graphically display spotwelds by issuing the command /PBC,WELD,,1.
This command is also valid in SOLUTION.
Distributed ANSYS Restriction This command is not supported in Distributed ANSYS.