FE Configuration Examples

FE configuration examples for washers, ACM welds, series welds, parallel welds, and 0D welds.

Washers

CFG nastran 56 bolts
*filter bolt
*style bolt 0
*body 0
rigid 1 1 dofs=456

ACM Welds

ACMs with HEXA8 solid elements as welds and RBE3 elements as rigids are created. The length of the hexa is equal to the distance between the connecting shell elements.
CFG nastran 71 acm
rbe3 0 0
*body 1
hex8 1 1

Series Welds

Two series welds are created with a length equal to half the distance between the link entities.
CFG nastran 101 series
plot 0 0
*body 0
spring 6 0.5
spring 6 0.5

Series Welds

The series weld is created at the center with length equal to half the distance between the link entities.
CFG nastran 101 series
plot 0 0
*body 0
spring 6 0.5

Parallel Welds

Bar elements are created at the same location and connect the same link entities.
CFG dyna 101 parallel
plot 0 0
*body 0
bar2 1 1
bar2 1 1

0-D Welds

Supported values for the length location flag are "0", "1", or "2". The behavior for each value is as follows, "0" places the 0D element along the proposed 1D element path. If this 0D element is the only config given in the *body, then it is placed at the center of the proposed 1D element path. "1" has the same behavior as "0" except only a single 0D element is created even if multiple bodies are created (as happens in >2T welds) and "2" places the 0D element at the connector location.
CFG pamcrash2g 1 plink (ce loc)
*post prop_plink.tcl