# Connectors CNRB Interpolation — Welcome to LS-DYNA Examples

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This example shows the usage of *CONSTRAINED_INTERPOLATION. Linear Examples 3 from A Roadmap to Linear an Nonlinear Implicit Analysis in LS-DYNA by George Laird and Satish Pathy.

## Keywords

```*BOUNDARY_SPC_NODE
*CONSTRAINED_INTERPOLATION
*CONSTRAINED_NODAL_RIGID_BODY
*CONTROL_IMPLICIT_GENERAL
*CONTROL_IMPLICIT_SOLUTION
*CONTROL_RIGID
*CONTROL_SHELL
*CONTROL_TERMINATION
*DATABASE_BINARY_D3PLOT
*DATABASE_EXTENT_BINARY
*DATABASE_SPCFORC
*DEFINE_CURVE_TITLE
*ELEMENT_SHELL
*END
*KEYWORD
*MAT_ELASTIC_TITLE
*NODE
*PART
*SECTION_SHELL_TITLE
*SET_NODE_LIST
*TITLE```

## Reduced Input

```*TITLE
Roadmap Linear and Nonlinear Analysis - Connectors - CNRB-Interpolation
*CONTROL_IMPLICIT_GENERAL
1       1.0
*CONTROL_IMPLICIT_SOLUTION
1

*CONTROL_RIGID
1

*CONTROL_SHELL
2
1

*CONTROL_TERMINATION
1.0
*DATABASE_SPCFORC
1.0         3
*DATABASE_BINARY_D3PLOT
1.0

*DATABASE_EXTENT_BINARY
-3

*PART
1         1         1
*SECTION_SHELL_TITLE
Shell - RBE2
1        21    0.8333         3
0.01
*MAT_ELASTIC_TITLE
Linear, Elastic Material
1               1.0E7       0.3
*PART
2         2         1
*SECTION_SHELL_TITLE
Shell - RBE3
2        21    0.8333         3
0.01
*DEFINE_CURVE_TITLE
1
0.0                 0.0
1.0                 1.0
*BOUNDARY_SPC_NODE
*ELEMENT_SHELL
*NODE
1         3         1 -0.093539         0         0         0         0
2         3         1 -0.093539         0         0         0         0
*CONSTRAINED_INTERPOLATION
101         2         3         0         0
41       123       1.0       1.0       1.0       0.0       0.0       0.0
42       123       1.0       1.0       1.0       0.0       0.0       0.0
43       123       1.0       1.0       1.0       0.0       0.0       0.0
44       123       1.0       1.0       1.0       0.0       0.0       0.0
45       123       1.0       1.0       1.0       0.0       0.0       0.0
46       123       1.0       1.0       1.0       0.0       0.0       0.0
47       123       1.0       1.0       1.0       0.0       0.0       0.0
48       123       1.0       1.0       1.0       0.0       0.0       0.0
49       123       1.0       1.0       1.0       0.0       0.0       0.0
50       123       1.0       1.0       1.0       0.0       0.0       0.0
51       123       1.0       1.0       1.0       0.0       0.0       0.0
52       123       1.0       1.0       1.0       0.0       0.0       0.0
53       123       1.0       1.0       1.0       0.0       0.0       0.0
54       123       1.0       1.0       1.0       0.0       0.0       0.0
55       123       1.0       1.0       1.0       0.0       0.0       0.0
56       123       1.0       1.0       1.0       0.0       0.0       0.0
57       123       1.0       1.0       1.0       0.0       0.0       0.0
58       123       1.0       1.0       1.0       0.0       0.0       0.0
59       123       1.0       1.0       1.0       0.0       0.0       0.0
96       123       1.0       1.0       1.0       0.0       0.0       0.0
97       123       1.0       1.0       1.0       0.0       0.0       0.0
98       123       1.0       1.0       1.0       0.0       0.0       0.0
99       123       1.0       1.0       1.0       0.0       0.0       0.0
500       123       1.0       1.0       1.0       0.0       0.0       0.0
501       123       1.0       1.0       1.0       0.0       0.0       0.0
502       123       1.0       1.0       1.0       0.0       0.0       0.0
503       123       1.0       1.0       1.0       0.0       0.0       0.0
504       123       1.0       1.0       1.0       0.0       0.0       0.0
505       123       1.0       1.0       1.0       0.0       0.0       0.0
506       123       1.0       1.0       1.0       0.0       0.0       0.0
507       123       1.0       1.0       1.0       0.0       0.0       0.0
508       123       1.0       1.0       1.0       0.0       0.0       0.0
509       123       1.0       1.0       1.0       0.0       0.0       0.0
510       123       1.0       1.0       1.0       0.0       0.0       0.0
511       123       1.0       1.0       1.0       0.0       0.0       0.0
512       123       1.0       1.0       1.0       0.0       0.0       0.0
*CONSTRAINED_NODAL_RIGID_BODY
100         0         1         0         0         0         0
*SET_NODE_LIST
1       0.0       0.0       0.0       0.0
1       138       139       140       141       142       143       144
145       146       147       148       149       150       151       152
153       154       155       156       193       194       195       196
197       198       199       200       201       202       203       204
205       206       207       208       209         0         0         0
*END
```