# CP4I

Bilinear Incompatible Quadrilateral

* Number of Nodes: 4
* Number of DoFs: 2 (Translation, Translation)
* Integration Scheme: 2nd Order Gauss
* Constant Consistent Mass Matrix With Same Order Integration

![encoding](https://4006314410-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MQ5rMqEBbzA9NgGETGX%2Fuploads%2Fgit-blob-c5aa59723c1509cdd6160863361bb7267c6938ad%2FQ4.svg?alt=media)

## Syntax

```
element CP4I (1) (2...5) (6) [7]
# (1) int, unique element tag
# (2...5) int, node i, j, k, l
# (6) int, material tag
# [7] double, element thickness, default: 1.0
```
