# PBEAMA

Geometric Properties ElementPBEAMA lets you specify the geometric properties for an associated beam element of an arbitrary cross-section

## Format

```
<PBEAMA
id = "integer"
mid = "integer"
area = "real"
ixx = "real"
iyy = "real"
izz = "real"
iyz = "real"
nx = "integer"
ny = "integer"
nz = "integer"
ngx = "integer"
ngy = "integer"
ngz = "integer"
graph = "integer"
/>
```

## Attributes

`id`- Unique beam property identification number.
`mid`- Material property identification number.
`area`- Cross sectional area of the beam element.
`ixx`,`iyy`,`izz`- Moment of area of the beam element about the axis passing through r
_{x}, r_{y}and r_{z}respectively. `iyz`- Product of area of the element about the axes passing through r
_{y}and r_{z}. `nx`,`ny`,`nz`-
Number of integration points in X, Y and Z directions.

Default for

`nx`is 5,`ny`is 3 and`nz`is 3. `ngx`,`ngy`,`ngz`- Number of sub elements in X, Y and Z directions. The default for all three is 1. 4
`graph`- A post-processing flag that determines how this element is represented in the animation H3D. Default is 1.

## Example

The example demonstrates the definition of a PBEAMA property element.

`<PBEAMA id="1" mid="1" area="50." ixx="50." iyy="50." izz="50." nf="1" nx="5" ny="3" nz="3" />`

## Comments

- This type of property card is used to specify the geometric properties of the BEAM element. Each beam property element must have a unique identification number.
- This property card defines the geometrical properties of the beam.
The material properties of the beam are defined by the material
specified by
`mid`. - graph is a post processing flag that determines how this element will
be represented in the animation H3D file.
`graph`= "0" implies that this element will not be represented in the H3D`graph`= "1" implies that this element will be represented as a line drawn between the two connecting nodes.

Note: When using`graph`="0" or`graph`="1", you will not be able to visualize the stress, strain or displacement contours. To do this, use`graph`="2" or`graph`="3".`graph`= "2" implies that the beam will be represented by 3D solid elements. This mode is useful when trying to visualize the stress/strain and displacement contours.

`graph`= "3" implies that the beam is represented both as 3D solid elements as well as a line connecting the two nodes of the beam. This is useful when you need to visualize both the center line and the 3D representation of the beam.

- When representing the beam as a solid, the
arguments
`ngx`,`ngy`and`ngz`determine the number of elements that are used to represent the beam in the animation H3D.

ngx = ngy = ngz = 1

ngx = ngy = ngz = 2

ngx = ngy = ngz = 3

While increasing the ngx, ngy and ngz results in a better representation of the beam, it also increases the post-processing time taken by MotionSolve to write out the H3D. In addition, large values of

`ngx`,`ngy`or`ngz`will increase the file size of the H3D considerably. Consider using the minimum values of these attributes that satisfy your visualization needs.