REVOLUTION Option

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Analytical rigid surface of type REVOLUTION

Select the following options on the Define tab for rigid surfaces of revolution:

Plane definition

Plane/axis:

Choose User Defined if you want to create or select the revolution axis, or choose X, Y, or Z to define it in the respective axis.

If you choose to manually define the axis, you must enter values for two points (the origin and the z axis). Abaqus does not need the x axis values because any plane that passes through the z axis will define the same revolute surface. However, HyperMesh requires the definition of the x (or radial) axis to define the plane on which the line segments are drawn.

You can also use the following buttons to automatically define the axis of revolution and x (radial) axis.

Note:

The coordinate values to define the x axis change if you pick a node (or line) from HyperMesh as the START node.

Pick System...	Click to select an existing system from the model. Once you select a system from the graphic area and click proceed, the values are populated in the table.
Create/Edit System...	Click to create a new coordinate system using the Systems panel.

Line definition

No. of segment datalines:

In this field you specify the number of datalines needed to define the line segments. The actual number of line segments is one less than this number.

Start by typing the number of line segment datalines to define the surface and click the Set button. The corresponding number of rows appears in the Line Type table below. In this table, specify the coordinates of the ends of each line segment.

The first entry in the table is always the START node. This value specifies the beginning point of the first segment. The subsequent segments’ starting point is always the end point of the previous segment, or the START node if the segment is the first in the definition.

For each line type, select a type from the Line Type column: LINE, CIRCL, or PARAB. Each selection activates the appropriate number of columns for the segment definition.

The segments can be circles, parabolas, or lines. Enter data in the columns as described below:

•	Lines are defined with the local-x (or r) and local-y (or z) coordinates of the end point in the two active columns.

•	For circles, specify the local-x (or r) and local-y (or z) coordinate of the end point in the first two columns and then, define the local-x (or r) and local-y (or z) coordinate of the center in the last two columns.

•	For parabolas, specify the local-x (or r) and local-y (or z) coordinate of the mid point in the first two columns and then, define the local-x and local-y (or z) coordinate of the end point in the last two columns.

You can also pick nodes or lines from existing geometry using the following buttons:

Pick Nodes…

Click to pick nodes from the HyperMesh model for selected line segments. When you click proceed, the coordinate values of the selected nodes relative to the defined plane will appear in selected line segment cells. In addition, temporary line segments (white color) will also be drawn in the graphic area from the picked nodes. Ensure that you select two nodes in the correct order for circles and parabolas.

Pick Lines…

Click to pick a line from the HyperMesh model. When you click proceed, the coordinate values in terms of the defined plane and line types for the selected lines will appear in the table.

Note:

The sequence of node1 and node2 for lines can be visualized from the Line Edit /Extend Line panel.

Revolution angle:

Abaqus does not need the revolution angle. The REVOLUTION type surfaces are revolved around 360 degrees in Abaqus. However, in HyperMesh, you must define a revolution angle to draw the three-dimensional surface. Select the Revolution angle check box to specify the angle of revolution and type a value in the adjacent box.

Click Update to update the HyperMesh database with your settings.