VIEW DEVEL Mode

        

FEMVIEW Command only.

This command allows the user to produce a developed view of a shell model, using a cylindrical mapping about the X, Y, or Z-axis or about an axis that is indicated by the user with a single cursor hit, defining an axis normal to the screen at the position of the hit.

Mode Comments

X Develops model about the x-axis.

Y Develops model about the y-axis.

Z Develops model about the z-axis.

/CURSOR Develops model about an axis defined with the cursor.

ndc Develops model about an axis defined by normalised device coordinates.

Notes:

1.

Cutting a surface
For complete cylindrical surfaces, it is necessary to generate a cut in the surface in order to provide a developed view. The rules used for cutting a surface are as follows : If development is specified about the X, Y, or Z-axis, the surface will be broken in the 180 degree position relative to a cylindrical co-ordinate system around the chosen axis.

If development is specified using the cursor, then imagining that the user is viewing the end of a cylindrical model, positioning the cursor at the axis of this cylinder, the shell will be broken at the 12 o'clock position relative to the position of the cursor hit on the screen.

If the axis specified does not result in a cutting position that intersects the model surface then the model is developed without the surface being broken. Thus in cases where the shell is not a complete cylinder and the cursor is used to develop the model, care should be taken to make sure that no part of the model passes through the 12 o'clock position, or the model will be broken into two seperate regions at this point.

 

Figure 2.129: Undeveloped view

 

Figure 2.130: Developed view

Examples:

1.

VIEW DEVEL Z

The model is developed about the z axis : i.e. an axis at x=0, y=0. If necessary the model will be split in order to represent it as a developed view.

See also the following commands

'VIEW OPTIONS'