Measuring an Area
Use the AREA function to calculate the area and area properties of a picked face. The face must be completely bounded by elements. Creo Elements/Direct 2D Access measures the area of both single faces and multiple faces.
For a single face, Creo Elements/Direct 2D Access calculates and displays the following area properties:
• number of holes in the face area
• density of the face
• perimeter length of the face (outer perimeter)
• area
• center of area (= center of mass)
• principal axes (of inertia through the center of area)
• second moments of area about principal axes
• second moments of area about coordinate system axes
• product of second moment of area about coordinate system axes
• moments of inertia about principal axes
• moments of inertia about coordinate system axes
• product of moment of inertia about coordinate system axes
• section moduli (about principal axes)
• distance from first neutral axis to extreme fiber
• distance from second neutral axis to extreme fiber
• radii of gyration with respect to the center of area
• angle between coordinate system and principal axes
If you identify multiple faces, Creo Elements/Direct 2D Access uses the density values to calculate the common center of mass. The density must be specified before a face is identified, otherwise the default value (1) or the previous density value is used.
For multiple faces, Creo Elements/Direct 2D Access calculates and displays the following total values:
• total area
• center of area (common)
• center of mass (common)
• principal axes through the (common) center of area
• second moments of area about (common) principal axes
• second moments of area about coordinate system axes
• product of second moment of area about coordinate system axes
• moments of inertia about (common) principal axes
• moments of inertia about coordinate system axes
• product of moment of inertia about coordinate system axes
• radii of gyration with respect to the (common)center of area
• angle between coordinate system and (common) principal axes
To measure the area properties:
1. Pick AREA in MEASURE.
Creo Elements/Direct 2D Access prompts you to enter a density (the default is1) or identify a face(s).
2. Enter the density value if known. If not, go to the next step.
3. Pick a face(s).
Creo Elements/Direct 2D Access prompts for an output option SCREEN, DEL_OLD, APPEND, or filename.
4. Enter SCREEN to display the information.
The screen clears and Creo Elements/Direct 2D Access displays the area properties information.
The density value is reset to 1 after using an output option.
5. Pick [Reset] or enter [Ctrl] [D] to return to the Creo Elements/Direct 2D Access screen.
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Creo Elements/Direct 2D Access marks the Center of Mass on the faces you identify. If you identify multiple faces when using Area, then Creo Elements/Direct 2D Access also marks the Common Center of Area (+) and the Common Center of Mass (o). To remove these marks, pick REDRAW
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