8 Libraries Section 8.1.2.2.1.1

8.1.2.2.1.1 The Dependencies Hot key in the Edit/display attributes Command

The Function of Dependencies in CADMP-II

Many material properties are dependent on ambient conditions--such as temperature, humidity, frequency, and strain rate. Use the Dependencies option to specify the dependency of specified material properties on ambient conditions. Data points consist of the external dependency parameter value and the corresponding value of the material property. Dependencies are applicable only to material properties, not to material Code Numbers, IDs, or names.

You must supply the value of the material property for each dependency parameter entered. The program will linearly interpolate the value of the material property, if required. If you specify a value for the dependent parameter greater than or less than the values of the data points entered, the program will extrapolate the material property value based upon the two closest data points. The currently displayed values are the ones used by the system during each analysis.

CADMP-II allows you to add or edit four types of dependencies: temperature, moisture, frequency, and strain rate (see Figure 6). If a dependency has been added to a material property, the first letter of the dependency (T, M, F, or S) will appear at the top of the material property's column. The particular property's value will be colored red. Using the Note hot key to write a note listing which of the materials in the spreadsheet have dependencies attached can save considerable time.

Figure 6. The Dependencies hot key

Only one dependency can be active at a time. The active dependency is indicated by the left-most letter in the Dependency row of the header (see Figure 7).

Figure 7. "T" indicates temperature dependency active

The instructions on the next page describe how to add dependencies. To edit existing dependencies, use the same procedures, omitting Step 3.

Applying and Editing Dependencies

The steps below detail how to apply dependencies to material properties that do not have them. To edit existing dependencies, follow these same steps, omitting Step 3.

Select the material property for which you want to declare a dependency parameter.
Select the Dependencies hot key. A window listing the four dependencies appears.
Select the dependency you want to apply to the material property. A window asking you to confirm the addition of the dependency appears. Answer Yes to proceed, No to cancel. Answering No returns you to the spreadsheet; answering Yes causes another data entry window to appear (see Figure 10).
Type the dependency value in the blue highlighted area of the data entry window and select the Add hot key. You can add a series of dependencies if you wish. To accept the value(s), click on Close or press Alt-C. A second dependency/value data entry window appears.
In the second dependency/value window, the dependency parameter value appears in the left field and the material property value appears in the right field. The window contains three hot keys you use to edit the fields (see Figure 8).

Figure 8. The dependency value entry window

The Add hot key is used to add data points to the set of dependency parameters. To use the Add hot key:

Click on Add or press Alt-A. An Input Value window appears. Enter a new data set, consisting of a dependency value in the left field and a material property value in the right (see Figure 9). Use the TAB key to move to move to filed at the right.

Figure 9. Dependency window hot keys

To accept the data set, click on Add or press Alt-A. You can continue adding data sets or you can exit the window and return to the data window by selecting Close. To cancel the addition of the data set, press Esc. You return to the Dependency/Value window.
If you added data points, they now appear in a list in the Dependency/Value window.

Delete

Select the data point you want to delete.
Click on the Delete hot key or press Alt-D. The data point will be deleted.

Edit

Select the material property value you want to change.
Click on the Edit hot key or press Alt-E. An Input Value window appears (see Figure 10).

Figure 10. Window for adding, editing, and deleting

The material property value is highlighted. Type a new value. Close the window to accept your changes. Press Esc to cancel. Either action returns you to the dependency window.

Close the window when you are ready to accept the values. The dependency is now active. The first letter of the dependency appears on the horizontal Depend row, under the material property vertical column heading (see Figure 11).

Figure 11. Window after the dependency is activated

The Graph hot key enables you to plot the property dependency . Dependency graphs can be plotted in the following way.

After clicking on the Graph hot key, CADMP will ask for the file name in which the file is to be stored . Give the file name.
A note will then ask you to use the graphing tool to view. Press <Esc>
'Close' the dependency window.
'Close' the 'Edit' screen. You'll go back to the Materials' library screen.
Click on Xit. You'll go back to the main menu screen.
Choose Display option
Choose 'Graph' option
CADMP will ask for the filename to be loaded
Give the file name you gave in step A to view the graph.

8.1.2.2.2 The Select attributes Command

Select the Select attributes command from the Material option menu. A window appears listing all the properties the Materials Library can display in the spreadsheet. Fields with check marks next to them are tagged and displayed in the spreadsheet (see Figure 12).

Figure 12. Select attributes command property list window

Select the property you want displayed in the spreadsheet and press Enter. A check mark appears next to it. Click on Tag or press Alt-T to tag or untag all properties at once. Select a tagged property and press Enter to untag it.

NOTE: Properties must be selected using this command before a section can be edited using the Edit command.

Close to confirm you choices. Press Esc to cancel.