A model database (file extension .cae) stores models and analysis jobs. (For more information on analysis jobs, see “Understanding analysis jobs,” Section 18.2.) You can have multiple model databases stored on your workstation or network, but ABAQUS/CAE can work on only one of them at any time. A model database can contain more than one model; if you plan to work on multiple models simultaneously, they must be stored in one model database. The model database in use is known as the current model database; ABAQUS/CAE displays the name of the current model database across the top of the main window, as shown in Figure 9–1.
When you first start ABAQUS/CAE, the Start Session dialog box allows you to either create a new, empty model database or to open an existing model database. Anything you create or define in ABAQUS/CAE is stored in this model database. You save the contents by selecting File
Save or FileSave As from the main menu bar.
ABAQUS/CAE never saves the model database unless you perform an explicit save operation; there is no timer-based automatic saving, for example. However, while you work on your model, ABAQUS/CAE maintains a record of all the operations that changed the model database. Although you may not have saved the model database, you can always replay the operations that replicate its current state. For more information on recreating the model database, see “Recreating an unsaved model database,” Section 9.5.3. ABAQUS/CAE is backward compatible and can open model databases created by previous versions of ABAQUS/CAE.
After you begin an ABAQUS/CAE session, you can open an existing model database by selecting FileOpen from the main menu bar, or you can create a new model database by selecting FileNew. If you open or create another model database after you have made changes to the current one, ABAQUS/CAE asks if you want to save the changes before it closes the current model database.
