When preparing a part for modeling and analysis, you create Mechanica modeling entities such as materials, constraints, loads, and measures. Before you can create certain types of modeling entities, you need to add specific features to your part. You may also need to add datum geometry to your part for the following reasons:

to create an origin for certain constraints and loads

to simulate conditions applied to surface regions

You may need to take special steps to prepare your model for 2D analysis, such as adding a Cartesian coordinate system, or to prepare a symmetric model, such as defining cuts along the axes of symmetry.

As a step in your part planning process, decide which types of modeling entities you want to add to your model. After you have your plan in mind, determine the requirements for each of the entities you will define. Here are some of the techniques and prerequisites you may want to consider:

determining your model's system of units

adding coordinate systems

adding datum features

defining surface and volume regions

defining Pro/ENGINEER parameters

using symmetry

preparing a 2D model

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