Question

CATIA or INVENTOR Steps for geometrical modeling and analysis of simple components.

Answer 1

Geometric Modeling

The computer compatible mathematical description of the geometry of the object is called as geometric modeling.

Steps for Creating the Geometric Model

There are three steps in which the designer can create geometric models by using CAD software, these are:

1) Creation of basic geometric objects: In the first step the designer creates basic geometric elements by using commands like points, lines, and circles.

2) Transformations of the elements: In the second step the designer uses commands like achieve scaling, rotation and other related transformations of the geometric elements.

3) Creation of the geometric model: During the final step the designer uses various commands to that cause integration of the objects or elements of the geometric model to form the desired shape. During the process of geometric modeling the computer converts various commands given from within the CAD software into mathematical models, stores them as the files and finally displays them as the image. The geometric models created by the designer can open at any time for reviewing, editing or analysis.

Representation of the Geometric Models

There are three types of wire frame geometric modeling, these are: 2D, 2.1/2D and 3D. They have been described below:

1) 2D: It stands of two dimensional view and is useful for flat objects.

2) 2.1/2D: It gives views beyond the 2D view and permits viewing of 3D object that has no sidewall details.

3) 3D: The three dimension representation allows complete three-dimensional viewing of the model with highly complex geometry. Solid modeling is the most advanced method of geometric modeling in three dimensions

Computer aided engineering analysis

Computer aided engineering analysis comprises of three steps.

1. Pre-processing:

2.Solving

3.Post processing

Preprocessing: In this phase, engineers model the geometry (or a system representation) and the physical properties of the design, as well as the environment in the form of applied loads or constraints.

Solving:the model is solved using an appropriate mathematical formulation of the underlying physics.

Post-processing: In the post-processing phase, the results are presented to the engineer for review.