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Refinement of Preliminary Ideas

The refinement of preliminary ideas and identification of workable solutions involve exploring multiple possibilities while applying specifications and constraints. Detailed sketches assist in determining size, shape, and materials. Graphical analysis, including Descriptive Geometry, Vector Analysis, and Finite Element Analysis, helps refine designs. Drawings and modeling are essential for communicating design and manufacturing details, with rapid prototyping for physical models.

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Refinement of Preliminary Ideas

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  1. Refinement of Preliminary Ideas

  2. Identify Workable Solutions • The evaluation of different designs is done at this stage. • More than one solution is still explored. However, the specifications and constraints are applied to limit the breadth of the designs. • The designs are subjected to various types of analysis to help arrive at the final design.

  3. Develop Detailed/Annotated Sketches • A number of different possibilities should be sketched and evaluated to determine size and shape. • A determination of the size and shape will assist in determining the specific materials used for the product.

  4. Assemble Graphical Analysis of Possible Solutions • Graphical analysis is used in design refinement to see which designs optimally perform under design parameters. • Some examples of graphical analysis include: • Descriptive Geometry • Vector Analysis • Layout Analysis • Finite Element Analysis • 3D Modeling Sample of Finite Element Analysis (FEA)

  5. Descriptive Geometry Descriptive geometry using orthographic projection to solve a 3D problem on a 2D surface.

  6. Vector Analysis • Vector: a quantity having both magnitude and direction. • A vector can be represented by an arrow drawn to a particular scale. • The direction of the arrow shows the direction of the vector. • Usually involves two or more forces at work. • When two or more forces are at work, you will get an additional force called a resultant. F1 Resultant F2

  7. Drawings & Modeling • After a design has been accepted, a technical drawing and/or model is made as the primary method to communicate the design and manufacturing information.

  8. Modeling • Another method to evaluate a design is to make an actual model of the design by one of the many rapid prototyping processes. • A rapid prototype allows the engineer to see and actually handle the design in a matter of hours. Some of the prototypes are sturdy enough for limited production runs. A model made by Stereolithography (SLA)

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