Computer-Aided Design (CAD) software plays a pivotal role in designing and prototyping engineering projects, allowing students to create precise digital models of their designs. CAD tools are widely used in engineering capstone projects to develop 2D and 3D representations of components, assemblies, and systems, facilitating the creation of prototypes that can be tested and refined.

1.1 Benefits of CAD in Engineering Capstone Projects

CAD software provides several benefits in designing prototypes:

  • Precision: CAD tools enable precise measurements and dimensions, ensuring that parts fit together as expected.
  • Visualization: Engineers can view and manipulate 3D models, which helps them better understand the geometry and functionality of their designs.
  • Collaboration: CAD files can be shared among team members and advisors, allowing for easy collaboration and iterative design changes.
  • Simulation: CAD programs allow for the simulation of physical conditions such as stress, strain, and fluid flow (using FEA and CFD tools), which can identify potential design flaws early in the process.

1.2 CAD Tools

Popular CAD software tools include:

  • AutoCAD: Widely used for creating 2D and 3D designs in engineering and architecture.
  • SolidWorks: A 3D CAD program often used for mechanical design, product design, and prototyping. SolidWorks allows for detailed parts modeling, assembly simulations, and motion analysis.
  • CATIA: Primarily used in aerospace, automotive, and industrial design, CATIA offers tools for complex surface modeling and assembly design.
  • Fusion 360: A cloud-based CAD tool that integrates CAD, CAM, and CAE functions. It is especially useful for prototyping and collaboration.

1.3 Application in Prototyping

In engineering capstone projects, CAD is used to create accurate digital prototypes of the proposed designs. Once the design is finalized, the CAD model can be sent directly to a 3D printer, CNC machine, or other fabrication tools to create a physical prototype. The digital model ensures that the prototype will have accurate dimensions and will meet the required specifications.

1.4 Prototype Testing and Iteration

After creating the prototype, it undergoes rigorous testing to ensure that it meets the functional and performance requirements. Based on the test results, students may return to the CAD model to make adjustments, refine the design, and improve the prototype. This iterative process is essential in developing a viable engineering solution.