E N G I N E E R I N G A N D D E S I G N P O RT F O L I O

KAROLY FODOR

fodork6@gmail.com(774) 219 5852

ORNITHOPTER

Personal Project

Duration: 3 weeks

Objective: To design and build a mechanism that accurately mimics the way in which a bird flaps its wings and functions as a proof of concept for future designs.

Software and Machines used: SolidWorks, Mdesign, Repetier, Printrbot Simple MetalKaroly Fodor

fodork6@gmail.com(774) 219 5852

ORNITHOPTER (CONT.)

Materials:PLA plasticCotton- polyester fabric

Outcome: The ornithopter flapped its wings successfully with the use of a 1.5V D/C hobby motor. A new design is now in progress that will utilize the same type of mechanism with the goal of achieving flight. A video of how it functions can be seen at https://vimeo.com/119759169.

Key Skills:CAD in SolidWorks, gear simulation using Mdesign, 3D printing, and using proper tolerances.

Karoly Fodorfodork6@gmail.com(774) 219 5852

CHESS SET

Personal Project

Duration: 2 weeks

Objective: To design and build an aesthetically pleasing chess set with a board that breaks down into several small pieces for compact storage.

Software and Machines used: SolidWorks, Repetier, Printrbot Simple Metal

Karoly Fodorfodork6@gmail.com(774) 219 5852

CHESS SET (CONT.)

Materials:PLA plastic

Outcome: The chess figures and board pieces were printed successfully. The board pieces fit together snugly and are easy to assemble.

Key Skills:CAD in SolidWorks, 3D printing, and designing pieces for limited production with proper tolerances.

Karoly Fodorfodork6@gmail.com(774) 219 5852

CFD SIMULATION OF A ROTATING BALL

Fluid Mechanics Group Project

Duration: 2 weeks

Objective: To examine the role the Magnus effect plays on the lift coefficient of a rotating sphere experiencing low oncoming air velocity.

Software used: COMSOL

Karoly Fodorfodork6@gmail.com(774) 219 5852

Streamline diagram and pressure contours of a ball with a TSR (tip speed ratio) of 5

CFD SIMULATION OF A ROTATING BALL (CONT.)

My role in the group:My main focus was creating and running simulations in COMSOL, although I was also heavily involved in making theoretical calculations and writing the final report.

Outcome: A direct correlation was found between the angular velocity of the ball and the lift force it experienced. Backspin was modeled with TSR values ranging from zero to five, and the lift coefficient increased as the TSR value increased in the simulation. Surface roughness was found to have no effects on the lift coefficient at low upstream velocities.

Key Skills (For my role in the group):Knowledge of theoretical fluid mechanics and CFD simulation in COMSOL

Karoly Fodorfodork6@gmail.com(774) 219 5852

TRACTOR GEAR REDUCER

Karoly Fodorfodork6@gmail.com(774) 219 5852

Design of Machine Elements Group Project

Duration: 3 weeks

Objective: To design a gear reducer for a tractor transmitting 22HP with an input speed of 1800 RPM and an output range between 330 and 335 RPM in such a way that it fits in a 22”x22”x25” space with the input and output shafts being in line while adhering to AGMA constraints. Industry standard rings, bearings and keys had to be accommodated into the design.

Software used: MDesign, Autodesk Inventor

TRACTOR GEAR REDUCER (CONT.)

Karoly Fodorfodork6@gmail.com(774) 219 5852

My role in the group:I primarily worked on shaft design, although my work bled into key design and bearing selection as well. Because of our excellent group compatibility, many of the design steps were completed by the unit rather than by individual group members.

Outcome: The gear box was designed successfully with all the requirements being fulfilled. The output speed of this design is 332.48 RPM, while stresses and deflections were at acceptable levels. A detailed report on the design process and a complete list of specifications is available upon request.

Key Skills (For my role in the group):Knowledge of machine elements design, US standards, and use of MDesign.