Introduction to Mechanical Design

Recommended Prerequisites

Materials Science and Engineering I and II, Strength of Materials I and II, Applied Mechanics.

Teaching Methods

The lectures are designed for the presentation and development of the topics that correspond to the course syllabus. During practical classes the concepts taught in lectures are applied to real problems. Students should also do a small project that includes the majority of machine elements analyzed in the curriculum. This work should focus on the design and will be carried out partly in classes and mainly extra classes.

Learning Outcomes

It is intended to give for the students the a vast knowledge and integrating technical and scientific knowledge for the calculation of mechanical components in projects of medium complexity, addressing static and fatigue design. Calculation methods are presented for connection elements and mechanical transmission. At the end of the course, students will be able to: make the design of mechanical parts of medium complexity, based on analytical methods, develop a critical sense and devise strategies to optimize the design.

Work Placement(s)

No

Syllabus

Introduction: Standards and design codes. Design philosophies. Materials used in mechanical design. Welded joints: Types of joints. Static strength of welded joints. Fatigue design. Techniques for improving the fatigue resistance. Screws: Types of threads. Screw motion. Design. Screws with preload. Fatigue loadings. Bolted connections loaded in shear. Springs: Helical springs in extension and compression: stresses and strains, design for static and fatigue loads, materials. Flat springs. Shafts and shaft couplings: Shaft design static and fatigue loads. Materials. Critical speed. Keys and pines. Couplings. Rolling-contact Bearings: Types and selection of bearings: Reliability. Load capacity and life. Lubrication and wear: Contact stresses. Wear mechanisms. Types of lubrication. Classification and properties of lubricants.

Head Lecturer(s)

Diogo Mariano Simoes Neto

Assessment Methods

Assessment
valuation by synthesis work, midterm exam and exam. The work accounts for 25% of the discipline score and frequency or exam take the remaining 75%.: 100.0%

Bibliography

C.M. Branco, J.A.M. Ferreira, J.D.M. Costa e A. Ribeiro “Projecto de Orgãos de Máquinas”, Ed. Fundação C. Gulbenkian, 2005.

R. C. Juvinal, K. M. Marshek, “Fundamentals of Machine Component Design”, Ed. John Wiley & Sons, 1991.

J. R. Shigley, C. R. Mischke, “Mechanical Engineering Design”, McGraw-Hill International Edition, 1989.

R. L. Norton, “Machine Design – an Integrated Approach”, Ed. Prentice Hall Inc., 1996.

K. S. Eduards, Jr. and R. B. McKee, “Fundamentals of Mechanical Component Design”, Ed. McGraw-Hill Int., 1991.