MACHINE DESIGN I

ME365 COURSE OUTLINE Fall 2009

Instructor: Dr. Judah Ari-Gur, Room F-246, Tel. 276-3419, Fax: 276-3421,

E-mail: judah.ari-gur@wmich.edu

Office Hours: Mon. 5 p.m., Wed. 11 a.m., or by appointment

BIBLIOGRAPHY

Textbook: Juvinall, R.C. and Marshek, K.M., "Fundamentals of Machine Component Design", 4th Edition, Wiley, 2006.

Others: Norton, R.L., "Machine Design – An Integrated Approach", 3rd Edition, Prentice-Hall, 2006.

Ugural, A.C., “Mechanical Design – An Integrated Approach”, McGraw-Hill, 2004.

Prerequisites: IME142, ME220 or AE261, ME250 or AE250, ME257, ME258

OBJECTIVES

In previous studies the student learned to find exact solutions to model problems defined within the various areas of mechanical engineering. The primary objective of the design course is to convert the simple-model-minded student into a design-minded engineer, where optimal solutions to real engineering problems replace the single "correct" answers. The secondary objective is to interrelate and combine concepts and methods from the different areas of science and engineering as deemed necessary in the design and analysis of machines.

DESCRIPTION

The class will meet in lectures and in laboratory sessions. Laboratories are for CAE tutorials, reviews and individual supervision during the work on projects and assignments. Weekly homework assignments, which cover the lecture topics and prepare for the exams, will be assigned.

In addition to the weekly assignments there will be two design projects and one computer assignment. The handout for each project will include a description of the need together with the relevant constraints. On the due date the students will submit bound reports, typewritten through a wordprocessor. Oral presentations will follow as scheduled during the laboratory sessions. The use of clear graphics is essential for engineering communication. High quality visual aids are required for effective oral presentation.

The course will emphasize the use of the computer as a powerful and productive tool. The students are expected to be able to write their own programs, and use commercially available software for analysis and graphics.

The course includes two stages. First, fundamental concepts of design and its analysis are presented. Later, typical illustrative applications of common mechanical components are described and design considerations and procedures are studied. The lecture topics in both stages relate to design and analysis of present and future projects.

TOPICS

Introduction - the design process.

Deformation analysis. Energy methods.

Failure analysis (yield, crack propagation, fatigue, buckling).

Bearings. Hydrodynamic lubrication.

Gears (kinematics, power transmission, strength).

Shafts (combined loading, fatigue).

Gear trains and gear-shaft systems.

Clutches and brakes.

Joints. Threads and screws.

GRADING (and 2009 due dates):

Homework - 10%

Computer program - 10% (10:30 a.m., Mon., 23 Nov.)

First project - 15% (Fri., 30 Oct.)

Midterm exam - 20% (Mon., 19 Oct.)

Second project - 20% (Fri., 11 Dec.)

Final exam - 25% (Thur., 17 Dec., 10:15-12:15)

The grade for each project : 75% written report and design quality

25% oral presentation

Failure to submit any of the above means failure in the course ("E"), regardless of the cumulative average.

A=90%- ; BA=85%- ; B=80%- ; CB=75%- ; C=70%- ; DC=65%- ; D=60%-

Note: Your grades are based on performance and achievement, not effort or time. However, lack of effort usually reflects on level of accomplishment.