Department of Mechanical Engineering

MCE 367 Machine Design I

Spring, 2008

Catalog MCE 367 Machine Design (4-0-4). Prerequisite: ESC 211. Design of machine

Description: elements under static and fatigue loading; design and application of gearing;

force analysis of spur, helical, bevel and worm gears; design of gears for static

and fatigue loading; use of keys, pins, and splines to attach gears to shafts.

Text: Shigley's Mechanical Engineering Design, 8^th /Ed., Richard G. Budynas &

J. Keith Nisbett, McGraw Hill, 2008.

Instructor: Dr. William Atherton, Associate Professor of Mech. Eng.
Office: SH-233 Phone: (216) 687-2595 FAX: (216) 687-5375 Email: w.atherton@csuohio.edu

Office Hours: 11:00 – 12:00 M & W; 2:00 – 3:00 T & Th

Course To provide students a systematic approach for design and analysis of

Objectives: machine components within the framework of realistic constraints such as

cost, size, weight, materials, and safety.

Course To convey to students an understanding of:

Outcomes: 1) Failure theories under static loading

2) Failure of machine members under fatigue loading

3) Design of threaded fasteners

4) Design of mechanical springs

5) AGMA formulations for gear design

6) Design of spur, bevel, & worm gears

7) Design of brakes & clutches

8) Design of belt and chain drives for power transmission

Grading: The course grade will be determined by performance on quizzes, two

midterms, a design project, and a comprehensive final examination according

to the following formula:

Quizzes => 10%

Midterm #1 => 20%

Midterm #2 => 20%

Design Project => 20%

Final Exam => 30%

The final grade for the course will be based on the following scale:

Homework will be suggested but will not be collected or graded.

The quizzes, midterms, and final examination are open book/open notes. Quizzes cannot be made-up for any reason. Instead, one quiz grade (the lowest grade) will be dropped at the end of the semester. Do not miss more than one quiz!

Either of the midterms or the final examination can be made-up only if a valid reason is communicated to the instructor before the time of the test. Valid reasons for missing a test include: death of an immediate family member, automobile accident, etc. In any case, written verification of the reason must be provided. Otherwise, the course grade will be severely impacted by the assignment of zero points for the test.

Course Outline

Date Description Reading

Jan 14 Introduction, review of stress states, Mohr’s circle

Jan 16 Static failure theories 5-1 thru 5-7

Jan 17 Examples, more static failure theories, Quiz #1 5-8 thru 5-9

Jan 21 Martin Luther King’s Day Holiday – No class

Jan 23 Failure theories for brittle mat’ls, fracture mechanics 5-10 thru 5-12

Jan 25 Fracture mechanics, Intro to fatigue failure, Quiz #2 6-1 thru 6-2

Jan 28 Failure criteria, modifying factors 6-3 thru 6-7

Jan 30 Modifying factors, varying loads 6-8 thru 6-12

Feb 1 Torsional fatigue, Quiz #3 6-13 thru 6-14

Feb 4 Cumulative fatigue 6-15 thru 6-16

Feb 6 More fatigue 6-18

Feb 8 Examples, review

Feb 11 Midterm Examination #1

Feb 13 Threaded fasteners 8-1 thru 8-3

Feb 15 Fastener stiffness/member stiffness 8-4 thru 8-5

Feb 18 President’s Day – No class

Feb 20 Strength, tension, & torque 8-6 thru 8-8

Feb 22 Preload, gaskets, fatigue, member shear, Quiz #4 8-9 thru 12

Feb 25 Examples, review

Feb 27 Springs – stress, stiffness, stability 10-1 thru 10-5

Feb 29 Spring design, resonance, fatigue, Quiz #5 10-6 thru 10-10

Mar 3 Special springs – extension, torsion, cone 10-11 thru 10-15

Mar 5 Gear fundamentals 13-1 thru 13-7

Mar 7 Gear forming, types of gears, Quiz #6 13-8 thru 13-13

Mar 10 – 14 Spring Break! – No classes

Mar 17 Force analysis 13-14 thru 13-16

Mar 19 Force analysis 13-17

Mar 21 Examples, review

Mar 24 AGMA stress equations 14-1 thru 14-3

Mar 26 AGMA strength equations 14-4 thru 14-5

Mar 28 Modifying factors, Quiz #8 14-6 thru 14-10

Mar 31 Modifying factors 14-11 thru 14-17

Apr 2 Design & analysis 14-18 thru 14-19

Apr 4 Examples

Apr 7 Review

Apr 9 Midterm Examination #2

Apr 11 Shaft design, stress considerations 7-1 thru 7-4

Apr 14 Shaft deflection, critical speed 7-5 thru 7-8

Apr 16 Shaft misc

Apr 18 Review

Apr 21 Internal/external brakes & clutches 16-1 thru 16-3

Apr 23 Band, friction, & cone type brakes & clutches 16-4 thru 16-5

Apr 25 Belts 17-1 thru 17-3

Apr 28 Timing belts & Chains 17-4 thru 17-5

Apr 30 Other drives 17-6 thru 17-7

May 2 Review

May 7 Comprehensive Final Examination 8:30 – 10:30 am