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, 8th /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, MohrÕs 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 KingÕs Day Holiday – No class

Jan 23    Failure theories for brittle matÕls, 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   PresidentÕs 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