LOUISIANA TECH UNIVERSITY

Instructor: Dr. M. R. Corley

BH 249 (257-2859)

Text: Machine Design: An Integrated Approach, Robert L. Norton, Prentice-Hall, 1996.
 

DATE	TOPIC	READING
09/09	Introduction & Review	Chap. 1-5
HW: 6-3, 6-6, 6-10, 6-12, 6-37 (due 09/18)
09/11	Fatigue Under Simple Loads	6.0--6.11
LAB	Fatigue Testing (Fatigue Testing machine Operating Instructions) . Your report will be an informal summary of the calculations necessary to determine the amount of weight to place on the pan of the testing machine for each specimen. Start each calculation with the specimen hardness and throat diameter as measured in lab. Include in your report a load, shear, and bending moment diagram for the test apparatus. (due 09/18)
09/16	Fatigue Under Combined Loads	6.12--6.15
09/18	Surface Wear	7.0--7.8
HW: 7-3, 7-4 (due 09/30)
LAB	Fatigue Testing  Fatigue Test Results Sample # Average Rockwell Hardness (B) Dia. (in) Total Applied Load (lb) Life (cycles) 1 91.2 0.285 50  472,000 2 88.4 0.286 42  >1,200,000 3 78.9 0.3005 45 456,000 4 80.3 0.296 42 488,000  Prepare an informal report summarizing the results of the fatigue tests conducted last week. Explain any variances between the predicted and actual lives of the specimens. Construct an S-N diagram for this material. (due 09/25)
09/23	Surface Stresses and Failure Models	7.9--7.14
09/25	Shaft Loads and Stresses	9.0--9.9
LAB
09/30	Shaft Couplings and Attachments	9.10--9.18
HW: 9-1c, 9-2c, 9-8 (due 10/07)
10/02	Bearings and Lubrication	10.0--10.6
LAB	Introduction to ALGOR. (Here are instructions for setting up your account to run ALGOR.)
10/07	Rolling-Element Bearings	10.7--10.15
10/09	EXAM #1
LAB	Pressure on a flat disk
10/14	Spur Gears	11.0--11.7
HW: 10-1c, 10-8 (due 10/21)
10/16	Spur Gear Design	11.8--11.13
LAB	Axisymmetric solution to pressure on a flat disk
10/21	Helical Compression Springs	13.0--13.6
10/23	Extension and Torsion Springs	13.7--13.11
LAB
10/28	Power Screws	14.0--14.2
10/30	Threaded Fasteners in Tension	14.3--14.9
HW: 11-3, 11-14, 11-18 (due 11/06)
LAB	Axisymmetric solution to valve poppet.
11/04	Shear Loading of Fasteners	14.10--14.12
HW: 13-14, 13-20 (due 11/11)
11/06	Clutches and Disk Brakes	15.0--15.5
LAB	Valve poppet (continued)
11/11	Drum Brakes	15.6--15.7
11/13	FINAL EXAM
LAB	Final Exam Review

 

Grading

Exam 1	25%
FINAL EXAM	32%
Homework	10%
Design Laboratory	33%
TOTAL	100%

• All work submitted for grading is expected to be the original work of the person whose name appears on the paper. This includes examinations, homework, and designs. Any instance of academic misconduct will be considered a serious offense and will be punished appropriately. In accordance with Louisiana Tech University policy, this may include expulsion from the course with a grade of "F".
• The instructor's office hours will be announced in class and posted on the instructor's bulletin board and WWW page. Every reasonable effort will be made to keep these hours free for student consultation without appointment. Other times may be made available on an individual appointment basis.
• Grading of examinations, homework, and designs will be based on technical considerations (mathematical model adequacy, appropriateness of stated assumptions, computational accuracy, etc.) and non technical considerations (neatness, professional approach, grammar, spelling, etc.).
• Many of the problems and designs will require computer solutions. Twenty IBM PC-compatible computers located in BH 304. The laboratory is shared among all ME/IE courses and will be unavailable during periods when scheduled courses are using the room. Some problems will also be posed in a form suitable for solution by TK Solver or Mathcad. Both of these programs are installed on the computers in BH 304, and students are encouraged to buy a personal copies from an area bookstore.