Mechanical Engineering
ME 3823 - Machine Element Design
Syllabus – Fall 2009
Part A-Course Outline
Required course in Mechanical Engineering
Catalog Description:
(3-0) 3 hours credit. Prerequisites: ME 1402 and ME 3813
Introduction to design of machine elements; pressurized cylinders, press and shrink fits, curved beams and contact
stresses; static and fatigue theories of failure; shafts and shaft components; welded and bolted connections,
mechanical springs, and computer-aided design projects. (Formerly ME 4423. Credit can not be earned for both
ME 3823 and ME 4423.)
Prerequisites:
ME 1402–Engineering Graphics, and ME 3813–Mechanics of Solids
Textbook(s) and/or Required Materials:
"Shigley’s Mechanical Engineering Design," Eighth Edition, by Richard G. Budynas and J. Keith Nisbett,
McGraw-Hill Companies, Inc., 2008
Major Prerequisites by Topic:
1. Internal forces and deformation in solids
2. Stress and strain relations
3. Stresses and deflections in beams and axially loaded members
4. Graphical, analytical, and computer-aided design techniques
Course Objectives:
To provide an opportunity to students to learn:
1. Fundamentals of mechanical design, design factor and factor of safety
2. Stresses in cylinders and curved members
3. Contact stresses and design of press and shrink fits
4. Failures resulting from static loading
5. Fatigue failure resulting from variable loading
6. Design of shafts and shaft components
7. Design of bolted connections in tension and shear
8. Design of welded connections in torsion and bending
9. Design of compression springs
10. Development of mini-design and machine design projects and reports
Topics Covered:
1. Fundamentals of mechanical design, design factor and factor of safety
2. Stresses in cylinders and curved members
3. Contact stresses and design of press and shrink fits
4. Failures resulting from static loading
5. Fatigue failure resulting from variable loading
6. Design of shafts, keys, and pins
7. Design of bolted connections in tension and shear
8. Design of welded connections in torsion and bending
9. Design of compression springs
10. Development of mini-design and machine design projects and reports
Class Schedule:
Fall 2009 ME 3823 – Machine Element Design Syllabus (Cont’d...)
•
3-50 minutes lectures /week
Contribution of the Course to Meet Professional Component:
The course builds foundation for preparing students in design of mechanical components.
Relationship to ME Department Objectives and Outcomes:
The course primarily contributes to Mechanical Engineering program outcomes that develop student abilities:
(a) Apply knowledge of mathematics, science, and engineering
(d) Work in multidisciplinary teams
(e) Identify, formulate, and solve engineering problems
(k) Use techniques, skills, and modern engineering tools necessary for engineering practice.
The course contributes in a secondary way to Mechanical Engineering program outcomes:
(c) Ability to design a system, component, or process to meet desired needs within realistic constraints such as
economic, environmental, social, political, ethical, health and safety, manufacturability, and sustainability
(g) Ability to communicate effectively
(i) Recognition of the need for, and an ability to engage in life-long learning
(l) to apply principles of engineering, basic science, and mathematics (including multivariate calculus and
differential equations) to model, analyze, design, and realize physical systems, components or processes; and
work professionally in both thermal and mechanical systems areas.
Evaluation Methods:
1. Homework assignments
2. Exams I and II
3. Final exam (comprehensive)
4. Computer-aided mini-design project and a formal report
5. Computer-aided machine design project:
• Project proposal
• Formal written report
Performance Criteria:
1. Objectives 1 through 9 will be evaluated using evaluation methods 1 through 3.
2. Objective 10 will be evaluated using evaluation methods 4 and 5.
Course Contents:
Engineering science:
Engineering design:
1 credit or 33.33%
2 credits or 66.67%
Persons who prepared this description:
Yesh P. Singh
2
Fall 2009 ME 3823 – Machine Element Design Syllabus (Cont’d...)
Part B – General Course Information and Policies
Meeting Time:
Lecture: MWF 8:00 a.m.-8:50 a.m., EB 2.04.04
Instructor:
Name:
Email Address:
Office:
Phone:
Office Hours:
Prof. Yesh P. Singh, Ph.D., P.E.
ysingh@utsa.edu
EB 3.04.08
458-5527
9:00 a.m.-10:15 a.m., MWF
2:30 p.m.-3:45 p.m., TR; and by appointment
Course Grade:
Exam I
Exam II
Exam III
Final exam
Homework assignments
Design projects:
Mini-Design Project
Design Project:
Proposal
Report
15
15
15
25
10
8
2
10
Total 100
Homework, Design Project, and Attendance Policies:
1. All homework assignments will be due on due date. No late homework will be accepted.
2. Cooperation tackling homework and design project work is encouraged and permitted; however, all homework
& design project work turned in should represent your own efforts.
3. Homework should be done on 8-1/2"x11" engineer's paper and identified by: ME 3823, student name,
homework number and date. Computer printouts for homework solutions are okay.
4. The group members must sign the group assignments (projects).
5. Design projects are group efforts and are mandatory. A quality mini-design project submitted on time could
earn up to 2 bonus points and a quality design project submitted on time could earn up to 3 bonus points that
will be applied to improve the grade in the course.
Examination Policy:
1. There will be four examinations: Exam I, Exam II, Exam III and the Final. The final examination will be
comprehensive.
2. Exams are open book. Note that an open-book exam is typically harder than a closed-book exam.
3. No make-up exams will be given.
UTSA Policies and Services Regarding Disabilities and Academic Dishonesty: these may be found online at
Disability: http://www.utsa.edu/disability/students.htm
Academic dishonesty: http://www.utsa.edu/infoguide/appendices/b.html under section 203
References:
1. “Fundamentals of Machine Component Design,” by Robert C. Juvinall. and Kurt M. Marshek
2. “Machine Design: An Integrated Approach,” by Robert L. Norton
3. “Design of Machine Elements,” by M. F. Spotts, and T. E. Shoup, and L.E. Hornberger
4. “Fundamentals of Machine Elements,” by Bernard J. Hamrock, Bo Jacobson, and Steven R. Schmid
5. AGMA, AWS, ASTM, SAE, and ASME codes and standards
6. SolidWorks, Lincages-4, ANSYS, Beam 2D, and other computer programs
3
Fall 2009 ME 3823 – Machine Element Design Syllabus (Cont’d...)
4
Fall 2009 ME 3823 – Machine Element Design Syllabus (Cont’d...)
Part C – Detailed Syllabus
Date
Topics
Asgmt. No.
Introduction
Fundamentals of mechanical design, design considerations, codes and
standards, uncertainties, design factor and factor of safety, reliability,
and dimensions and tolerances.
Stresses in cylinders, rotating rings, press and shrink fits
Curved members in flexure, contact stress
Failure Resulting from Static Loading
Static strength, stress concentration, ductile materials: maximumnormal, maximum-shear stress and distortion energy theories
Coulomb-Mohr theory, failure of ductile materials
Brittle materials: maximum normal stress, Coulomb-Mohr,
and modified-Coulomb-Mohr theories, selection of failure criteria
Review
1
2
3
Exam I
Fatigue Failure Resulting from Variable Loading
Introduction to fatigue, fatigue-life methods, stress-life and strain-life methods
Endurance limit and fatigue strength
4
Endurance limit modifying factors, stress concentration and notch sensitivity
Fluctuating stresses and fatigue failure criteria for fluctuating stresses
5
Mini-design project
Torsional fatigue strength, combination of loading models, and surface
fatigue strength
6
Shafts and Shaft Components
Shaft materials, shaft layout, and shaft stresses,
deflection considerations and critical speeds for shafts
Miscellaneous shaft components: screws, keys and pins;
limits and fits, stress and torque capacity in interference fits
Review
7
8
Exam II
Screws, Fasteners, and design of Joints
Thread standards, mechanics of power screws, and thread stresses, and
threaded fasteners
Submit design case study/design project proposal
Joints-fastener stiffness, joints-member stiffness, bolt strength
Tension joint - external load, bolt torque and bolt tension, statically
loaded tension joint with preload
Gasketed joints, fatigue loading of tension joints
Joints loaded in shear
Welding and Design of Welded Joints
Welded symbols, but and fillet welds, stresses in welded joints in torsion
Stresses in welded joint in bending, strength of welded joints
Strength of welded joints, static and fatigue loading of welded joints
Review
Exam III
5
9
10
11
12
13
Fall 2009 ME 3823 – Machine Element Design Syllabus (Cont’d...)
6
Fall 2009 ME 3823 – Machine Element Design Syllabus (Cont’d...)
Part C – Detailed Syllabus (Contd.)
Date
Topics
Asgmt. No.
Mechanical Springs
Stresses and deflection in helical springs, compression springs, stability
Spring materials
Design of compression spring for static service, and critical frequency of
helical springs
Fatigue loading and design of helical compression springs for fatigue loading
Review
Student study days: December 7 and December 8, classes do not meet
Final Exam: Monday, December 14, 7:30 a.m. – 10:00 a.m.
7
14
15