Design of Mechanical Components

ME314

Spring 2015, SDSU

Please check site frequently for changes

Announcements

• Sun April 26: I've added a frequently asked questions page to answer repeated questions from students.
• Fri April 17: URGENT - class is cancelled today as I have to submit an ABET document before noon
• Fri April 10 2015: Please see the handouts area for the lecture templates, and some of the chapters outlined
• Mon April 6 2015: Welcome back from spring break! Some updates and general announcements about how the evaluation will work, and what's going to happen the rest of the semester:

• -we will from now until the end of semester have one online quiz per week - these will replace the midterms and final as voted for in class nearly unanimously
  -I may give one or two in class multiple choice exam, depending on assessment of student behavior and performance but hope not to so we can use all our time for lectures
  -there will be three more homeworks not due on the week that a project is due where you will do problems and perform student peer assessments using solutions provided
  -a few lectures will be posted online for you to review if there is time, and you will have to turn in notes from the lecture, which will be compared for copying
  -we will have TWO conceptual design projects where you will not be required to build anything
  -if you don't attend class you will miss important information and it will negatively impact your grade
  -again recall this material is ABET-required, and not arbitrary, I cannot make large course changes in terms of content, but will consider your suggestions and work of course to improve the class always
• Fri 12:14am - I've added a handout to the handouts section about singularity functions
• Announcements will be posted here (and on blackboard), please check website regularly for updates.

Syllabus

Course Description

Course Catalog: Application of mechanics, physical properties of materials, and solid mechanics to the design of machine elements. Student design projects.

Additional: This class instructs students about the design of mechanical components from the high level 'big picture' down to the 'low level' component resolution. We will explore the design process for successfully integrating machine elements together into a design. This course dovetails with ME310, Introduction to Design, but is more on the theoretical side. Students will complete multiple design projects, but the projects are completed in the form of written reports and analysis, fabrication and testing is extra credit generally.

Course policies:

• Lectures will be given at the beginning of most class periods to explain new material and assignments.
• All projects are due on the Due Date – we will have one lecture window for extensions with grade penalty
  
• Some assignments will be turned in via blackboard
  
• Some assignments/ Projects will involve CAD work
• Not all work can be completed in class time. Extra time is will be required outside of the classroom. Check the Open lab E-301 for available time to complete assignments.
• There may be quizzes, pop quizzes, a midterm examination and a final examination.
• Students share the responsibility of checking their class scores.
• Backup all important files on your USB Thumb Drive.
• Tests, quizzes and assignments can ONLY be made up with a reasonable excuse.
• Contact the instructor via E-Mail if you are going to be absent.

Student learning outcomes

• Student learning outcomes: Upon Completion of this course the student will be able to:
  

  • SLO#1: Apply principles of mechanics to analyze the forces and moments that act on a mechanical component.
  • SLO#2: Apply the concepts of stress, strain, and stress-strain relations in the stress analysis of a machine element.
    
  • SLO#3: Predict failure of machine elements under static loads.
  • SLO#4: Predict fatigue failure of machine elements under time-varying, cyclic loads.
  • SLO#5: Apply modern engineering tools (i.e. Matlab, SolidWorks, Cosmos) in the analysis and communication of results.
  • SLO#6: Prepare technical reports and homework to effectively communicate the result of the analysis and design.
  • SLO#7: Apply the material learned under SLOs 1-5 to the analysis, selection, and design of specific mechanical elements such as shafts, fasteners, springs, rolling contact bearings, and gears.
    

• Program outcomes:
  • PO#1: An ability to apply knowledge of mathematics, science, and engineering.
  • PO#3: An ability to design a system, component, or process to meet desired needs.
  • PO#5: An ability to identify, formulate, and solve engineering problems.
  • PO#7: An ability to communicate effectively (0.5 - written reports only)
  • PO#9: A recognition of the need for, and an ability to engage in life-long learning
  • PO#11: An ability to use the techniques, skills, and modern engineering tools necessary for engineering practice.
  • PO#13: The ability to work professionally in both thermal and mechanical systems areas (0.5 - mechanical systems only).
    

Prerequisites

• ME 102, 202 (formerly 203) and 304 (or CIVE 301)

• Topics for review/background you should have walking into this course:
  • Phases of Design
    
  • Design factors
  • Concepts of Equilibrium, Stress, Strain, and Hooke's Law
  • Transformation of Stress Components (Mohr's Circle)
  • Shear and moment diagram
  • Deflection Analysis
  • Differential and Integral Calculus

Students with disabilities are encouraged to consult with the SDSU Disability Services for arrangements accommodating any special needs.

Assignments

• (click here to go to the assignments page)
• See the grading section for information about grading and %'s

References/Textbooks

Required readings:

• Norton, R. L., Machine Design - An Integrated Approach, 5th edition, Prentice Hall, 2014

Addtional optional references:

• Any Textbook on Mechanics of Materials , e.g. the textbook for ME 304 or CIV E 301.
• Warren C. Young, Roark's Formulas for Stress and Strain, McGraw Hill
• Statics reference: Beer, F., Johnson, E.R., and Mazurek, D., Vector Mechanics for Engineers: Statics, 10th ed., McGraw-Hill, 2012, ISBN 978-0077402280.
• Vector mathematics reference: Davis, H., and Snider, A., Introduction to Vector Analysis, 7th Edition, Wm. C. Brown Publishers, 1995, ISBN 0-697-16099-8
• Calculus reference: Stewart, J., Calculus: Early Transcendentals, 6th Edition, Cengage Learning 2007, ISBN 0538498676
• Quick reference (general, but take with a grain of salt): Wikipedia

Grading

Grading will follow the fill-the-bucket principle. For each homework assignment, project, and quiz, and for the Midterms and Final tests you will get score points. These will be added. The grade will be based on your score and the maximum achievable score. The course average will be scaled (only up if need be, not down!). There will be some extra credit to help you out as well, designed to increase your learning.

Tentatively:

We will be testing a method of grading which uses the class as a feedback system. If this works out well, it should improve student learning, and reduce the time to getting test results significantly.

 Cheating and Academic Honesty Policies

First of all please DON'T CHEAT!!! It detracts from your learning in this class, and it can detract from the learning of others as well. When you go into the world you won't have the skills you should have gained here. Our goal is to help you learn, so if you have any problems, please come speak with us and we will help you resolve them to the best of our ability. That being said, the definition of cheating must be clearly expressed:

Cheating on exams involves any form of copying from another student, giving or getting answers from another student, acquiring information in any way from an external source during the exam, or giving information to or receiving information from another individual which you should not receive during an exam (ie theories, data, answers, etc). You may ask questions during an exam of the instructor or TA's at any time. The TA's are not to give answers directly, but may provide hints.

Cheating on homeworks involves duplicating another person's code and/or written responses. You are to write your own code and generate your own answers, unless the instructional team provides a starter code/document, or sample code/documents for you to use. You may not use code/documents from sources other than this course. You may not copy another student's work. However, you ARE encouraged to help each other and discuss the homeworks and material from the course. It is often through explaining something that one learns that concept even better than before. But when it comes to writing the code/documents, you must do the actual writing yourself, and may not copy. This kind of problem solving is very much something you must do as well as study to learn it well, very similar to driving.

The Standard academic honesty policies of the university apply during this course as well (see below)

Institutions of higher education are founded to impart knowledge, seek truth, and encourage one's development for the good of society. University students shall thus be intellectually and morally obliged to pursue their course of studies with honesty and integrity. Therefore, in preparing and submitting materials for academic courses and in taking examinations, a student shall not yield to cheating or plagiarism, which not only violate academic standards but also make the offender liable to penalties explicit in Title 5.

Cheating shall be defined as the act of obtaining or attempting to obtain credit for academic work by the use of dishonest, deceptive, or fraudulent means. Examples of cheating include, but are not limited to (a) copying, in part or in whole, from another's test or other examination; (b) discussing answers or ideas relating to the answers on a test or other examination without the permission of the instructor; (c) obtaining copies of a test, an examination, or other course material without the permission of the instructor; (d) using notes, cheat sheets, or other devices considered inappropriate under the prescribed testing condition; (e) collaborating with another or others in work to be presented without the permission of the instructor; (f) falsifying records, laboratory work, or other course data; (g) submitting work previously presented in another course, if contrary to the rules of the course; (h) altering or interfering with the grading procedures; (i) plagiarizing, as defined; and (j) knowingly and intentionally assisting another student in any of the above.

Plagiarism shall be defined as the act of incorporating ideas, words, or specific substance of another, whether purchased, borrowed, or otherwise obtained, and submitting same to the University as one's own work to fulfill academic requirements without giving credit to the appropriate source. Plagiarism shall include but not be limited to (a) submitting work, either in part or in whole, completed by another; (b) omitting footnotes for ideas, statements, facts, or conclusions that belong to another; (c) omitting quotation marks when quoting directly from another, whether it be a paragraph, sentence, or part thereof; (d) close and lengthy paraphrasing of the writings of another; (e) submitting another person's artistic works, such as musical compositions, photographs, paintings, drawings, or sculptures; and (f ) submitting as one's own work papers purchased from research companies.

Instructional Team

Instructor:

C. Alex Simpkins, Ph.D.

Email: casimpkins "at" gmail "dot" com

Office: PS125

Office hours:

There will be three days of office hours (~1 hr per day, though I usually end up staying much longer) and you can make appointments, or find me (I'm going to spend significant time in E108, for example). We will discuss this in class.

TA's/graders:

• Robert Newcomb
• Email: robertnewcombta 'at' gmail 'dot' com

Labs and locations

• Lab locations: Computer labs, machine shop for resources