Machine element design

MECH393 MACHINE ELEMENT DESIGN COURSE OUTLINE - WINTER 2010

PROF. PASINI DAMIANO DEPARTMENT OF MECHANICAL ENGINEERING

MACHINE ELEMENT DESIGN

MECH393

GENERAL INFORMATION Course Description: The design of machine elements for strength requirements in consideration of various methods of manufacture. Synthesis of mechanical systems to fulfill performance requirements, following the engineering design process. Static and fatigue failure prevention. Students form groups to work on a design project.

Lectures

Tuesdays and Thursdays at 1:05pm- 2:25pm in MD279

Tutorials

Fridays at 3:35pm - 4:25 pm in MC11

Credits

3, (3-1-5)

Prerequisites

Prequisites MECH 260 and MECH 289 and CIVE 207. Pre-/corequisites: MECH 292 and MECH 314 and MIME 260.

Instructor

Damiano Pasini

Office

MD 372

Office hours

Tuesday and Thursday 2:30pm- 3:30pm If you need to meet at a different time, please request by email

Tel

514 398 6295

Email

Through Web CTVISTA

Teaching Assistants Office

Arabnejad Khanoki: Sajad [email protected] Faisal, Md Tanvir: MD 256

[email protected]

COURSE OUTLINE

Winter term, 2010

MACHINE ELEMENT DESIGN

MECH393

LEARNING OUTCOMES The main objective of the course is to learn how to design machine elements to prevent static and fatigue failure. By the end of the course, you should be able to  Determine stress, strain and deflections for given geometries and configurations; Fundamentals  Select materials for specified applications;  Solve failure problems using static and fatigue failure theories;  Identify functions, types of transmitted loads, and applications of selected machine elements;  Predict failure in machine elements;  Design shafts, fasteners, and gears under static and variable loading  Synthesize elements in a mechanical system;  Work cooperatively in groups;  Present ideas and technical material in an engineering report

Machine elements analysis and design Engineering skills

INSTRUCTIONAL METHOD

Classes: two lectures of 1h 20 min will be given each week. During class the key concepts will be introduced by using both slides and board, explanatory basic examples will be illustrated to help student learning. The slides will be poster on WebCTVISTA but they are useful only with the notes you will write in class. Occasionally, I might ask you to form groups of up to five students to solve problems in class, while I will circulate to answer questions. You may submit your work at the end of the allocated period, which will contribute towards a participation bonus (see participation adjustment in the evaluation scheme). Tutorials: although the assigned tutorial time is on Friday (recall that this time was assigned and not selected by the instructor, who would have definitely preferred another time), please make sure to attend it. You will have to form groups of up to five students to work on assigned problems. A typical tutorial session will entail two parts. In the first portion of tutorial, the TAs will circulate among student groups to provide guidance and answer questions; then in second part, one TA will solve the exercise/s in front of the whole class. It is expected that on your own you try sample problems from the textbooks. The solution will be posted also on WebCT. Note that the first tutorial will be held on Friday, January 8, 2010. COURSE OUTLINE

Winter term, 2010

MACHINE ELEMENT DESIGN

MECH393

EVALUATION SCHEME Homework Assignments Midterm 1 Midterm 2 Project Report Total

15% 30% 30% 25% 100%

Participation adjustment: between -5% and +5% Homework Assignments will be regularly released on WebCT; you will be able download the problems and submit the solution a week later from the release date. Please keep a copy of each assignment for your records. Late assignments will receive a grade of zero. In case of extreme circumstance, a delayed of two days might be accepted, but this is allowed only once in the term. It is important to present your assignments and report in a clear and order manner. An example of tidy assignment will be uploaded in WebCT. Although it is not necessary to follow this example, please note that either an unclear, and/or disorganized and/or unnamed assignment will be penalized up to 10% of the homework grade. Midterm 1 will be held in class (see tentative timeline for dates) and will cover the part of the fundamentals. Midterm 1 will be open book and faculty standard calculators will be allowed. Midterm 2 will be held in class (see tentative timeline for dates) and will cover the analysis and design of selected machine elements. Midterm 2 will be also open book and faculty standard calculators will be allowed. Project report: An open-ended design project will be assigned to you by the end of January. Your task is to form teams of 4 members in the first two weeks. The relevant dates are the following - By January 22: send an email to the TAs with the group formation, specified by the name of the four members. If you are unable to find a team, then you will be assigned one. - End of January: Project assignment, with guidelines for report. - End of Term: Submit report. Participation +/-: The final grade, out of 100%, may be increased according to your participation in the in-class and tutorial problems (up to +5%). On the other hand, excessive disruption during classes or tutorials will decrease your final grade. COURSE OUTLINE

Winter term, 2010

MACHINE ELEMENT DESIGN

MECH393

COURSE RESOURCES Recommended Book Fundamentals of machine elements, B.J. Hamrock, S. R. Schmid, B. Jacoson, Second Edition, 2005 Suggested Reference You are encouraged to consult other books and practice additional exercises. For example, another good book you can resort to is: Mechanical Engineering Design, by Joseph E. Shigley, and Charles R. Mischke, and Richard G. Budynas, McGraw-Hill, eight edition, 2007. TA support Teaching assistants support student learning by solving design problems during tutorial and lecture time, if necessary. In addition, TAs provide guidance also on the Term Project. WebCT VISTA. In order to access course materials, you need internet connection. Please note that the new department policy is to “Save Trees”, starting by avoiding printing papers. Therefore, no hand out will be given to the students and only electronic copies of the relevant material will be uploaded on WebCTVISTA

COURSE OUTLINE

Winter term, 2010

MACHINE ELEMENT DESIGN

MECH393

PROVISIONAL COURSE CONTENTS AND TIMETABLE The course is structured into three modules. The first is the shortest as it reviews basic concepts of structural mechanics. The second provides students the fundamentals for the analysis of static and variable loading failures. The third module builds on the first two and applies the gained knowledge to the design of selected machine elements. The table below shows a provisional schedule of the main topics per week. Lectures

Day

Date

Content

Module

L1

Tuesday

January 5

Introduction

L2

Thursday

January 7

Load analysis

L3

Tuesday

January 12

Stress Analysis

L4

Thursday

January 14

Deflection and stiffness

L5

Tuesday

January 19

Material selection

L6

Thursday

January 21

Stress concentration

L7

Tuesday

January 26

Static failure theories I

L8

Thursday

January 28

Static failure theories II

L9

Tuesday

February 2

Fatigue failure theories I

L10

Thursday

February 4

Fatigue failure theories II

L11

Tuesday

February 9

Fatigue failure theories III

L12

Thursday

February 11

Case Studies

L13

Tuesday

February 16

Review

L14

Thursday

February 18

MIDTERM 1

Review of the basics

Fundamentals

Study break: February 21 to 27 L15

Tuesday

March 2

Shaft I

L16

Thursday

March 4

Shaft II

L17

Tuesday

March 9

Shaft III

L18

Thursday

March 11

Screw and Fasteners I

Machine

L19

Tuesday

March 16

Screw and Fasteners II

Analysis and

L20

Thursday

March 18

Screw and Fasteners III

Design

L21

Tuesday

March 23

Gears I

L22

Thursday

March 25

Gears II

L23

Tuesday

March 30

Gears III

L24

Thursday

April 1

MIDTERM 2

L25

Tuesday

April 6

Case Studies

L26

Thursday

April 8

Case Studies

Tuesday

April 13

Project submission COURSE OUTLINE

Winter term, 2010

MACHINE ELEMENT DESIGN

MECH393

RIGHT TO SUBMIT IN ENGLISH OR FRENCH In accord with McGill University’s Charter of Students’ Rights, students in this course have the right to submit in English or in French any written work that is to be graded.

ACADEMIC INTEGRITYS McGill University values academic integrity. Therefore all students must understand the meaning and consequences of cheating, plagiarism and other academic offences under the Code of Student Conduct and Disciplinary Procedures (see www.mcgill.ca/integrity for more information). L'université McGill attache une haute importance à l’honnêteté académique. Il incombe par conséquent à tous les étudiants de comprendre ce que l'on entend par tricherie, plagiat et autres infractions académiques, ainsi que les conséquences que peuvent avoir de telles actions, selon le Code de conduite de l'étudiant et des procedures disciplinaires (pour de plus amples renseignements, veuillez consulter le site www.mcgill.ca/integrity)

DISABILITY “If you have any disability please contact the instructor to arrange a time to discuss your situation. It would be helpful if you contact the Officer for Students with Disabilities at 398-6009 before you do this.”

COURSE OUTLINE

Winter term, 2010