Lecture 1 2217 [Compatibility Mode]

7/28/2019 Lecture 1 2217 [Compatibility Mode]

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Mechanical Systems and DesignENGN 2217

Dr. Shankar KalyanasundaramTel: 6125 8369

Email:[email protected]

Office: R218 Ian Ross Building


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Contacts My Office hours: Monday, Tuesday, Thursday

--11-11.30 or by appointment For e-mail enquiries about the course, please

contact :

Wentian Wang at [email protected]


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Text Book Text Mechanics of Materials-SI edition

R.C Hibbeler A very good book with lots of examples

Earlier SI editions of the book are alsoadequate


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Contacts My Office hours: Monday, Tuesday, Thursday

--11-11.30 or by appointment For e-mail enquiries about the course, please

contact :

Wentian Wang at [email protected]


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Learning Activities

Lectures

4 Lectures /week

Monday 9-10, Tuesday 10-11, Wednesday 10-11,Thursday 10-11 All lectures scheduled in MCC T2

Interactive, student participation encouraged.

Learning Outcomes Understand the principles of structural mechanics. This includes:

1. Concepts of equilibrium, stress, strain and stress/strainbehaviour of deformable bodies

2. Axial, Torsion, Bending and Transverse Shear deformationbehaviour

3. Combined loading, transformation of stresses and bucklinganalysis


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Tutorials Learning outcomes

Learn by doing, Clarify the principlestaught in the lectures

Tutorials (1 hour/week)- Starts on week 3of the semester. non-assessable


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Mastering Engineering SystemMastering is an online tutoring system that:

Guides students through the solution of multi-step itemswith on-demand Hints and feedback for wrong answers

Includes many types of questions, including symbolicmath, fill-in-the-blank, numeric, and multiple-choice

Encourages students to work through items, movingincrementally toward a procedural understanding ofproblem types

Improves students' conceptual understanding and

problem-solving skills Helps students improve exam scores when compared

with traditional written and hand-graded homework


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Schedule for Mastering Engineering

Assignments

Typically, the assignment will be available on Fridayand will be dueon a Monday (or Tuesday if Monday is a public holiday) . This is

about 10 days to complete the assignment

Under any circumstances, No credit will be given for latesubmissions. This rule will be strictly enforced.

During the tutorials, assistance can be provided for about 30minutes

For students to avail of this help, prior attempts need to be made onthe assignment


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Mastering assignments Each assignment will consist of several problems

You can attempt each problem for a maximum of 12 times

If you cannot solve the problem within 8 attempts, seek assistance!

You can use hints in the mastering system without incurring anypenalty

A Bonus of 2% will be given for not using the hints After the due date, you can rework the problems for review

Expect about 8-10 of these assignments during the semester.


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ANSYS workshops

ANSYS is a software system used in structural analysis

Learning outcomes Develop a working knowledge of design modeler

Here you learn CAD skills for creating geometries and the interface ofANSYS

Develop a basic understanding of using Finite ElementAnalysis(FEA) for performing structural analysis in mechanicaldesign The subsystem is called ANSYS Mechanical

Tutorials will be provided on the wattle to learn these two

components of ANSYS


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More on ANSYS workshops

These workshops are self pacedallowing flexible

learning. You do them at a convenient time that suitsyou.

ANSYS is available only in the computers in theengineering building

We have 50 seat license limit at any given time


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Design Project

Individualdesign project on designing frame structures

using FEA The final design report is due on April 26 (week 8)


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Experimental Mechanics Laboratories

Leaning Outcomes Experiments on strain measurements to elucidate bending behaviour,

strain concentrations and principal strains of beams.

This will involve two3 hour laboratories

Photo elastic measurement of stress behaviour using Polariscopes.

This will involve one3 hour laboratory

These laboratories will be conducted on week 9, 10,11 in Room E102

There will be a total of 6 lab groups

Attendance of these labs is compulsory

Times: Monday 11-2 & 2-5, Tuesday, Wednesday, Thursday and Friday 12-

3 in weeks 9,10,11.

A lab report is due in week 12 (one week after completion of the three labs)-As an example, If someone completes the three labs on a Monday, it will bedue on Monday of week 12


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Summary of assessments

Individualdesign report due on April 26 (week 8) at

10 am 10 % Mid-semester exam (week 6) March 28 (Thursday)

10-11 am during the lecture time in MCC T2 -15%

Individualexperimental Mechanics laboratory report-due on week 12(starting on May 20) 15 %

Mastering engineering assignments approximately 8-10 of them and they will be due every week from week

4 15 % Comprehensive final exam 45 %


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Topics Stress (Chapter1 Sections-1.1-1.7) Strain (Chapter2 Sections - 2.1-2.2)

Mechanical properties of materials (Chapter3 Sections- 3.1-3.7) Axial Load (Chapter4 Sections- 4.1-4.7) Torsion (Chapter5 Sections -5.1-5.5,5.8) Bending (Chapter6 Sections - 6.1-6.5,6.9)

Transverse Shear (Chapter7 Sections - 7.1-7.2) Combined Loading (Chapter 8 Sections 8.1-8.2) Stress Transformation (Chapter 9 Sections 9.1-9.4) Deflection of beams and shafts (Chapter 12 Sections- 12.1-12.2,

12.5-12.7, 12.9)

Buckling of Columns (Chapter 13 Sections 13.1-13,3)


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Why Study Mechanical Design? How will you design

the wing of anaircraft?


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Structural design of Boeing 777


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Advanced Material Technology


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Structural design process

Structural Design of a componentStart with a Geometry

Estimate the forces, boundary conditions, materials

Develop a structural model

Analyze the model analytical, computational (FEA)

Compare the behavior with design metrics

Optimize the design


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Structural design examples


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Train crash


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Manufacturing


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Safety net design


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Toy design


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Drop test of Mobile phone

Documents

Lecture 1 2217 [Compatibility Mode]