Lecture 1 2217 [Compatibility Mode]
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Transcript of 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