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MECH 103 Mechanisms & Dynamicsof Machinery
Instructor: Prof Yi-Kuen LeeRoom: 2563 (Lift 27-28)Email: [email protected]
TA for tutorial: Zhengjian XU, Email: [email protected] 1205 (1/F, Lift19)
TA for homework: Wentao WANG, Email: [email protected] 4225 (4/F, Lift 24)
http://teaching.ust.hk/~mech103
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Course Description:Dynamics of particles, momentum method and impact;kinematics and kinetics of planar machinery, linkage andmechanisms, cams and gear trains.Part 1. DynamicsText book: Dynamics - Engineering Mechanics, SI Ed.
Bedford and FowlerPrentice Hall
The score of the Dynamics part will account for roughly 50%of the final grade.
MECH 103 Mechanisms & Dynamicsof Machinery
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MECH 103
Part II Mechanisms of MachineryText book: Design of Machinery
By Robert L. NortonMcGraw Hill Company
The score of the Mechanisms part will account for roughly 50% ofthe final grade.
Prerequisites: Vector Calculus and Analytical Geometry
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Grading Policy:The grade will be based on the results of homeworkassignments, midterm exam and final examinationwith the following weighting factors:
Homework 5% Class attendance 10%Mid-term 35% Final Exam 50%
Homework is due on specified date (TBA on thewebsite)Late homework will not be countedMid-term: 16 Oct 2008 (Thursday)
MECH 103 Mechanisms & Dynamicsof Machinery
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MECH 103
Important NoticeThe regular class schedule is as follows:Lecture hour: Tue, Thu
16:30-17:50 (Room 2502)Tutorial hour: Wed
17:00-17:50(Room 3007, Lift 3-4)
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MECH 103
Office hours:
Contact hour with TAs is to be arranged with
the TAs directly.
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Foundation of Mechanics
Mechanics is the science of force and motion
of matter including continuum mechanics,
theory of relativity, quantum mechanics,
statistical mechanics, molecular dynamics.
Ref: http://www.asme.org/pubs/amr/class.html
http://en.wikipedia.org/wiki/Mechanics
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Foundation of MechanicsBiology involves biomechanics related to structure
and function at all hierarchical levels from cells,tissues, organs, and individuals (not only biochem)(A living cell is not a continuum, but a protein machine, factory with internal machinery thatfunctions orderly according to laws of mechanics.)
Engineering (aero, mech, civil, chemical, materials, biomedical, biotechnological,
space, structural engineers develop and use fluid and solid mechanics)
make useful things that do not exist in nature andinvolve design and invention. Be concerned withsafety and economics.
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Foundation of MechanicsHistorical remarks
Galileo Galilei (1564-1642) treated the strength ofbeams and columns.
Bernoulli (1654-1705) introduced the simplebeam theory.
Newton (1643-1727): Newtonian mechanics
Euler (1707-1783) derived the column formula.
Coulomb (1736-1806) considered failurecriterion.
Lagrange (1736-1813) formulated the equationsof bending and vibration of plates.
Lagrangian mechanics
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Foundation of MechanicsHistorical remarks
Hooke (law, 1660)Navier (general equations of elasticity: solid mechanics,
1821)Cauchy (1789-1857, concept of stress and strain, linear
stress/strain relationship (Hooke’s law))Poisson (1781-1840, molecular theory of elasticity)Green (1793-1841), Stokes (1819-1903), Kelvin (1824-
1907)Truedell, Rivlin, Noll, Erikson, etc. (theory of finite strain,
more recent years)
http://www.hk-phy.org/
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Foundation of Mechanics
Hamilton (1805-1865): Hamiltonian mechanicsMicron, submicron, nano-structures with size and
strain gradient effect (multiple scales and multiple phase physics).Growth and remodeling of living tissues
(will lead mechanics to another plateau)
Tissue Engineering, Regenerative Medicine
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Foundation of Mechanics
Mechanics are a mainstay of our civilization
and are developed side by side with science
and technology
analytical solutions
computational methods
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Mechanics are a mainstay of our civilization
Engineering Mechanics: Airplanes, ships, rockets,spacecraft, automobiles, trains, rails, highways,buildings, engines.
Materials of design properties
Artificial heart valves, hearts, limbs, skin,pacemakers
Foundation of Mechanics
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Dec 30, 2002
Shenzhou IV takes off fromChina's Jiuquan launch center
Shenzhou V on Oct 15, 2003http://resources.emb.gov.hk/cphysics/mechanics/for/act_shenzhouV_e.html
http://www.unitedspacealliance.com/press/photo.htm
USA NASA Space Shuttle: Atlantis
Aerospace Engineering
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Hong Kong MTR Train
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Artificial Heart: AbioCor@
http://www.abiomed.com/
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BiomechanicsConstituents: living organism has a solid
structure (shape and size) and internal fluid flow(transport materials and keep organs alive) (cells make new materials).
Constitutive Equations: Biofluid is non-Newtonian. Biomaterials do not obey Hooke’slaw. The constitutive equations for DNA andother molecules are to be determined
Foundation of Mechanics
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Biomechanics
Hierarchy of sizes and mechanics:Gait, posture and sports: length of the whole body.
Hemodynamics of heart valves
Coronary atherosclerosis (hardening of blood vessel):diameter of the coronary arteries for hemodynamics, orthickness of the endothelial cell (micron) for shear stresson vessel wall, or cell itself for molecular mechanism.
Foundation of Mechanics
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BiomechanicsPerspectivesBiomechanics deals with DNA-controlled
changing materials.
Bio-mechanics is the new frontier formechanics!!
Foundation of Mechanics
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Working Model 2D:a computer aided dynamics simulator
http://www.workingmodel.com/
• Powerful physics-based 2D kinematic and dynamic motionSimulation and analysis
• Provides accurate solutions to complex engineering motionSimulation problems
• Save time and money by avoiding expensive prototyping andproduct failures
21http://teaching.ust.hk/~mech103 http://webboard.ust.hk/~MECH103
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Snapshot of Working Model 2D
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Snapshot of Working Model 2D
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Inverted Slider-crank
http://highered.mcgraw-hill.com/sites/0072470461/information_center_view0/
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Cylindrical cam mechanism
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Geneva mechanism
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Bevel gearautomobile transmission
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Gas pedal mechanism
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Drum brake mechanism
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US Sandia National Lab
http://www.sandia.gov
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http://world.honda.com/ASIMO/
Japan Honda ASIMO
32Prof Shigeo HIROSE, http://www-robot.mes.titech.ac.jp/
Biomemetic Robots
Titan IVOblix
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Multi-locomotion Robot
http://www.mein.nagoya-u.ac.jp/www_groups/robot04/MLR_Brachiation_kajima_jp.htm
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Multi-locomotion Robot learn from Nature
http://en.wikipedia.org/wiki/Gorilla
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Multi-locomotion Robot learn from Nature
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Mechanics courses in HKUST MECH Program
Mech 221 (521)Fluid Mechanics
Mech 593:Finite elementmethod
Mech 261:Control principles
Mech 101, 202Solid mechanics(mechanics of material,strength of material)
Mech 371Introduction to Robotics
Mech 373:Vibration
Mech 300F:Numericalmethods in Eng.
Mech 152:Design & Manufacturing I
Mech 252:Design & Manufacturing II
Mech 398, 399:Final Year Design Project I & II
Mech 098, 099Industrial Traning
Mech 523:ComputationalFluid Dynamics
Mech 283, 284Mech Laboratory I & II
Mech 251:CAD/CAM
Mech 103:Mech. & Dyn of Machinery
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PRS (Personal Response System)
-PRS can help students tohave interactive learning,not just listening the lecture
- PRS is useful for theclass with large number ofstudents
-The students’score will beonly used to add bonus inyour MECH103 final grade.
If you didn’t get the PRS handset, please get it in theAV counter (Rm 1030, Lift 1) by this week.
http://celt.ust.hk/ideas
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MECH 103
Important Notice
The lecture at 16:30-17:50, 14 Oct 2008 (Tue)will be swapped with tutorial session at 17:00-18:00, 8 Oct 2008 (Wed)
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http://www.witschi.com/download/Training_EN.pdf
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