Engr Mech Dynamics

8/7/2019 Engr Mech Dynamics

1/22

CECS 1

Engineering Mechanics

The Basic Sequence


2/22

CECS 2

Kinematics


Newtonian Mechanics

Kinetics


3/22

CECS 3

Kinematics

Kinematics - the geometry of motion


Kinematics

Newtonian Mechanics

Kinetics


4/22

CECS 4

Kinematics

Kinetics (also Dynamics) - the study of forces causing

or resulting from a change

in motion

Kinematics

Kinematics - the geometry of motion


Kinematics

Newtonian Mechanics

Kinetics


5/22

CECS 5

Kinematics

Non-accelerating(Statics)

Accelerating(Dynamics)


Kinematics

Newtonian Mechanics

Kinetics


6/22

CECS 6

Kinematics

Single particle

System of particles

Rigid body/bodies

Deformable body

/bodies


Kinematics

Newtonian Mechanics

Kinetics

Single particle

System of particlesRigid body/bodies

Deformable body


/bodies

Single particle

System of particlesRigid body/bodies

Deformable body

/bodies



7/22

CECS 7

Kinematics

Single particle

System of particles

Rigid body/bodies

Deformable body

/bodies


Kinematics

Newtonian Mechanics

Kinetics

Single particle

System of particles

Rigid body/bodiesDeformable body


/bodies

Single particle

System of particles

Rigid body/bodiesDeformable body

/bodies


ENGR 2301

Statics


8/22

CECS 8

Kinematics KineticsKinetics

Single particle

System of particles

Rigid body/bodies

Deformable body/bodies


Kinematics

Newtonian Mechanics

Single particle

System of particles

Rigid body/bodies

Deformable body


/bodies

Single particle

System of particles

Rigid body/bodies



ENGR 2302

Dynamics


9/22

CECS 9

Kinematics KineticsKinetics

/bodies


Kinematics

Newtonian Mechanics

Single particle

System of particles

Rigid body/bodies

Deformable body


/bodies

Single particle

System of particles

Rigid body/bodies



ENGR 3306

Mech. of Materials

Single particle

System of particles

Rigid body/bodies

Deformable body


10/22

CECS 10


Course Sequence:

ENGR 2301

Statics

ENGR 2302

Dynamics

MENG 3306

Mechanics of

Materials

Kinetics ofnon-accelerating

particles, systems of

particles, and rigid bodies

Kinematics and kinetics of

acceleratingparticles,

systems of particles, and

rigid bodies

Statics, kinematics of

deformable bodies


11/22

CECS 11

ENGR 2302 Dynamics

Catalog description

Analysis of the kinematics and kinetics of particles,

systems of particles, and rigid bodies. Three hours of

lecture per week.

Prerequisites

ENGR2301, MATH 2414

Text

Engineering Mechanics: Statics & Dynamics, 11th

EditionbyR.C. Hibbeler. Published by Prentice Hall, Upper

Saddle River, NJ, ISBN0-13-221509-8, 2007


12/22

CECS 12

ENGR 2302 Topics Covered

Kinematics of particles Rectilinear and curvilinear motion

Relative motion.

Kinetics of particles

Newtons second law Work and kinetic energy; potential energy

Impulse and momentum methods.

Kinematics of rigid bodies Planar and three-dimensional.

Kinetics of rigid bodies Planar and (some) three-dimensional

Newtons second law

Work and kinetic energy; potential energy

Impulse and momentum methods.


13/22

CECS 13

ENGR 2302 Course Objectives

By the end of this course students will be able to:

Set up and solve particle kinematics problems using rectilinearand curvilinear, planar and three-dimensional, coordinatesystems.

Set up and solve kinetics of particles problems, planar and three-dimensional, using Newtons second law, work and energy, andimpulse and momentum methods.

Set up and solve kinematics of rigid bodies problems in planarand (some) three-dimensional coordinate systems.

Set up and solve kinetics of rigid bodies problems usingNewtons second law, work and energy, and impulse andmomentum methods.


14/22

CECS 14

ENGR 2302 Grading

COURSE GRADING

3 hour quizzes @ 25

points each75 points

Final exam 25 points

Homework/In-Class

performance

10 points

Semester Grade = (your total points/110) x 100


15/22

CECS 15

Why Take This Course? Whats Next?

Where will I use this material?

MEs

Fluid Dynamics (MENG 3310)

Dynamics of Machinery (MENG 3303)

Mechanical Systems Design (MENG 3309)

Tech electives such as Vibrations (MENG 4317)

FE exam

CEs

Fluid Dynamics (MENG 3310)

Tech electives

FE exam


16/22

CECS 16

End


17/22

CECS 17

ENGR 2301/2302 vs. MENG 3306

In Statics/Dynamics: RIGID bodies

Translate

Rotate

Remain fixed

In Mech. of Matls: DEFORMABLEbodies

Stretch

Bend Twist


18/22

CECS 18

ENGR 2301/2302 vs. MENG 3306

In Statics/Dynamics: Interested in Forces and

moments EXTERNAL to the body

In Mech. of Matls: Interested in INTERNAL

FORCES/ MOMENTSresulting from external

forces/moments


19/22

CECS 19

ENGR 2301/2302 vs. MENG 3306

First steps in problem solving similar for both

Statics/Dynamics and Mechanics of

Materials:

Draw a FREE BODY DIAGRAM

Solve for unknown external forces and moments

Fx = 0, Fy = 0, MA = 0


20/22

CECS 20

Similarities with Fluid Mechanics

Both have elegant mathematical theories describing

the media behavior

Theory ofElasticity, Navier-Stokes Equations, Continuum

Mechanics Both have commonly used technical or

engineering treatments that mostly predate the

mathematical theories

Beam bending, torsion, column behavior, etc. Bernoulli equations, Pascal equation, pipe friction, etc.


21/22

CECS 21

Similarities with Fluid Mechanics

Early mechanicists developed thesetechnical treatments based on empiricaldata and observations, motivated by need

Euler, Bernoulli, Hooke, St. Venant, Pascal,Timoshenko,

Most have been shown to be special caseswithin the more general theories

Until FEA and otherCFD, most engineersused the technical treatments exclusively


22/22

CECS 22

MENG 3306

Where will I use this material? MENG 3309 Mechanical Systems Design

CENG Structures, Soil Mechanics, Foundations

Senior Design FEA

What Courses Might Follow? Elasticity (The Mathematical Theory of )

Continuum Mechanics

Vibrations ofContinuous Media

Plates and Shells

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Engr Mech Dynamics

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