Assignment-3 (Total points-100)
Due date: Sep 15, 2016
1. At the proportional limit, a 2-inch gage length of a 0.375-in.-diameter alloy bar has elongated
0.0083 in. and the diameter has been reduced 0.0005 in. The total tension force on the bar was
4.75 k
Assignment-2 (Total points-100)
Due Date: Sep 8, 2016
1. A thin polymer plate PQR is deformed such that corner Q is displaced downward 1/16-in. to new
position Q as shown in. Determine the shear strain at Q associated with the two edges (PQ and
QR).
2. Th
Assignment-1 (Total points-100)
Due Date: Sep 1, 2016
1. The shaft is supported by a smooth thrust bearing (pin) at A and a smooth journal bearing (roller)
at B. Determine the resultant internal loadings acting on the cross section at C.
2. Determine the
Chapter 12
Kinematics of Particles
(Section 12.7-12.8)
Civil & Environmental Engineering Department
NORMAL AND TANGENTIAL COMPONENTS (12.7)
(APPLICATIONS)
Cars traveling along a clover-leaf
interchange experience an
acceleration due to a change in
velocit
Chapter 14
Kinetics of Particles:
Work and Energy
Civil & Environmental Engineering Department
Kinetics of particle: Work and Energy
Chapter Objectives
Develop the principle of work and energy and apply
it in order to solve problems that involve force, v
Chapter 12
Kinematics of Particles
Civil & Environmental Engineering Department
APPLICATIONS
The motion of large objects,
such as rockets, airplanes, or
cars, can often be analyzed
as if they were particles.
Why?
If we measure the altitude
of this rocket
Chapter 13
Kinetics of Particles:
Force and Acceleration
Civil & Environmental Engineering Department
APPLICATIONS
The motion of an object depends on
the forces acting on it.
A parachutist relies on the atmospheric
drag resistance force generated by her
p
Chapter 12
Kinematics of Particles
(Section 12.9-12.10)
APPLICATIONS
Rope and pulley arrangements
are often used to assist in lifting
heavy objects. The total lifting
force required from the truck
depends on both the weight and
the acceleration of the cab
1
Civil & Environmental Engineering Department
Homework # 3
1. A)
B) If the coefficient of kinetic friction between the 50-kg crate and the ground is k = 0.3,
determine the distance the crate travels and its velocity when t = 3 s. The crate starts from re
1
Civil & Environmental Engineering Department
Homework # 1
1. Traveling with an initial speed of 70 km/hr a car accelerates at 6000km/hr2 along a straight road.
How long will it take to reach a speed of 120 km/hr? Also, through what distance does the car
1
Civil & Environmental Engineering Department
Homework # 2
1.
2.
Take R = 30 m.
3.
2
Civil & Environmental Engineering Department
4.
If the end of the cable at A is pulled down with a speed of 2 m/s, determine the
speed at which block B rises.
5.
If the
California State University, Fullerton
College of Engineering and Computer Science
Department of Civil and Environmental Engineering
EGCE 302 - 02
Dynamics
SCH 13208
Fall Semester 2016
Instructor: Pankaj Bhattarai, PhD., P.E. Class Meeting: Mon/Wed10:00AM
1
Civil & Environmental Engineering Department
Homework # 1
1. A sieve analysis test was conducted on 600 grams of soil. The results are shown in the
Table.
a. Draw the Grain Size Distribution (GSD) curve based on ASTM system
b. Determine the effective si
Stress in Soil Mass
Stress System
Normal Stress (s) =
Shear Stress (t ) =
Sign Convention
N
A
T
A
Civil & Environmental Engineering Department
Stress in Different Planes
N Txy sin Fy cos Txy cos Fx sin 0
N Txy sin Fy cos Txy cos Fx sin
s n ( EF ) s x ( B
COMPACTION OF SOIL
Filed Compaction
Different types of rollers (clockwise
from right):
Smooth-wheel roller
Vibratory roller
Pneumatic rubber tired roller
Sheepsfoot roller
What is compaction?
A simple ground improvement technique, where
the soil is de
Classification of Soil
The Process of Placing Soil into various groups and/or
sub groups is called Soil Classification.
Classification Systems provide a common language to
concisely express the general characteristics of soils, which
are infinitely varie
SEEPAGE
Darcys law is applicable when flow of water is in one
direction
In real world problems, seepage occurs in all three
dimensions
In many cases, 3D problems are simplified to 2D and
seepage flow is calculated accordingly.
2D Flow Equation
Darcys Law
PERMEABILITY
Water flows in porous medium
Soils are assemblages of
solid particles with interconnected voids through
Which water can flow from a
point of high energy to a
point of low energy
What is Permeability?
A measure of how easily a fluid (e.g., wat
IN-SITU STRESS
In a given volume of soil mass, void space is filled with
either air or water or both
To analyze major problems in soil mechanics, we need to
know the distribution of stress in the soil profile
Stress Condition without seepage
H w ( H A H
Plasticity
Conceptual changes in soil phases as a function
of water content
Physical State
Slurry
Liquid
Liquid Limit Water content at the boundary
between a liquid and a plastic. Also the lower
limit of viscous soil flow.
Plastic
Plastic Limit Water cont
Grain Size Distribution
Particle size analysis
Course Grained
Boulder
Cobble
Gravel
Course
Fine
Sand
Course
Medium
Fine
> 12 in
3 12 in
4.75 mm (#4) 3 in
0.75 3 in
#4 0.75 in
0.075 mm (#200) #4
2 mm (#10) - #4
0.425 mm (#40) - #10
#40 - #200
Fine Grained
Phase Relationship
Civil & Environmental Engineering Department
3-Phase Diagram
Notation
W = weight
V = volume
s = soil grains
w = water
a = air
v = voids
Civil & Environmental Engineering Department
Definition (Volume Ratio)
Porosity (n) is a measure of
Origin of Soil and Grain Size
Civil & Environmental Engineering Department
Origin of Soil
The Earths Crust is composed of soil and rock
Rock is a natural aggregate of minerals which are
connected by strong bonding or attractive forces.
Soil may be defined
Dear class, I would like to say good morning to everyone here, and we hope our
presentation will not only provide more understanding about high speed rail but will enhance the
fruitfulness about how a high speed rail works so efficiently in a country very