Problem Set #4
Solutions
from Norton (2005)
1. Figure P9-8 shows the last stage in a gear box with dual output. The gear is manufactured integrally with the shaft. The shaft is supported by two self-aligning ball bearings. Crank arms are connected to each
ME 338 Fall 2013
Homework #2
1. (5 Points) Figure 1 shows two spur gears
mounted on a shaft at A and C. The shaft material
is AISI 1095 steel Q & T at 800 deg F. This shaftgear assembly is supported on two pedestal
bearings at D and B respectively. Let Fc
ME 338 Fall 13
1.
Homework #5
Due: Nov 11, 2013
(5 Points) A belt drives a fan through an electric motor running at 1500 rpm. The
diameters of the pulley and motor are 500 mm and 355 mm respectively. The
flat belt selected has a width of 100 mm, thickness
ME 338 Spring 13
Problem Set #7
Due: 04/24/13
20 kN
1. The figure above shows a ball bearing enclosed in a pillow block that supports one end of a
rotating shaft. A static load of 20 kN is applied on the block by the shaft. A Class 5.8 high
strength metri
ME 338 Fall 10
Problem Set #4
Due: Friday 10/15/10
1. A paper machine processes rolls of paper having a density of 984 kg/m3. The paper roll is 1.50-m OD x 22-cm ID x 3.23-m long and is on a simply supported, 22-cm OD, steel shaft with Sut=400 MPa. Find t
1. The figure above is a 1-in solid round shaft supported by self-aligning bearings at A and B. Attached to the shaft are two chain sprockets that are loaded as shown. Treat this as a static design problem, ignoring fatigue and stress concentration. Draw
ME 338 Fall 2013
Homework #3
Due: 10/16/2013
1. (5 Points) A simply supported steel shaft with 30mm diameter and a 775mm span
between bearings carries two gears weighing 180 N and 250 N. The 180 N gear is
located at 175mm from one of the bearings and the
ME 338 FALL 09
Problem Set #3
Solutions
1. For the bicycle pedal-arm assembly in Figure P6-1 assume a rider-applied force that ranges from 0 to 1500 N at the pedal each cycle. Determine the fluctuating stresses in the 15-mm-dia pedal arm. Find the fatigue
ME 338 Fall 2010 Problem Set #3
Due: 10/5/2010
1. The figure above shows a portion of a pump that is gear-driven at uniform load and speed. The shaft is supported by bearings mounted in the pump housing. The shaft is made of steel having Su = 1000 MPa and
Solution:
Length of Smallest link:S= 1
Length of Largest Link: L=3.61
Other two links: P=2.4,Q=1.41
S+L = 4.61 > 3.81
This is a Type 3 Double rocker Mechanism
Degree of Freedom:
Problem 1 (on the left) :
Number of Links: n = 6, No of 1-degree of freedom
Two Different Approaches to
Finding Clamped Area
Stiffness, km
Differences between
Norton 3rd ed. and
Norton 4th ed.
3rd
4th
3rd
4th
3rd
4th
3rd
4th
3rd
4th
3rd
4th
4th
4th
Planar
Mechanisms
ME 338 Spring 2013
References
Design of Machinery (Robert Norton)
Mechanism Design (Erdman Sandor et al.)
Kinematic Models Library - Cornell (
http:/kmoddl.library.cornell.edu/)
Software
Working Model (Meter Lab)
ADAMS (Meter Lab)
SAM (w
ME 338
Lecture #8 Beam Deflections Continued
Outline
Group Assignments Survey
Stepped Shafts
Beam Deflections
Energy Methods
Castiglianos Theorem
In Class Exercise
Stepped Shafts
Determine the deflection curve and the deflections at B and C.
L/2
L/
ME 338
Lecture #5 Principal Stresses
Outline
In Class Assignment
Review from last class
Principal Stresses
Mohrs Circle
In Class Assignment
A design engineer at your firm has come up with two designs for
diving boards but does not know which will see
ME 338
Lecture #7 Beam Deflections
Outline
Beam Deflections
By straight integration
By superposition
By Singularity functions
Beam Curvature and Moment
Curvature of beam subjected to bending moment M
Curvature of plane curve
Slope of beam at any po
ME 338
Lecture #3 Load Analysis
Announcements
Lecture notes posted on Canvas
Test schedule survey on Canvas
Homework #1 will be posted on Canvas before next class
Outline
Finish Materials
Heat treatments
Quenching
Tempering
Annealing
Manufacturin
ME 338
Lecture #6 Normal and Shear Stresses in Beams
Outline
Reminder
Homework #1 Due Friday
Stresses in Beams
Axial Tension
Direct and Bearing Shear
Pure Bending
Transverse Shear
Torsional Stresses
Example Problems
In Class Exercise
Applied vs. Prin
ME 338
Lecture #4 Beam Loading
Announcements
Homework #1 Posted
1st Test will be 7-10pm on Wednesday October 2nd
There will be no class that day
We will have class on Friday, October 4th
Outline
Beam Loading
Shear and Moment Diagrams
Graphical Solu
ME 338 Spring 2013
Homework #1
Due: 09/24/13
1. A vertical force P on the foot pedal of
the bell crank is required to produce a
tension T of 445 N in the vertical
control rod. Determine the
corresponding bearing reactions at A
and B.
T = 445 N
2. A freewa
Machine Elements ME 338 Syllabus Spring 2013
Unique number: 18105
Lecture
TTh 12:30 1:45 pm, ETC 2.108
Instructor
Dr. Matt Campbell
Office: ETC 4.146D
Phone: 232-9122
email: [email protected]
Knowledge, skills, and abilities
students should have before