Chapter 10 Cylinders
10.1
A journal bearing is to be manufactured with optimum geometry for minimum power loss
for a given load and speed. The relative clearance c/r=0.001. The journal diameter is
100mm. Find the accuracy to which the bearing parts have t
12 Hydrodynamic Bearings
12.1
To decrease the leakage past a seal of the type discussed in Example 12.1, the sealing gap
is tapered and the film shape is
dh
h (x ) = h0 + x
= h0 + kx
dx
Because of the roughness of the surfaces the outlet (minimum) film th
Chapter 2 Load, Stress and Strain
2.1
The stepped shaft A-B-C shown in sketch a is loaded with the forces P1 and/or P2. Note
that P1 gives a tensile stress in B-C and /4 in A-B and that P2 gives a bending stress
at B and 1.5 at A. What is the critical se
1
PreparedbyUfuk Can KADIOLU
Room: C-206 Phone: 5271
E-mail:ufukcan@metu.edu.tr
and 11. On the other hand the Basic Shaft System BSS is based on the maximum
Date: 01/10/2014
shaft diameter and the general form is h (ITn) / * (ITn) where * changes between
1
Prepared by: Ufuk Can KADIOLU
Room: C-206
Phone: 5271
E-mail: ufukcan@metu.edu.tr
the plane whose normal is parallel to x-axis, with y-direction in the
Date: 13/10/2014
ME 307 MACHINE ELEMENTS I
TUTORIAL 2
3D Stress State, Thick-Walled Cylinders, Therma
1
Prepared by: Kerem Doruk KATLIOLU
Room: D-106
E-mail: e174396@metu.edu.tr
Date: 20/10/2014
M3
ME 307 MACHINE ELEMENTS I
TUTORIAL 3
Bending of Curved Beams
F3
Prob.1. Following system is subjected to 100 N forces as shown. For the curved beam
with circul
1
Prepared by: Burak Nebil BARUTU
Room: B-183 Phone: 2557
E-mail: burakn@metu.edu.tr
Date: 24/10/2014
a) The half width of the contact region between the cam and the follower surface is:
(1 1 ) (1 2 )
E1
E2
2F
1
1
d1 d 2
2
ME 307 MACHINE ELEMENTS I
TUTORI
1
Prepared by: Kerem Doruk KATLIOLU
Room: G-156
Phone: 5246
E-mail: kdk@metu.edu.tr
Solution
Date: 31/10/2014
ME 307 MACHINE ELEMENTS I
TUTORIAL 5
STRAIN ENERGY &CASTIGLIANOS THEOREM
a. The total strain energy is the sum of the strain energies of all memb
1
Prepared by: Ufuk Can KADIOLU
Room Phone: C-206 5273
E-mail: ufukcan@metu.edu.tr
Solution: The beams should be checked against yielding and buckling failure
Date: 03.11.2014
(due to bending of the beams about y and z axes), and the structure should be c
x y z x y x z y z
Prepared by: Burak N. BARUTU
Room: B-183 Phone: 210 2557
E-mail: burakn@metu.edu.tr
2
Date: 06-Nov-2014
ME 307 MACHINE ELEMENTS I
TUTORIAL 7
STATIC DESIGN CRITERIA PART I
Question 1: A steel machine part is statically loaded and has a
DESIGN OF HELICAL GEARS
According to Fig 14-6&7 pressure angle is 20 degrees.
n 0.349
rad
0.34 9rad
Both gears are produced with hobbing. Therefore the minimum virtual number of teeth from the
Slaymaker's equation:
Assumed full depth involute tooth prof
Chapter 15 Fasteners and Power Screws
15.1
An Acme-threaded power screw with a crest diameter of 1 1/8 in. and single threads is
used to raise a load of 25,000 lbf. The collar mean diameter is 1.5 in. The coefficient of
friction is 0.1 for both the thread
Chapter 17 Brakes and Clutches
17.1
The disk brake shown in sketch a has brake pads in the form of circular sections with
inner radius r, outer radius 2r, and section angle /4. Calculate the brake torque when the
pads are applied with normal force P. The
Chapter 3 Solid Materials
3.1
A 2-m long polycarbonate tensile rod has a cross-sectional diameter of 130 mm. It is used
to lift a tank weighing 65 tons from a 1.8 m deep ditch onto a road. The vertical motion
of the cranes arc is limited to 4.2 m. Will it
Chapter 1 Introduction
1.1
Design transport containers for milk in 1 gallon and 1 liter sizes.
Notes: There are a number of design considerations that can be included in this problem. Some
examples are considered here, but the student should not be restri
Chapter 9
Columns
9.1
A yo-yo begins to move at the origin of the x-y axis (at point A) and is at its farthest point
from the origin at point B, as shown in sketch a. The string is 0.75m long, and its weight
is small relative to the weight of the yo-yo. F
Chapter 16 Springs
16.1
A guitar string is made of ASTM A228 steel music wire. To get the correct tone from the
string, a tension of 200N has to be applied. When the string breaks, it is replaced by a
string made of ASTM B159 phosphor bronze. What tension
13 Rolling-Element Bearings
13.1
In roller bearings the load is carried by rollers and the contacts between rollers and races
are rectangular. The bearing macrogeometry determines which type of load can be
carried by the bearing: radial, axial or moment l
Chapter 11 Shafting
11.1
A shaft assembly shown in sketch a is driven by a flat belt at location A and drives a flat
belt at location B. The drive belt pulley diameter is 300mm; the driven belt pulley is 500
mm. The belts are long relative to the sheave d
Chapter 7
Failure Prediction for Cyclic and Impact Loading
7.1
A tuning fork is hit with a pencil and starts to vibrate with a frequency of 440Hz. The
maximum bending stress in the tuning fork is 4MPa at the end positions. Calculate the
mean stress, the r
Chapter 4 Normal, Torsional, Bending, and
Transverse Shear Stresses and Strains
4.1
An area in the x-y coordinate system, as shown in sketch a, consists of a large circle
having radius r out of which are cut three smaller circles having radii r/3. Find th
Chapter 6 Failure Prediction for Static Loading
6.1
Given that the stress concentration factor is 3.12 for a machine element made of steel
with a modulus of elasticity of 207GPa, find the stress concentration factor for an
identical machine element made o
14 Gears
14.1
For gear transmissions there is a direct proportionality between the local sliding speed
experienced by the contacting surfaces and the power loss. For a normal spur or helical
gear the mean sliding speed is typically 20% of the load transmi
Chapter 18 Flexible Machine Elements
18.1
An open flat belt 10 in wide and 0.13 in thick connects a 16-in diameter pulley with a 36
in diameter pulley over a center distance of 15 feet. The belt speed is 3600 ft/min. The
allowable preload per unit width o
Chapter 5
Deformation
5.1
A beam is loaded by a concentrated bending moment M at the free end. The size of the
moment equals the maximum moment, or Pl. Find the vertical and angular deformations
along the beam by using the equation of the elastic line, Eq
Chapter 8
Lubrication, Friction and Wear
8.1
Describe the difference between conformal and nonconformal surfaces.
Solution:
Conformal surfaces fit snugly into each other, and they have very large contact areas.
Nonconformal surfaces have very small contac
Bevel Gear Design
Velocity ratio of the bevel gear pair is given in the interval 2.10< VRb<2.18 .
From Table 13-3 of Shigley
Select the number of teeth of the pinion " Nbp " as 13.
Nbp 13
27.3 N
2.10 bp 27.3
N
bg
According to the table, the minimum number