Post on 03-Jan-2016
description
THE CRUSHED EXPERIMENT
By: Carlos Sanabria Justin Roose Phillip Munday
THE EXPERIMENT We are to apply a quasi-hydrostatic pressure on a
6” diameter pipe.
2Figure 1 – Sketch
Pipe under hydrostatic pressure
THE DESIGN PROCESS
Figure 2 – Transverse cross section of the pipe being compressed by six sections
3
Outer Ring
Hydrostatic Press
Spacing (incompressible
media)
Pipe
FINAL DESIGN (FALL)
4
Figure 3 – Final Design for the fall semester
Design for a surface pressure up to 10,000 psi
THE PROBLEM:
5
The strongest actuators that can accommodate our budget are not nearly as strong as our calculations assumed
Our sponsor advised that we should design around the actuator’s force
AVAILABLE ACTUATORS CONSIDERING OUR BUDGET
Figure 4 – Model Number RW50
Figure 5 – Model Number RW51 6
5.35 in
1.94 in
2.25 in1.63 in 4.34 in
4.85 in
Figure 6 – RW50 Dimensions
Figure 7 – RW51 Dimensions
ACTUATOR DIMENSIONS
7
NEW RING DIMENSIONS
Figure 8 – Ring Dimensions using RW50
Figure 9 – Ring Dimensions using RW51
19.68 in14.05 in
8
NEW SYSTEM… WHAT NEXT?
Figure 10 – New System Layout and next steps
New I-Beam Dimensions
Natural Rubber Insertion
Replacing Actuators
9
I - BEAMS
10
DesignationDimensions
Static Parameters
Moment of Inertia
Section Modulus
h (in)
w (in)
s (in)
Area (in2)
Weight (lb/ft) I (in4) Z (in3)
S 5 x 14.75 5 3.284 0.494 4.34 14.75 15.2 6.09S 5 x 10 5 3.004 0.214 2.94 10 12.3 4.92 S 4 x 9.5 4 2.796 0.326 2.79 9.5 6.79 3.39S 4 x 7.7 4 2.663 0.193 2.26 7.7 6.08 3.04 S 3 x 7.5 3 2.509 0.349 2.21 7.5 2.93 1.95S 3 x 5.7 3 2.33 0.17 1.67 5.7 2.52 1.68
h s
t
w
DesignationDimensions
Static Parameters
Moment of Inertia
Section Modulus
h (in)
w (in)
s (in)
Area (in2)
Weight (lb/ft) I (in4) Z (in3)
S 5 x 14.75 5 3.284 0.494 4.34 14.75 15.2 6.09S 5 x 10 5 3.004 0.214 2.94 10 12.3 4.92 S 4 x 9.5 4 2.796 0.326 2.79 9.5 6.79 3.39S 4 x 7.7 4 2.663 0.193 2.26 7.7 6.08 3.04 S 3 x 7.5 3 2.509 0.349 2.21 7.5 2.93 1.95S 3 x 5.7 3 2.33 0.17 1.67 5.7 2.52 1.68
I - BEAMS
h s
t
12.73 in
8.11 in
w
h 4 inw 2.796 ins 0.326 int 0.293 in
11
δ
Figure 11 – Ring Piece Dimensions and Deflection
I - BEAMS
12
NOT SIGNIFICANT!
I - BEAMS
13
4 in
2.796 in
0.326 in
0.293 in
Figure 12 – I - beam dimensions
NATURAL RUBBER INSERTION
14Figure 13 – A close up view of the natural rubber insertion
Natural Rubber Insertion
Dimensions have been recalculated with a rubber layer of 1/8”
REPLACING ACTUATORS BY STATIONARY
COLUMNS
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COLUMNS ARE CHARACTERIZED BY IT’S SLENDERNESS
RATIO
L = LENGTH OF THE COLUMN
K = RADIUS OF GYRATION
If the Slenderness Ratio < 10 The column is now bound by the Mechanical
Properties To ensure this:
L = 1.94 inch same length as hydraulic cylinders
Diameter > 0.776 inch Diameter is set to be 1 inch Made out of structural steel ASTM - A36
Same as I-beams
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REPLACING ACTUATORS BY STATIONARY
COLUMNS
17
REPLACING ACTUATORS BY STATIONARY
COLUMNS
Stress = 12 ksi
Strain = 0.0004
FINAL SYSTEM
Figure 14 – Final System
New I-Beam Dimensions
Natural Rubber Insertion
Columns
18
SOME DRAWINGS(SECTIONS)
19
3.05 in
2 in
3 in
2.4 in
Figure 15 – Section Drawing
CYLINDERS COLUMNS
20Figure 16 – Cylinder Drawing
Figure 17 – Column Drawing
1.9 in 1.9 in
I - BEAM
21
h s
t
12.73 in
8.11 in
h 4 inw 2.796 ins 0.326 int 0.293 in
w
Figure 18 – I - beam dimensions