Compression Test of tubing - Santa Rosa Junior College
Transcript of Compression Test of tubing - Santa Rosa Junior College
![Page 1: Compression Test of tubing - Santa Rosa Junior College](https://reader030.fdocuments.in/reader030/viewer/2022012800/61b5aa94075393334e35b32e/html5/thumbnails/1.jpg)
Compression Test of tubing
SRJC, ENGR 45, Fall 2013 Cameron Phillips, Andre Espinoza,
Simran Singh
![Page 2: Compression Test of tubing - Santa Rosa Junior College](https://reader030.fdocuments.in/reader030/viewer/2022012800/61b5aa94075393334e35b32e/html5/thumbnails/2.jpg)
Compression tests were done on three samples of 304 stainless steel tubing and three samples of copper tubing , each sample had a different diameter and wall thickness. The purpose of this experiment was to compare the stress strain curves of tubing with the tensile stress strain curves.
![Page 3: Compression Test of tubing - Santa Rosa Junior College](https://reader030.fdocuments.in/reader030/viewer/2022012800/61b5aa94075393334e35b32e/html5/thumbnails/3.jpg)
![Page 4: Compression Test of tubing - Santa Rosa Junior College](https://reader030.fdocuments.in/reader030/viewer/2022012800/61b5aa94075393334e35b32e/html5/thumbnails/4.jpg)
304 stainless steel A.K.A 18-8
• <0.08% Carbon • <2.0% Manganese • <0.75% Silicon • <0.045% Phosphorus • <0.030% Sulfur • 18.0%<Chromium<20.0% • 8.0%<Nickel<10.5% • <0.1% Nitrogen
![Page 5: Compression Test of tubing - Santa Rosa Junior College](https://reader030.fdocuments.in/reader030/viewer/2022012800/61b5aa94075393334e35b32e/html5/thumbnails/5.jpg)
copper
99.9% pure copper
![Page 6: Compression Test of tubing - Santa Rosa Junior College](https://reader030.fdocuments.in/reader030/viewer/2022012800/61b5aa94075393334e35b32e/html5/thumbnails/6.jpg)
304 stainless samples
• Each sample was cut to 6 inches in length • 1: 1.00” diameter, 0.083” wall thickness, cross
sectional area= 0.2391 square inches • 2: 0.75” diameter, 0.065” wall thickness, cross
sectional area= 0.1399 square inches • 3: 0.50” diameter, 0.049” wall thickness, cross
sectional area= 0.0694 square inches
![Page 7: Compression Test of tubing - Santa Rosa Junior College](https://reader030.fdocuments.in/reader030/viewer/2022012800/61b5aa94075393334e35b32e/html5/thumbnails/7.jpg)
Copper samples
• Each sample was cut to 6 inches in length • 1: 1.00” diameter, 0.050” wall thickness, cross
sectional area= 0.1492 square inches • 2: 0.625” diameter, 0.040” wall thickness,
cross sectional area= 0.0735 square inches • 3: 0.250” diameter, 0.030” wall thickness,
cross sectional area= 0.0207 square inches
![Page 8: Compression Test of tubing - Santa Rosa Junior College](https://reader030.fdocuments.in/reader030/viewer/2022012800/61b5aa94075393334e35b32e/html5/thumbnails/8.jpg)
![Page 9: Compression Test of tubing - Santa Rosa Junior College](https://reader030.fdocuments.in/reader030/viewer/2022012800/61b5aa94075393334e35b32e/html5/thumbnails/9.jpg)
304 stress strain curve
http://www.chegg.com/homework-help/questions-and-answers/using-stress-strain-data-given-figure-18-8stainless-steel-determine--yield-stressb-tensile-q694223
![Page 10: Compression Test of tubing - Santa Rosa Junior College](https://reader030.fdocuments.in/reader030/viewer/2022012800/61b5aa94075393334e35b32e/html5/thumbnails/10.jpg)
Copper stress strain curve
http://www.copper.org/resources/properties/144_8/
![Page 11: Compression Test of tubing - Santa Rosa Junior College](https://reader030.fdocuments.in/reader030/viewer/2022012800/61b5aa94075393334e35b32e/html5/thumbnails/11.jpg)
Graphs from our data
0
1000
2000
3000
4000
5000
6000
7000
0 0.05 0.1 0.15 0.2
stress
Strain
304 stainless steel
1 inchdiameter0.75 inchdiameter
![Page 12: Compression Test of tubing - Santa Rosa Junior College](https://reader030.fdocuments.in/reader030/viewer/2022012800/61b5aa94075393334e35b32e/html5/thumbnails/12.jpg)
0
1000
2000
3000
4000
5000
6000
7000
8000
0 0.01 0.02 0.03 0.04 0.05
stress
strain
Copper stress strain
1 Inch diameter
0.625 diameter
0.25 inch diameter
![Page 13: Compression Test of tubing - Santa Rosa Junior College](https://reader030.fdocuments.in/reader030/viewer/2022012800/61b5aa94075393334e35b32e/html5/thumbnails/13.jpg)
Modes of Deformation in Compression Testing
http://www.instron.us/wa/applications/test_types/compression.aspx?ref=http://www.google.com/url
The figure to the right illustrates the modes of deformation in compression testing. (a) Buckling, when L/D > 5. (b) Shearing, when L/D > 2.5. (c) Double barreling, when L/D > 2.0 and friction is present at the contact surfaces. (d) Barreling, when L/D < 2.0 and friction is present at the contact surfaces. (e) Homogenous compression, when L/D < 2.0 and no friction is present at the contact surfaces. (f) Compressive instability due to work-softening material1.