To manufacture a piston with a circular cross section, an alloy steel bar is required whose length is fixed and has a value of 35 cm and must withstand a compression load of 5.2 tons. For its design, a safety factor of 4/5 is suggested with respect to the yield stress. The shear modulus for that alloy is 80 GPa. To know the resistance of this steel alloy, a compression test was carried out on a specimen of the same material, from this test the data table of stress against engineering deformation shown was obtained. Image 1 1) Calculate the increase in the diameter of the bar when the load is applied 2) Define the Poisson's ratio and calculate its value

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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To manufacture a piston with a circular cross section, an alloy steel bar is required whose length is fixed and has a value of 35 cm and must withstand a compression load of 5.2 tons. For its design, a safety factor of 4/5 is suggested with respect to the yield stress. The shear modulus for that alloy is 80 GPa.
To know the resistance of this steel alloy, a compression test was carried out on a specimen of the same material, from this test the data table of stress against engineering deformation shown was obtained.

Image 1

1) Calculate the increase in the diameter of the bar when the load is applied
2) Define the Poisson's ratio and calculate its value

 

Unit
Stress
deformation
(mm/mm)
(MPa)
0.001
206.8
0.002
413.7
0.003
434.4
0.004
441.3
0.005
441.3
0.006
441.3
0.007
441.3
0.05
620.5
0.1
668.8
0.15
682.6
0.2
689.5
0.25
641.2
0.3
572.3
0.35
511.6
Transcribed Image Text:Unit Stress deformation (mm/mm) (MPa) 0.001 206.8 0.002 413.7 0.003 434.4 0.004 441.3 0.005 441.3 0.006 441.3 0.007 441.3 0.05 620.5 0.1 668.8 0.15 682.6 0.2 689.5 0.25 641.2 0.3 572.3 0.35 511.6
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