Question

How
is a stress vs strain graph constructed using consolidation
data?

Answer #1

Consolidation test gives us the list of load or pressure applied to the specimen and its corresponding dial readings.

- The pressure applied is same as the stress experienced by the specimen. (N/mm2).

[OR]

If load (N) values are given then calculate its corresponding stress values by the formula,

Stress = Load/cross sectional area of the specimen.

- The dial readings indicate the change in length (length decreases as the pressure increases) of the specimen. As the initial length of the specimen is known, the strain in specimen for each increment of pressure value can be determined using the formula :

Strain = change in length /original length

= (difference of successive dial gauge readings )/ original length.

Thus the stress and strain values are obtained from the consolidation test data and can be plotted for stress strain curve.

(Please give a thumbs up ).

For data given: graph stress vs strain and draw failure
envelope
Height
2.864
in
Diameter
1.4
in
Vertical Displacement
Vertical Load
in
lb
0
0
0.0030305
0.54376
0.0058868
0.77679
0.008778
1.00983
0.011809
1.16516
0.01463
1.47586
0.017243
1.70896
0.020064
1.86426
0.023025
2.09736
0.025846
2.40806
0.028807
2.64106
0.031594
2.87416
0.03445
3.10716
0.037341
3.34016

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Extension, ∆L
(in)
0
0
1600
0.01
2500
0.02
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0.08
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0.20
4200
0.40
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0.60
4600
(max)
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4586
(fracture)
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