The Effect of Water Content on Axial Strain in a Loam Soil under Tension and Compression
1967
Farrell, D. A. | Greacen, E. L. | Larson, W. E.
A method is described for measuring axial strain in a remolded loam soil under unconfined axial loading in both compression and tension. Using this method the stress-strain relationships for the loam soil were determined for soil-water contents ranging from 2% to 12% by weight. The maximum tensile stress in a soil beam stressed to failure in a modulus of rupture test was computed from the measured stress-strain relationships. This computed fiber stress was approximately 10% greater than the measured tensile strength. The strain energy required to rupture this soil in axial tension, taken as the area under the stress-strain curve, was shown to increase by only 20% for a sixfold increase in tensile strength and to be almost proportionately related to the energy required to produce a fixed degree of soil breakup in a drop-shatter test.
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