oa Civil Engineering = Siviele Ingenieurswese - Shear strength of unsaturated soils
In Fig. 1 the Author showed a series of what he called Mohr envelopes representing the shear strength of unsaturated soils. The writer felt that a Mohr envelope could be drawn only in terms of intergranular stresses at failure and that a better title would be 'plot of shear strength versus total stress.' In addition, the assumption that the curve was tangent to the circles, as for example in graph 1, was surely wrong, and in the case of stability investigations, slightly on the unsafe side.
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