Thin layer shearing of a highly plastic clay

Balthasar, K.; Gudehus, G.; Külzer, M.; Libreros Bertini, A. B.

Shearing tests with a thin layer of clay between filter slabs render possible large and cyclic deformations with drainage. In the pressure range of 100 kPa they serve to validated visco-hypoplastic constitutive relations. This theory is also confirmed by tests with up to 14 MPa and super-imposed anti-plane cycles. After this kind of seismic disturbance the clay stabilizes if the ratio of permanent stresses is undercritical. Otherwise a spontaneous acceleration occurs after a delay. This could help to understand critical phenomena with clay smears in faults.

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Balthasar, K. / Gudehus, G. / Külzer, M. / et al: Thin layer shearing of a highly plastic clay. 2006. Copernicus Publications.

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