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Elasto-plastic modelling of Red Wildmoor sandstone

✍ Scribed by Jean Sulem; Ioannis Vardoulakis; Euripides Papamichos; Ahmed Oulahna; Johan Tronvoll

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
339 KB
Volume
4
Category
Article
ISSN
1082-5010

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✦ Synopsis

On the basis of an extensive experimental program of axisymmetric triaxial compression and extension tests, the mechanical behaviour of a weak sandstone (Red Wildmoor sandstone) is analysed and modelled within the frame of the theory of elastoplasticity. Stress-dependent elasticity and damage are incorporated into the model. Pressure sensitivity of the plastic behaviour is described through a non-linear Mohr}Coulomb model with friction hardening and cohesion softening. Emphasis is given on the calibration procedure. Validation of the model is done through back analysis of the experimental tests. Shear-band analysis is performed on the basis of the extension of the constitutive model to non-coaxial plasticity.

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