In this study artificial neural networks (ANN) are used to simulate the monotonic and cyclic
behaviour of sands observed in laboratory tests on Karlsruhe sand under drained and undrained conditions.
A genetic algorithm (GA) is used to obtain an optimal framework for the ANN. The results show that the
proposed genetic adaptive neural network (GANN) can effectively simulate drained and undrained
monotonic triaxial behaviour of saturated sand under isotropic or anisotropic consolidation. The GANN is
also able to predict satisfactorily the cyclic behaviour of sands under undrained triaxial test with strain and
stress cycles. In addition, GANN is able to distinguish between monotonic drained and undrained conditions
by delivering a good prediction when trained with the combined database.
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