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Il résulte des essais triaxiaux que la pression de confinement inhibe fortement le processus de dilatance dans les grès à grain moyen testé dans les conditions de compression triaxiale conventionnelle. Le phénomène de dilatance était également limité de façon significative par la contrainte principale intermédiaire. Alors que l’importante déformation dilatante correspondait à la contrainte différentielle...
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