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Fig. 5
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Frottement latéral en fonction du déplacement en tête de la tige (
ext ≈ 2 mm) rapporté à son diamètre, sous trois niveaux de contrainte verticale.
Lateral friction as a function of the displacement at the head of the rod (
ext ≈ 2 mm) relative to its diameter, under three levels of vertical stress.
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