Research Article
Determining Tensile Strength of Rock by the Direct Tensile, Brazilian Splitting, and Three-Point Bending Methods: A Comparative Study
Table 6
Results of direct tensile test of marbles.
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Description: (1) elastic modulus Et is the ratio of tensile stress to tensile strain in the middle of the rock sample, which is the tensile elastic modulus; (2) elastic modulus E2 is the ratio of stress to strain at another point of the sample (20 mm upper of the middle of the sample); (3) each sample has 4 strain gauges, 2 on the front and back planes, and the corresponding positions are connected in series (240 Ω) for measurement. |