Column Control DTX
Measure Stress-Strain Curves by Instrumented Indentation

Measure Stress-Strain Curves by Instrumented Indentation

Application Notes

Three samples of shale rock, two from the Eagle Ford play, and one from the Haynesville play, were successfully tested by instrumented indentation. Results were remarkably repeatable, and hardness and Young’s modulus were independent of force for test forces above 300 mN. For the two samples from the Eagle Ford play, the reduced moduli were 54.3 GPa and 40.6 GPa, and the hardness values were 1.55 GPa and 1.12 GPa. For the Haynesville sample, the modulus was 22.5 GPa and the hardness was 0.51 GPa. By assuming a Poisson’s ratio of 0.25 and negligible work hardening, stress-strain curves were deduced from these indentation measurements.

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Column Control DTX