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Finite Inelastic Deformations — Theory and Applications pp 525–536Cite as

True Triaxial Failure Tests on Cubic Rock Salt Samples. Experimental Methods and Results

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Summary

A constitutive equation for natural rock salt should take into consideration stress, strain, and volume change until failure, as well as failure itself, under various conditions. Therefore, equipment for precise true triaxial tests on cubic specimens and a special test procedure for quasi-static failure tests on rock salt have been developed. Deformation, volume change, and irreversible stress work were determined from the empirical data as a function of time. Failure strength was determined as well. First, a conservative equation for failure strength was determined from 12 test series.

The detailed results of 14 compression tests at various mean stresses are discussed. Stress conditions for the minimum volume (i.e. the compressible/dilatant boundary) were determined from the tests. The volume change at failure was between 1.5 and 7%. The calculated stress work at failure that is related to volume change and the stress work related to the shape change are also shown. The results have been used to derive a nonassociated elasto-viscoplastic constitutive equation for rock salt as shown in another paper.

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References

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  2. Hunsche, U., 1991: Volume change and energy dissipation in rock salt during triaxial failure tests. In: Mechanics of Creep Brittle Materials–2, Proc. of Coll. ‘Mechanics of Creep Brittle Materials 2’, Leicester (UK), Sept. 1991; A. Cocks and A. Ponter (eds.), 172–182. Elsevier: Amsterdam.

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  3. Hunsche, U., 1991: Volume change and energy dissipation in rock salt during triaxial failure tests. In: Mechanics of Creep Brittle Materials–2, Proc. of Coll. ‘Mechanics of Creep Brittle Materials 2’, Leicester (UK), Sept. 1991; A. Cocks and A. Ponter (eds.), 172–182. Elsevier: Amsterdam.

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  4. Hunsche, U., 1991: Volume change and energy dissipation in rock salt during triaxial failure tests. In: Mechanics of Creep Brittle Materials–2, Proc. of Coll. ‘Mechanics of Creep Brittle Materials 2’, Leicester (UK), Sept. 1991; A. Cocks and A. Ponter (eds.), 172–182. Elsevier: Amsterdam.

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Author information

Authors and Affiliations

  1. Federal Institute for Geosciences and Natural Resources, Stilleweg 2, W-3000, Hannover 51, Germany

    Udo E. Hunsche

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  1. Udo E. Hunsche
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Editor information

Editors and Affiliations

  1. Institut für Mechanik, Appelstraße 11, D-3000, Hannover 1, Germany

    Dieter Besdo (co-chairman) (co-chairman)

  2. Institut für Baumechanik und Numerische Mechanik, Appelstraße 9A, D-3000, Hannover 1, Germany

    Erwin Stein (co-chairman) (co-chairman)

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© 1992 Springer-Verlag Berlin Heidelberg

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Hunsche, U.E. (1992). True Triaxial Failure Tests on Cubic Rock Salt Samples. Experimental Methods and Results. In: Besdo, D., Stein, E. (eds) Finite Inelastic Deformations — Theory and Applications. International Union of Theoretical and Applied Mechanics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-84833-9_47

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  • DOI: https://doi.org/10.1007/978-3-642-84833-9_47

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-84835-3

  • Online ISBN: 978-3-642-84833-9

  • eBook Packages: Springer Book Archive

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