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February 19, 2026Geotechnical and Geological EngineeringOpen Access

Strength Parameter Estimation from Triaxial Data Using the Úcar Failure Criterion

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Authors

JGJuan GuaracheUniversity of the AndesLALuís E. ArleguiUniversidad de ZaragozaFTFrancisco Javier TorrijoUniversitat Politècnica de València

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Implication

Methodology estimates strength parameters in various rock types, suggesting improved predictions for geotechnical projects.

Key Points

  • This research aims to estimate uniaxial compressive strength and tensile strength using the Úcar failure criterion from triaxial test data.
  • Compiled triaxial test data from literature focused on brittle failure
  • Used nonlinear regression to model principal stress relationships for different lithologies
  • Calculated UCS and TS parameters to adjust ξ = TS/UCS using Taylor series expansion
  • Proposed failure envelope models for six rock types and concrete
  • Conducted comparative case study with Coburg limestone using different failure criteria
  • Successfully estimated UCS and TS values for various rock types
  • Demonstrated effectiveness of the Úcar criterion against other models
  • Showed potential for strength prediction even with limited data
  • Highlighted benefits in early-stage geotechnical projects with restrictive budgets

Cite This Study

Guarache et al. (2026) studied this question.

synapsesocial.com/papers/6996a7a5ecb39a600b3ed916https://doi.org/10.1007/s10706-025-03562-9
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Also Consider

Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1VI. The phenomena of rupture and flow in solids1921 · 11,015 citations
  2. 2Empirical Strength Criterion for Rock Masses1980 · 1,728 citations
  3. 3Brittle-ductile transition in rocks1968 · 587 citations
  4. 4Microfracturing and the inelastic deformation of rock in compression1968 · 660 citations