Relation between normalized axial stress and failure strain in heterogeneous carbonate rocks exhibiting large axial strains

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

A semi-analytical equation for the modeling of stress-strain relationship for heterogeneous carbonate rocks exhibiting large axial strains (ε af>1%) is formulated. The equation is derived by modifying the stress-strain model based on Haldane's distribution proposed by Palchik (2006) for carbonate rocks exhibiting ε af ≤ 1%. The developed exponential model is used to relate normalized axial stress (σ ac) over the whole pre-failure strain range to current axial strain (ε a) and failure strain (ε af). For carbonate rocks exhibiting ε af>1%, the value of pre-calculated parameter d involved in the stress-strain model is not constant, but dependent on the failure strain value (ε af). The normalized stress-strain model can be used to calculate the failure strain in terms of uniaxial compressive strength and stress-strain measurement at one point only. The advantages of the failure strain model and ways of its use in engineering practice are discussed.

Original languageEnglish
Pages (from-to)217-224
Number of pages8
JournalRock Mechanics and Rock Engineering
Volume45
Issue number2
DOIs
StatePublished - 1 Mar 2012

Keywords

  • Failure strain
  • Heterogeneous rocks
  • Stress-strain response
  • Uniaxial compressive strength

Fingerprint

Dive into the research topics of 'Relation between normalized axial stress and failure strain in heterogeneous carbonate rocks exhibiting large axial strains'. Together they form a unique fingerprint.

Cite this