Degradation of weak sandstone and continuum damage model

Yii-Wen Pan*, J. Y. Lee

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


The study experimentally simulates in-situ degradation mechanisms to investigate the degradation of weak sandstone. Following different artificial degradation processes, the specimens are subjected to uniaxial compression. From the experimental results, it is noted that degradation of the tested weak sandstone results in a marked reduction in strength and elastic modulus and an increase in the failure strain. On the basis of the experimental results, a constitutive model is proposed to describe the mechanical behavior of weak sandstone. The presented constitutive model contains a hyperbolic pore/crack closure model and a continuum damage mechanics model. By comparing the simulated and experimental results, it is demonstrated that the proposed model can closely simulate the stress-strain relation of weak sandstone with very limited material parameters.

Original languageEnglish
Title of host publicationThe geotechnics of hard soils - soft rocks. Proceedings of the second international symopsium on hard soils-soft rocks, Naples, October 1998. (Two volumes).
EditorsA. Evangelista, L. Picarelli, A. Evangelista, L. Picarelli
PublisherA.A. Balkema
Number of pages9
ISBN (Print)9058090183
StatePublished - 1 Dec 1998
EventProceedings of the second international symposium on hard soils-soft rocks 1998. - Naples, Italy
Duration: 12 Oct 209814 Oct 2098


ConferenceProceedings of the second international symposium on hard soils-soft rocks 1998.

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