Relating fragmentation, plastic work and critical state in crushable rock clasts

Abstract : Grain breakage during compression and shearing is one important mechanism responsible for irrecoverable changes of the mechanical properties of granular materials. Here we present results of triaxial tests on limestone fragments under some monotonic and cyclic stress paths and we investigate the relationships between the progression of grain breakage, the plastic work and the evolution of the critical state line. Using the plastic work concept, we propose a method for determining grain shape and grain breakage indices, and we show how grain breakage influences the critical stress state, and hence the mechanical behaviour. The validity of the relationships is then verified on different granular assemblies (granite fragments and quartz sands), although further tests remain necessary to validate them under more generic stress paths.
Document type :
Journal articles
Complete list of metadatas

Cited literature [45 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-02007111
Contributor : Christophe Dano <>
Submitted on : Monday, October 21, 2019 - 6:41:29 PM
Last modification on : Wednesday, October 23, 2019 - 11:09:01 AM

File

hu2018c.pdf
Files produced by the author(s)

Identifiers

Citation

Wei Hu, Zhen-Yu Yin, Gianvito Scaringi, Christophe Dano, Pierre-Yves Hicher. Relating fragmentation, plastic work and critical state in crushable rock clasts. Engineering Geology, Elsevier, 2018, 246, pp.326-336. ⟨10.1016/j.enggeo.2018.10.012⟩. ⟨hal-02007111⟩

Share

Metrics

Record views

67

Files downloads

12