An extended super/subloading surface model for soft rock considering structure degradation

Kai Cui; Bin Hu; Aneng Cui; Jing Li; Erjian Wei; Zhen Zhang

doi:10.1371/journal.pone.0258813

An extended super/subloading surface model for soft rock considering structure degradation

PLoS One. 2021 Oct 21;16(10):e0258813. doi: 10.1371/journal.pone.0258813. eCollection 2021.

Authors

Kai Cui^{1

2}, Bin Hu^{1

2}, Aneng Cui^{1

2}, Jing Li^{1

2}, Erjian Wei^{1

2}, Zhen Zhang^{1

2}

Affiliations

¹ School of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, Hubei, China.
² Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources, Wuhan, Hubei, China.

Abstract

The strain-softening and dilatancy behavior of soft rock is affected by the loading history and the development of structure. This study regards soft rock as a structured and overconsolidated soil and develops a new elastoplastic model based on the classical super yield surface Cam-clay model. The proposed model is capable of capturing the effect of yield surface shape on the mechanical behavior of soft rock by introducing a new yield function. The proposed model is validated against the triaxial test results on different types of soft rocks under drained condition. The comparison results indicate that the proposed model is suitable for describing the constitutive behavior of soft rock.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Geologic Sediments / analysis*
Geologic Sediments / chemistry*
Models, Theoretical*
Sand / chemistry*
Soil / chemistry*

Substances

Sand
Soil

Grants and funding

This work was supported in part by the National Natural Science Foundation of China under Grant U1802243 and Grant 41672317, in part by the Hubei Province Technical Innovation Special (major projects) Project under Grant 2017ACA184, and in part by the Major Science and Technology Projects of WUST Cultivate Innovation Teams under Grant 2018TDX01.