Experimental investigation of cracking behaviors of ductile and brittle rock-like materials

Hao Bai; Wei Du; Yundong Shou; Lichuan Chen; Filippo Berto

doi:10.3221/IGF-ESIS.56.02

Experimental investigation of cracking behaviors of ductile and brittle rock-like materials

Authors

Hao Bai Sichuan Expressway Construction & Development Group Co., LTD, Chengdu, China
Wei Du Sichuan Expressway Construction & Development Group Co., LTD, Chengdu, China
Yundong Shou National Breeding Base of Technology and Innovation Platform for Automatic-monitoring of Geologic Hazards (Chongqing Engineering Research Center of Automatic Monitoring for Geological Hazards), Chongqing, China Wuhan University, China
Lichuan Chen National Breeding Base of Technology and Innovation Platform for Automatic-monitoring of Geologic Hazards (Chongqing Engineering Research Center of Automatic Monitoring for Geological Hazards), Chongqing, China Wuhan University, China
Filippo Berto Norwegian University of Science and Technology, Norway

DOI:

https://doi.org/10.3221/IGF-ESIS.56.02

Keywords:

Rock-like materials, Material composition, Ductility, Brittleness, Crack evolution

Abstract

The cracking characteristics of ductile rocks were studied by similar materials with sand, barite, epoxide resin, polyamide, silicone rubber and alcohol, while the cracking characteristics of brittle rocks were investigated by similar material with sand, barite, rosin and alcohol. In this paper, to enhance the application range of the rock-like materials in the field of geotechnical engineering model tests, the values of the elastic modulus and the compressive strength of the artificial rock-like materials are changed in a wide range by adjusting the amount of cementitious materials (epoxide resin, polyamide, rosin, etc). The elastic modulus, compressive strength and cracking characteristics were obtained from the complete axial stress–strain curves of the specimens made of similar materials, which were cast using the different mixture ratios. These experimental data can provide quantitative investigation on mixture ratios of similar materials of rocks to model the geotechnical engineering. Furthermore, the effect of mixture ratios on mechanical properties and crack propagation pattern of specimens were also investigated by the specimens with pre-existing flaws under uniaxial compressive tests

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Published

28-03-2021

Issue

Vol. 15 No. 56 (2021): April 2021

Section

Fracture

License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Copyright
Authors are allowed to retain both the copyright and the publishing rights of their articles without restrictions.

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How to Cite

Experimental investigation of cracking behaviors of ductile and brittle rock-like materials. (2021). Frattura Ed Integrità Strutturale, 15(56), 16-45. https://doi.org/10.3221/IGF-ESIS.56.02