A numerical study of chemical degradation effects on elastic-plastic behavior of sandstone

Abstract

In this paper, an elastic-plastic damage model is first proposed for a class of semi-brittle rocks. This model is then applied to investigate effects of chemical degradation on mechanical behavior of a red sandstone. Experimental data obtained from three groups of samples, respectively, immersed in water and two acid solutions will be analysed. Chemical degradation effects on both elastic modulus and compressive strength will be discussed in term of the solution acidity. The relationship between the solution acidity and chemical damage will be established.

Keywords:

• Damage
• plasticity
• rock
• sandstone
• chemical degradation
• acid solution

Disclosure statement

No potential conflict of interests was reported by the authors.

Additional information

Funding

This study was jointly funded by the National Key R&D Program of China through the grant number 2017YFC1501100, the Natural Science Foundation of China through the grant numbers 11672343 and 11602196 and the Fundamental Research Funds for the Central Universities through the grant number 2016B08014.