Statistical Damage Model of Altered Granite under Dry-Wet Cycles

Zhe Qin,Ping He,Jianye Li,Xuxin Chen,Yanping Gong

doi:10.3390/sym11010041

Abstract

This paper presents a new statistical damage constitutive model using symmetric normal distribution. The broken rock microbody obeyed symmetric normal distribution and the equivalent strain principle in damage mechanics. The uniaxial compression tests of samples subjected to dry-wet cycles were performed. The damage model was established using the equivalent strain principle and symmetric normal distribution. The damage variable was defined by the elastic modulus under various dry-wet cycles. Parameters of the damage constitutive model were identified using MATLAB software, and the proposed model is verified to be in good agreement with uniaxial compression test results. Fracturing of the rock microbody is well described by symmetric normal distribution, and the proposed statistical damage constitutive model has good adaptability to the uniaxial compression stress-strain curve.

Highlights

Rocks and soils are engineering materials that are widely utilized in geotechnical engineering.Rock heterogeneity and anisotropy makes the investigation of rock constitutive relations complicated and difficult
With the development of continuum damage mechanics, the concept of effective stress and strain equivalent hypothesis provides a mechanical basis for establishing rock damage constitutive models
Aiming at the construction of rock damage constitutive model of dry-wet cycles, this paper considers the mechanical damage caused by dry-wet cycles and uniaxial loading, defines the considers the mechanical damage caused by dry-wet cycles and uniaxial loading, defines the comprehensively damage variable of rock

Summary

Introduction

Rocks and soils are engineering materials that are widely utilized in geotechnical engineering.Rock heterogeneity and anisotropy makes the investigation of rock constitutive relations complicated and difficult. The study of rock damage constitutive models is more complicated [1,2,3,4,5]. [9] studied the mechanical response of surrounding rock under cyclic loading in a circular tunnel, and a damage constitutive model based on the boundary surface concept was proposed. At time,time, the clarified waterwater was used as the source of the the the water level of the tailings pond changes cyclically varies during a certain time period. In order to water level of the tailings pond changes cyclically varies during a certain time period. In order to observe the rise and fall of the water level, a sonic water level detector was set (Figure 1).

Results

Discussion

Conclusion