Thermo-Mechanical Properties of Rock Materials

Rock materials exhibit complex interactions between temperature and mechanical stress that govern their deformation, strength and failure behaviours. Thermal effects can induce expansion or contraction, alter microstructure through crack initiation and propagation, and modify mineral cohesion. Concurrently, mechanical loading under varying confining pressures influences thermal damage accumulation and crack coalescence. Understanding these coupled responses is essential for fields such as geothermal energy extraction, underground waste disposal, civil tunnelling and hydrocarbon reservoir stimulation. Recent advances integrate laboratory experiments at elevated temperatures and pressures with numerical models to capture multiphysical processes from grain-scale microcracking to macroscopic fracture networks. Such insights inform the design of engineering interventions and risk assessments in subsurface applications subjected to extreme thermo-mechanical environments.

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Thermo-Mechanical Properties of Rock Materials publication trend

The graph below shows the total number of articles in thermo-mechanical properties of rock materials across all publications each year (not limited to Nature Index journals).

Technical terms

Confining pressure: Pressure applied uniformly around a rock specimen simulating in situ stress conditions.

Thermo-mechanical coupling: Interaction between thermal effects and mechanical behaviour in materials under changing temperature.

Geological Strength Index (GSI): Empirical system for estimating the reduction in strength and deformability of rock masses.

Hoek–Brown criterion: Empirical failure criterion widely used to predict rock mass strength under varying stress conditions.

Finite–Discrete Element Method (FDEM): Numerical technique combining finite element and discrete element approaches to model fracture and deformation.

References

1. Mechanical behavior and constitutive model of shale under real-time high temperature and high stress conditions. Journal of Petroleum Exploration and Production Technology (2022).
2. Study on rock mechanics characteristics of deep shale in Luzhou block and the influence on reservoir fracturing. Energy Science & Engineering (2022).
3. A novel thermo-mechanical coupling approach for thermal fracturing of rocks in the three-dimensional FDEM. Computational Particle Mechanics (2020).