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Acta Mechanica Sinica

, Volume 34, Issue 1, pp 175–186 | Cite as

Macro and micro mechanics behavior of granite after heat treatment by cluster model in particle flow code

Research Paper

Abstract

In this paper, a cluster model in particle flow code was used to simulate granite specimens after heat treatment under uniaxial compression. The results demonstrated that micro-cracks are randomly distributed in the specimen when the temperature is below 300 \({^{\circ }}\)C, and have partial coalescence when the temperature is up to 450 \({^{\circ }}\)C, then form macro-cracks when the temperature is above 600 \({^{\circ }}\)C. There is more inter-granular cracking than intra-granular cracking, and their ratio increases with increasing temperature. The micro-cracks are almost constant when the temperature decreases from 900 \({^{\circ }}\)C to room temperature, except for quartz \(\alpha \)\(\beta \) phase transition temperature (573 \({^{\circ }}\)C). The fracture evolution process is obviously affected by these cracks, especially at 600–900 \({^{\circ }}\)C. Elevated temperature leads to easily developed displacement between the grains, and the capacity to store strain energy becomes weaker, corresponding to the plasticity of granite after heat treatment.

Keywords

Cluster model Granite Thermal damage Micro-crack Energy 

Notes

Acknowledgements

The project was supported by the National Natural Science Foundation of Jiangsu Province of China for Distinguished Young Scholars (Grant BK20150005) and the Fundamental Research Funds for the Central Universities (China University of Mining and Technology) (Grant 2014XT03). We also would like to express our sincere gratitude to the editor and two reviewers for their valuable comments, which have greatly improved this paper.

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Copyright information

© The Chinese Society of Theoretical and Applied Mechanics; Institute of Mechanics, Chinese Academy of Sciences and Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  1. 1.State Key Laboratory for Geomechanics and Deep Underground EngineeringChina University of Mining and TechnologyXuzhouChina

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