基于SPH的花岗岩高精度建模方法及矿物尺度裂纹扩展规律研究

doi:10.3724/1000-6915.jrme.2025.0857

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Abstract The key to accurately predicting the macro-mechanical behavior of rock materials lies in a profound understanding of the evolution laws and mechanisms governing microcracks at the mineral scale. This paper proposes a high-precision multi-scale modeling framework that integrates advanced X-ray computed tomography (CT) technology, nanoindentation techniques, and the Smoothed Particle Hydrodynamics (SPH) numerical method. Utilizing this modeling framework, an SPH-GBM numerical model that accurately represents the spatial distribution of mineral crystals (quartz, feldspar, and mica) and grain boundaries within granite was successfully developed. The simulation results indicate that the failure of granite under uniaxial loading is primarily driven by tensile damage. Microcracks initially emerge as tensile intragranular cracks at grain boundaries, where stress concentrations are likely to occur. As the load increases, these cracks propagate and converge along the grain boundaries and subsequently penetrate the interior of the crystals, forming grain boundary cracks. The crack propagation path exhibits distinct mineral selectivity, with microcracks preferentially forming within feldspar, followed by quartz, while mica particles, which possess the lowest stiffness, tend to fracture near peak strength. This study confirms that SPH-GBM is a robust tool for linking high-precision microstructural characteristics with macroscopic failure behavior in rocks, offering significant potential for advancing research in rock mesomechanics.

Key words： rock mechanics mineral-scale SPH high-precision modeling methods uniaxial compression test crack propagation

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	Articles by authors
	ZHOU Yu1
	2
	3
	ZHONG Lulu1
	YU Shuyang4*
	LIANG Qinyuan5
	LYU Wenjun6
	HAN Guansheng1
	2
	TANG Qiongqiong1
	2
	LI Bo7
	WU Faquan1
	2
	3

Cite this article:

ZHOU Yu1,2,3, et al. Crack propagation law at the mineral scale of granite based on the high-precision modeling approach using SPH[J]. , 2026, 45(10): 3016-3030.

URL:

https://rockmech.whrsm.ac.cn/EN/10.3724/1000-6915.jrme.2025.0857 OR https://rockmech.whrsm.ac.cn/EN/Y2026/V45/I10/3016

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