Abstract
The foliation structure and spatial variability are important factors affecting the fracture behavior of slate. According to the statistical analysis of mesostructural information, random slate specimens with the foliation structure are physically reconstructed by coupling a one-dimensional random field with a two-dimensional isotropic random field. A cohesion-based numerical method incorporating the foliation structure is developed to simulate the fracture behavior of slate-like materials. The elastic and fracture parameters are evaluated by direct tensile tests, and the numerical model is validated to be self-consistency. It has been confirmed by numerical simulations and tests that the elastic modulus and tensile fracture increase with the foliation angle, and there is a critical foliation angle from the tensile fracture to the shear fracture for the slate under uniaxial tension. Affected by the spatial variability of the foliation structure, slate fractures in the dense and thick area of the foliation plane, and the mechanical properties follow lognormal distribution.
Published Version
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