Development and application of a binary medium bond contact model for calcareous sands
Qifen Cheng, Ge Zhang
TL;DR
This paper introduces a new model to study the mechanical behavior of calcareous sands used in South China Sea island construction.
Contribution
A binary media bonding contact model is developed to simulate the progressive failure of calcareous sands.
Findings
The model accurately reflects the mechanical properties of calcareous sand through numerical simulations.
Stress-strain curves from simulations align well with experimental results.
Damage parameters significantly affect stress-strain curves and shear strength.
Abstract
In the construction process of islands and reefs in the South China Sea, calcareous sand, as an important foundation and building material, has been widely used in engineering practice. It is crucial to explore the mechanical properties of calcareous sands to ensure the stability and maintenance of these islands and reefs. To study the effects of the bonding progressive failure on its macroscopic mechanical properties, a binary media bonding contact model is developed. This model can describe the gradual deterioration process of the intergranular cementation. Additionally, a discrete elemental contact subroutine (DLL) is created by C++ language program for the particle flow program (PFC2D) to utilize. The compression and direct shear testing of single contact was subjected. The computational accuracy of the proposed binary media contact model was confirmed by the comparison of the…
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Taxonomy
TopicsGeotechnical Engineering and Soil Mechanics · Rock Mechanics and Modeling · Geotechnical Engineering and Soil Stabilization