Abstract
The essence of slab track damage under the coupling effect of train load and water is a coupled hydro-mechanical (HM) fracture, and the core technology is the water pressure calculation. Finite element software ANSYS and CFX are used to analyze the water pressure and speed of slab track cracks under high speed train loads. The results show that, the maximum water pressure appears at the crack tip under loading, and decreases along the crack. The value of water pressure is proportional to load amplitude, square of loading frequency and inversely proportional to crack aperture. On the contrary, the maximum water velocity appears at the crack mouth, and increases along the crack. The value of velocity is proportional to load amplitude, proportional to loading frequency, and inversely proportional to crack aperture. The presented theory can be applied to the stress study of slab track water crack.
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