A Damage Constitutive Model for a Rock under Compression after Freeze-Thaw Cycles Based on the Micromechanics

Figure 1

The microcrack propagation model under the frost heaving pressure. and are the length and width of the microcrack, respectively. and are the propagation length of the microcrack along two directions, respectively. is the length of the plastic zone near the microcrack tip. is the equivalent propagation length of the microcrack.