Stress-dilatancy for crushed latite basalt

In this article, the stress-dilatancy relationship for crushed latite basalt is analysed by using Frictional State Theory. The relationship is bilinear, and the parameters α and β determine these two straight lines. At the initial stage of shearing, the mean normal stress increment mainly influences breakage, but at the advanced stage, it is shear deformation that influences breakage. At the advanced stage of shearing, the parameter α_pt represents energy consumption because of breakage and β_pt mainly represents changes in volume caused by breakage during shear. It is also shown that breakage effect is significant at small stress levels and the η-D^p plane is important to fully understand the stress-strain behaviour of crushed latite basalt in triaxial compression tests.