Dilation and breakage dissipation of granular soils subjected to monotonic loading
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Dilation and breakage energy dissipation of four different granular soils are investigated by using an energy balance equation. Due to particle breakage, the dilation curve does not necessarily pass through the origin of coordinates. Breakage energy dissipation is found to increase significantly at the initial loading stage and then gradually become stabilised. The incremental dissipation ratio between breakage energy and plastic work exhibits almost independence of the confining pressure. Accordingly, a plastic flow rule considering the effect of particle breakage is suggested. The critical state friction angle is found to be a combination of the basic friction between particles and the friction contributed by particle breakage.
KeywordsDilation Particle breakage Granular soil Energy dissipation
The project was supported by the Fundamental Research Funds for the Central Universities (Grant 106112015CDJXY200008), the National Natural Science Foundation of China (Grant 51509024), and the China Postdoctoral Science Foundation (Grant 2016M590864).
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