But aside from Haicheng, which was based on anecdotal reports, dilatancy has never been observed before an earthquake, Jordan said, and it was later shown that the idea would not work.
12.
The relationship between dilation and internal friction is typically illustrated by the "'sawtooth model "'of dilatancy where the angle of dilation is analogous to the angle made by the teeth to the horizontal.
13.
Boundary conditions are often well defined in other branches of civil engineering, but unlike steel or concrete, the material properties and behavior of soil are difficult to predict due to its variability and limitation on strength, stiffness, and dilatancy ( volume change associated with application of shear stress ), making studying soil mechanics all the more difficult.
14.
The OCR is significant for two reasons : firstly, because the compressibility of normally consolidated soil is significantly larger than that for overconsolidated soil, and secondly, the shear behavior and dilatancy of clayey soil are related to the OCR through critical state soil mechanics; highly overconsolidated clayey soils are dilatant, while normally consolidated soils tend to be contractive.
15.
According to this theory, in the source a series accommodation processes which allow medium " to adapt ( to any limen ) " to increasing loads and in which such specific properties of block mediums, as ability to repacking, to quasiplastic flow, to dilatant strengthening, and also the phenomenon of dynamic convertibility of dilatancy, leading to formation of mesostrictures in source earthquake areas are awakely displayed educes.
