dilatancy การใช้

• Dilatancy is a common feature of the soils and sands.
• C'= is called dilatancy of closely packed soil particles depends on confining pressure.
• These include segregation, stratification, jamming and unjamming, compaction and Reynolds'dilatancy.
• This phenomenon of cracks opening and closing in response to changing stress conditions is called dilatancy.
• If it had originally been in a dense state, then it typically gains volume, a characteristic known as Reynolds'dilatancy.
• Dilatancy in a colloid, or its ability to order in the presence of shear forces is dependent on the ratio of interparticle forces.
• Not recognizing the significance of dilatancy, Coulomb proposed that the shear strength of soil may be expressed as a combination of adhesion and friction components:
• This effect, as well as other possible precursors, has been attributed to dilatancy, where rock stressed to near its breaking point expands ( dilates ) slightly.
• From the triaxial test data, it is possible to extract fundamental material parameters about the sample, including its angle of shearing resistance, apparent cohesion, and dilatancy angle.
• One, called dilatancy theory, he said, is similar to what happens when people go out on a beach and step in wet sand and the sand gets dry around their feet.
• 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.
• 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.
• 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.
• 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.
• 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.