Leonov viscoelastic constitutive model and its application in simple shear flow were described. The model can describe various flows perfectly, including shear flow, oscillation flow and transient shear flow.

Six characteristic parameters, consisting of transient shear strain γ 1 after loading, transient recovery shear strain γ 2 after unloading, total shear strain γ 3 during the period of loading, residual shear strain γ 4 after unloading, time t 1 of loading and time t 2 between the initial unloading and the steady state after unloading, were put forward on the basis of analysis of different kinds of rheological curves.

In this paper, the transient shear stress of two kinds of non-Newtonian fluids is analysed, and the relationship between sliding speed and shear stress is mainly described.

The results from transient shear measurements such as flow reverse and start-up flow showed that the ruptured network structure could reorganize,which was indicated by the appearance of stress overshoot during quiescent annealing process.

Solutions are presented for transient shear flows.

Transient shear flow of fluids with deformable microstructure

Specific calculation schemes are developed for transient shear and/or electric fields.

A significant portion of the shear stress was directed in ther-direction during start-up, and therefore the full Navier-Stokes equation was necessary to accurately describe the transient shear stress.

Transient shear deformation at interfaces of laminated beams

In this paper, the transient shear stress of two kinds of non-Newtonian fluids is analysed, and the relationship between sliding speed and shear stress is mainly described.

本文分析了两种非牛顿流体模型的瞬态剪应力,着重论述了滑动速度与剪应力的关系.

Traditional static shear tests were revised so as to study the rheological behavior of semisolid A356 alloy with different microstructure morphology. Six characteristic parameters, consisting of transient shear strain γ 1 after loading, transient recovery shear strain γ 2 after unloading, total shear strain γ 3 during the period of loading, residual shear strain γ 4 after unloading, time t 1 of loading and time t 2 between the initial unloading and the steady state after unloading,...

Traditional static shear tests were revised so as to study the rheological behavior of semisolid A356 alloy with different microstructure morphology. Six characteristic parameters, consisting of transient shear strain γ 1 after loading, transient recovery shear strain γ 2 after unloading, total shear strain γ 3 during the period of loading, residual shear strain γ 4 after unloading, time t 1 of loading and time t 2 between the initial unloading and the steady state after unloading, were put forward on the basis of analysis of different kinds of rheological curves. The relations of characteristic parameters to shear stress, morphology of primary α phases, as well as solid fraction were obtained by regression analysis, so that the rheological behavior of semisolid A356 alloy can be evaluated systematically.

On the basis of the large-scale shaking table 1∶10 scale model test,the dynamic property of foundation in unfreedom ground of liquefaction is studied.In ground of liquefaction,compared to freedom foundation,the self-vibration frequency of unfreedom foundation obviously increases,yet its property of dynamic energy dissipation improves a little.Before liquefaction of soil and in input of a small shake,the dynamic deformation of foundation mainly appears linear characteristics,which primarily exhibits in the amplification...

On the basis of the large-scale shaking table 1∶10 scale model test,the dynamic property of foundation in unfreedom ground of liquefaction is studied.In ground of liquefaction,compared to freedom foundation,the self-vibration frequency of unfreedom foundation obviously increases,yet its property of dynamic energy dissipation improves a little.Before liquefaction of soil and in input of a small shake,the dynamic deformation of foundation mainly appears linear characteristics,which primarily exhibits in the amplification effect to earthquake waves,the response of acceleration gradually strengthens from bottom to top.After soil liquefied entirely,the response of foundation acceleration also gradually strengthens from bottom to top,which is that the shear movement between layers of liquefied foundation is accelerated and the increased speed of the shear movement is gradually accelerated from bottom to top.The variation of pore pressure in foundation is psimarily affected by following two factors: the first is that with depth decreasing, the pore pressure will decrease while the pore pressure ratio will increase; the second is that the smaller the distance to a pile,the bigger the pore pressure and pore pressure ratio.Before soil liquefied,and when the primary peak of inputted waves has gone,the dissipation of pore pressure becomes gradually slower from bottom to top.While inputting a bigger shake,the pore pressure is in the tendency of lowing from bottom to top,but the peak pore pressure ratio all arrives at the liquefaction pore pressure ratio,and when the primary peak of inputted waves has gone,the pore pressure dissipates very slowly,particularly the dissipation of pore pressure becomes slower and slower with the decrease of depth.In this test, it is occurred that an interesting phenomena of transient minus pore pressure is perhaps attributed to the transient shear swell effect of liquefaction soil.