A consideration of the tensile test in this way shows that it is shear stresses which lead to plastic deformation, and for this reason themechanical behaviourexhibited by a material will depend, to some extent, on the type of test applied. For example, aductile materialcan be fractured without...
5. 通常把给定滑移系上开始产生滑移所需分切应力称为 临界分切应力 (critical resolved shear stress)。
Keywords: Order strengthening; Computer simulation; Dislocation glide; Superdislocation; Critical resolved shear stress 1. Introduction Many technically important alloys owe their high mechanical strength to the order strengthening mechanism. An example is the commercial Ni-base superalloy NIMONIC PE16. It...
Taking the dispersive shear stress as an example, it appears in the temporally and horizontally averaged momentum equation as follows:(6)−∂〈p¯〉s∂x+v∂2〈u¯〉s∂y2−∂〈u′v′¯〉s∂y−∂〈u˜v˜〉s∂y−〈∂p˜∂x〉s+v〈∇2u˜〉s=0,...
awhere,A is the hardening modulus matrix and reflects the affect of component A on component A. b is the Bauschinger effect parameter that determines the influence of positive critical resolved shear stress on the negative one. 那里, A是硬化的模数矩阵并且反射组分A影响在组分A。 b是确定正面重要...
shear stress and leads therefore to a large increase in the skin friction, which is supported by the recent research of (Manes et al.2011; Kim et al.2018,2020). Rosti et al. (2018) explored the potential of drag reduction by porous materials. They systematically adjusted the permeability ...
MDR SST variations and coevally occurring changes of vertical wind shear stress dynamics have been successfully identified as the primary TC activity control factors for the short instrumental record8. In addition to the atmospheric modulation in response to the El-Niño-Southern-Oscillation (ENSO),...
Figure S2 shows the time evolution of shear stress and net pressure acting on a cell passing through the pinched flow region in the TR-HS. The flow rate around the cell and the von Mises stress in the cell are also depicted in Fig. S2. The simulation also allowed us to estimate the ...
The rheology of fluid is characterized by the viscosity which is defined as the ratio between shear stress and shear rate. When particles are suspended in fluid, the viscosity of the suspension is often replaced by the effective viscosity. The relative viscosity, μr, is defined as the ratio ...
The second stage can be regarded as a rapid transition from the wave-like structures to the hairpin structures, and the strong shear stress along the direction normal to the wall may be one of the reasons for this to happen, which needs to be verified by additional velocity measurements. ...