1.Based on the frictional loss in ventilation of extra long highway tunnels and the longitudinal shaft blow-suction,this paper analyzes and calculates how frictional loss affects tunnel projects,proposes some suggestions of various constructional forms and discusses the ventilating project affected by the...
Pressure lossViscoelasticityViscoplasticYield-stress2022We characterise the dynamics and the pressure losses of yield-stress fluid flow through 90° pipe bends using Computational Fluid Dynamics. We show that the bend can influence the flow far upstream and downstream depending on the Bingham number – ...
过滤水头损失water head loss by filtration 冲击水头损失impact loss 最小水头损失minimum head loss 扩大段水头损失head loss due to enlargement 摩阻水头损失frictional head loss 弯管水头损失head loss in bend 河槽摩擦水头损失channel friction head loss ...
50 % or more friction loss can be observed across an archwire [58]. Friction forces that resist sliding depend on the size, shape, material, surface texture of the archwire. The other factors are brackets, ligation of wire in the slot, intraoral factors (such as corrosion, saliva), the...
The reduced bending loss exhibited by the fiber at a bend radius as low as 7.5 mm brings outstanding bend performance to OFS’ industry-leading LaserWave 550/300 fibers. furukawa.co.jp 该光纤所展现出的更低弯曲损耗和低达 7.5 mm 的弯曲半径为 OFS 业内领先的 LaserWave 550/300 光纤带来了出色...
Because this structure shows no enhancement of adhesion under normal indentation by a sphere, it breaks the connection between energy loss during normal and shear loading. This makes it potentially interesting in many applications, for instance in tires, where one wishes to minimize rolling resistance...
The mechanical loss signatures of the transformation twins include relaxation and frequency-independent peaks in the orthorhombic, and tetragonal phases, with no observed energy dissipation in the cubic phase. The macroscopic shape, orientation, and relative displacements of twin walls have been calculated...
The influence of friction stir welding(FSW) process on magnesium alloy's mechanical properties is analyxed through tensile tests and bend tests. 采用不同搅拌摩擦焊工艺焊接镁合金,通过拉伸、三点弯曲试验分析了工艺参数对焊缝机械性能的影响。 3. 6M NaCl solution,by static weight loss experiment(gravime...
It is noted that the energy loss in the form of friction is due to the climbing of surface asperities as they pass over each other. These laws describe the majority of friction behaviors rather well, and the theory was named Coulomb friction, i.e., convex-concave theory. Nevertheless, ...
In the latter case, the projectile asperity is bent again. The energy stored in the bent asperity dissipates as heat into the volume of the jacket material during the dampened oscillatory motion. Exactly this energy loss now corresponds to the frictional heat contribution of a projectile asperity...