An equation for crack growth rate was derived to consider the trend of stress intensity factor range going down to the threshold and the average stress effect. 首先发展了考虑平均应力影响和低应力强度因子范围趋于门槛值现象的扩展率方程。 更多例句>> 6) horizontal shear stress 水平剪应力 1. ,rel...
Based on the double circular arc (DCA) model and the average shear stress yield (ASSY) criterion for isotropic hardening materials, a new burst pressure equation for corroded pipes is developed in this paper. The ASSY criterion is a weighted average of the maximum shear stress and the ...
In this study surface-averaged and extremal properties of heat transfer and shear stress on the upper wall surface of Rayleigh–Bénard convection are numerically examined. The Prandtl number was raised up to 10 3 , and the Rayleigh number was changed between 10 4 and 10 7 . As a result, ...
Expressions for the mean shear stress and horizontal force components due to local pressure in rough bearings are derived through the definition of shear stress factors, also obtained through simulation. The application of the average Reynolds equation to analyze roughness effects in bearings is ...
where βaph″ is the excess air coefficient at the air preheater outlet, which is calculated using the following equation: (5.77)βaph″=αF″−ΔαF where Δαaph is the air leakage coefficient (air side) of the air preheater, and Iaph0″ and Iaph0′ are theoretical air enthalpy...
Shear velocity (u*) and shear stress (meas) were determined then average values were calculated for each flow condition. The commonly used one-dimensional mean boundary shear stress equation at cross-section was re-arranged according to entropy parameter M and it reflects the real flow condition ...
Based on average shear stress yield (ASSY) criterion, a novel equation is developed to predict the dynamic burst pressure of cylindrical shells. The ASSY criterion is a weighted average of the maximum shear stress and octahedral shear stress. Firstly, the non-uniform impact load is reduced to ...
It is the Reynolds equation incorporating a set of parameters, known as flow factors, which are functions of roughness and film thickness. Flow factors are defined as the pressure flow factor for modifying the pressure-driven flow, or the Poiseuille flow, and the shear flow factor for modifying...
In this paper, an attempt is made to improve Marston's model, in the light of laboratory test data. It is shown that the problem with Marston's equation is its inability to model the shear stress correctly, which leads to an asymptotic vertical stress after a certain depth. The proposed ...
From this new system, we derive the equation for the wall shear stress and the relationship between average pressure gradient, volume flow rate and swirling scalar function over a finite section of the tube. Also, we obtain the corresponding partial differential equation for the swirling scalar ...