Question of determining a temperature shear function in the region of linear thermoviscoelasticity

1978 ◽  
Vol 13 (4) ◽  
pp. 607-609 ◽  
Author(s):  
V. N. Efimova ◽  
R. D. Maksimov
Keyword(s):  
Temperature Shear ◽  
Shear Function ◽  
Linear Thermoviscoelasticity

Study on the Calculation Method of Soil-Nailing for High Soil Slope Based on the Logarithmic Spiral Slippery Fracture

2011 ◽  
Vol 261-263 ◽  
pp. 1709-1713
Author(s):  
Meng Yang ◽  
Xiao Min Liu
Keyword(s):  
Mathematical Model ◽  
Stability Analysis ◽  
Engineering Design ◽  
Calculation Method ◽  
Logarithmic Spiral ◽  
Soil Nailing ◽  
Soil Slope ◽  
Mode Pattern ◽  
Shear Function

This paper introduces a new failure mode pattern of soil slope – the logarithmic spiral slippery fracture. A mathematical model for the logarithmic spiral slippery fracture is established, taking the anti-shear function of the soil-nailing into consideration. The shear of soil-nailing, axial force, and the safety coefficients based on the limiting equilibrium method are derived, leading to an accurate stability analysis of the strengthening of soil slope. A case study shows that the anti-shear function of the soil-nailing can be significant and should not be ignored in engineering design.

scholarly journals Performance Testing and Strength Prediction of Ceramic-to-Metal Joints

1993 ◽  
Author(s):  
J. H. Selverian ◽  
Dave A. ONeil ◽  
Shinhoo Kang
Keyword(s):  
Room Temperature ◽  
Performance Testing ◽  
Strength Prediction ◽  
High Temperature Strength ◽  
Torsional Loading ◽  
Element Analysis ◽  
Failure Theory ◽  
Brazed Joints ◽  
Temperature Shear ◽  
Shrink Fit

Brazed joints were made between silicon nitride and Ni-based and Fe-based super alloys. Room temperature shear (torsion) strengths ranged from 75–242 MPa for Si3N4-to-Incoloy 909 joints and from 30–127 MPa for the Si3N4-to-Inconel 718 joints. At 500 °C the joint strength was 120 MPa while at 650°C and 950°C the joints strengths were less than 20 MPa. These low strengths at 650°C and 950°C were attributed to a reduction in the shrink-fit and to low braze strength at these high temperatures. Finite element analysis (FEA) and a probabilistic failure theory (CARES) were used to predict the joint strengths. The predicted joint strengths agreed well with measured joint strengths in torsional loading at 20°C. Torsion tests were also performed at 650°C. Aspects of the material systems, residual stresses, mechanical behavior, and strength predictions are presented. Two new braze alloys based on the Au-Ni-Cr-Fe system were used to overcome the poor high temperature strength. Joints made with these brazes had good strength (85 MPa and 35 N-m) at 650°C.

Rheological behavior of an artificial synovial fluid – influence of temperature, shear rate and pressure

2021 ◽  
Vol 115 ◽  
pp. 104278
Author(s):  
Benedict Rothammer ◽  
Max Marian ◽  
Florian Rummel ◽  
Stefan Schroeder ◽  
Maximilian Uhler ◽  
...  
Keyword(s):  
Shear Rate ◽  
Synovial Fluid ◽  
Rheological Behavior ◽  
Influence Of Temperature ◽  
Temperature Shear

Some Measured Temperature Characteristics in a Two-Dimensional Heated Jet of Air

1976 ◽  
Vol 98 (4) ◽  
pp. 501-505 ◽  
Author(s):  
P. E. Jenkins
Keyword(s):  
Sampling Technique ◽  
Measured Temperature ◽  
Center Line ◽  
Temperature Correlation ◽  
Turbulent Region ◽  
Temperature Excess ◽  
Exit Temperature ◽  
The Mean ◽  
Temperature Shear ◽  
Heated Jet

The mean and conditional temperature and velocity profiles and their correlations were measured in a heated jet of air. The conditional measurements were “zone” averaged measurements, taken only in the fully turbulent region of the flow field by using an electronic sampling technique. The zone averaged measurements were taken of the velocity, temperature, shear stress, and the velocity-temperature correlation at three axial stations: x/D = 35, 45, and 50. The jet Reynolds number (based on the jet slot width) was held constant at 1.43 × 104, with a jet exit temperature excess of θ = 35°C. The conditioned profiles show a large variation from the mean measurements in the fully turbulent region of the jet. The zone averaged measurements approach the mean only as the jet center line and jet interface is approached.

Rheological Properties of Bitumen with Powder Rubber Modifier Obtained by High-Temperature Shear Grinding

2021 ◽  
pp. 475-485
Author(s):  
Victoria Gorbatova ◽  
Irina Gordeeva ◽  
Tatiana Dudareva ◽  
Irina Krasotkina ◽  
Vadim Nikolskii ◽  
...  
Keyword(s):  
High Temperature ◽  
Rheological Properties ◽  
Temperature Shear

Rheological properties of cholesteric liquid crystals as lubricant additives

2019 ◽  
Vol 33 (05) ◽  
pp. 1950014 ◽  
Author(s):  
A. Bindu Madhavi ◽  
S. Sreehari Sastry
Keyword(s):  
Shear Rate ◽  
Rheological Properties ◽  
Loss Modulus ◽  
Flow Behavior ◽  
Lubricant Additives ◽  
Rheological Parameters ◽  
Practical Applications ◽  
Phase Transition Temperatures ◽  
Frequency Independent ◽  
Temperature Shear

Rheological properties of Cholesteryl n-valerate, Cholesteryl decanoate and Cholesteryl myristate which are esters of cholesterol have been studied. Phase transition temperatures and rheological parameters such as viscosity, elastic modulus G[Formula: see text], loss modulus G[Formula: see text] as functions of temperature, shear rate and time are investigated. In frequency sweep test, a higher transition crossover region has occurred for Cholesteryl myristate, whereas for Cholesteryl n-valerate a frequency-independent plateau prevailed for both the moduli. The occurrence of blue phase in Cholesteryl decanoate during temperature sweep measurements is an indication for the rheological support. The results for steady state have informed that cholesteric esters are having non-Newtonian flow behavior in their respective cholesteric phases. The power-law model has explained well the shear rate dependence of shear stress. A few practical applications of these esters as lubricant additives are discussed, too.

Sign in / Sign up

Export Citation Format

Share Document