Determination of Yield Stress from Initiation of Motion on an Inclined Plane

2000 ◽  
Vol 20 (1) ◽  
pp. 93-114 ◽  
Author(s):  
P.H.T. UHLHERR ◽  
TUNAN FANG ◽  
ZIQIANG ZHOU
Keyword(s):  
Yield Stress ◽  
Inclined Plane

Determination of yield stress fluid behaviour from inclined plane test

1995 ◽  
Vol 34 (6) ◽  
pp. 534-543 ◽  
Author(s):  
Philippe Coussot ◽  
St�phane Boyer
Keyword(s):  
Yield Stress ◽  
Inclined Plane ◽  
Yield Stress Fluid ◽  
Fluid Behaviour ◽  
Inclined Plane Test

Determination of Yield Stress in a Duplex Steel with α + γ Lamellar Structure

2018 ◽  
Vol 50 (1) ◽  
pp. 151-160 ◽  
Author(s):  
Yoon-Uk Heo ◽  
Joo-Hee Kang ◽  
Nam Hoe Heo ◽  
Sung-Joon Kim
Keyword(s):  
Yield Stress ◽  
Lamellar Structure ◽  
Duplex Steel

scholarly journals THE ELASTO-VISCOPLASTIC-TIME-DEPENDENT NATURE OF WAXY CRUDE OILS

2014 ◽  
Vol 13 (2) ◽  
pp. 16
Author(s):  
B. A. Tarcha ◽  
B. P. P. Forte ◽  
E. J. Soares ◽  
R. L. Thompson
Keyword(s):  
Yield Stress ◽  
Crude Oils ◽  
Time Dependency ◽  
Gelation Temperature ◽  
Viscous Effects ◽  
Waxy Crude Oil ◽  
Waxy Crude ◽  
Crucial Feature ◽  
Waxy Crude Oils

Production in reservoirs located in deep and ultra-deep water that contain waxy crude oils faces a huge obstacle imposed by the low temperatures of the environment. When the waxy crude oil is subjected to a temperature below the Gelation Temperature, as in the case investigated in the present work, it exhibits a variety of non-Newtonian features: elasticity, plasticity, viscous effects, and time-dependency, which renders to this material a highly complex behavior. A crucial feature that is frequently ignored when the determination of the yield stress is being carried out is the timedependency nature of these materials. We demonstrate that this character has a significant impact on the measurement of the yield stress and, therefore, values obtained from a protocol that neglects time-dependency can be substantially different from a more careful procedure.

scholarly journals On the Determination of the Yield Surface within the Flow of Yield Stress Fluids using Computational Fluid Dynamics

2018 ◽  
Vol 11 (4) ◽  
pp. 971-982 ◽  
Author(s):  
N. Schaer ◽  
J. Vazquez ◽  
M. Dufresne ◽  
G. Isenmann ◽  
J. Wertel ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Yield Stress ◽  
Yield Surface ◽  
Yield Stress Fluids

Sources of error in yield stress determination of doped crystals

1985 ◽  
Vol 20 (5) ◽  
pp. K50-K51
Author(s):  
M. Hartmanová ◽  
G. A. Andreev
Keyword(s):  
Yield Stress ◽  
Stress Determination ◽  
Sources Of Error

scholarly journals Safety margin against the fatigue fracture under random loading

2018 ◽  
Vol 165 ◽  
pp. 22033 ◽  
Author(s):  
Martin Garan ◽  
Vladimír Chmelko ◽  
Ervin Schafer
Keyword(s):  
Yield Stress ◽  
Fatigue Fracture ◽  
Cross Section ◽  
Material Properties ◽  
Safety Margin ◽  
Time Varying ◽  
Random Loading ◽  
Fatigue Lifetime ◽  
Loading Process

The fatigue lifetime of the structure in operation is express in the number of working cycles, kilometers or time depending units. By harmonic process of loading is possible to express the safety margin as reserve against the required lifetime in the form of number cycles or amplitude of loading. By nonharmonic character of loading process in operation is difficult to express the level of safety margin as the reserve of loading (safety margin in loading). On the case of towing trailer will be discussed more ways of expression the reserve (safety margin) of structure against the fatigue fracture for required fatigue lifetime. For experimental acquired loading process in the most loaded cross-section will be discussed concept of determination of the level safety as reserve in the form of loading parameters. In the case, when the peaks of loading process exceeding the material yield stress (in the most loaded point of the structure) will be discussed concept of expression of loading in the form of time-varying process of strain. By using the cyclic material properties obtained in mode with controlled total strain is possible the safety margin to express also as the multiple of process loading parameters.

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