scholarly journals On accuracy estimation of ultrasonic thermometry technique with heated wire method

2018 ◽  
Vol 245 ◽  
pp. 04014 ◽  
Author(s):  
Evgeny Smirnov ◽  
Andrey Yukhnev ◽  
Yakov Gataulin ◽  
Daria Sinitsyna ◽  
Alexander Berkovich ◽  
...  
Keyword(s):  
Temperature Field ◽  
Test Object ◽  
Thermal Strain ◽  
Time Dependent ◽  
Accuracy Estimation ◽  
Heated Wire ◽  
Wire Method ◽  
Using Data ◽  
Tissue Mimicking Material ◽  
Axisymmetric Temperature

A test object with a heated wire introduced into a tissue-mimicking material and a method for determining the coefficient of ultrasonic thermal strain are described. The accuracy of the developed ultrasonic thermometry method is estimated using data of thermistor sensor measurements of time-dependent axisymmetric temperature field around the heated wire.

Dynamic Response of Three-Layered Annular Plates in Time-Dependent Temperature Field

2020 ◽  
Vol 20 (12) ◽  
pp. 2050139
Author(s):  
Dorota Pawlus
Keyword(s):  
Temperature Field ◽  
Dynamic Response ◽  
Thermal Loading ◽  
Dynamic Responses ◽  
Time Dependent ◽  
The Finite Element Method ◽  
Plate Structures ◽  
Buckling Modes ◽  
Annular Plates ◽  
Axisymmetric Temperature

The paper presents a solution to the dynamic response of three-layered, annular plates that are thermo-mechanically loaded. Time-dependent forces are considered to act on the facings of the plate. The thermal loading is defined by a flat, axisymmetric temperature field whose profile is expressed by the stationary or increase in time temperature differences between the plate edges. The cases of the plates loaded only thermally or mechanically have been examined. The problem has been solved analytically and numerically using the approximation methods: orthogonalization and finite difference. The selected reactions of an exemplar plate have been compared with the results obtained for the plate analyzed by the finite element method (FEM). The critical temperature differences and critical loads and corresponding dynamic buckling modes have been analyzed in detail. The numerous results presented for the dynamic responses have an important and practical meaning in the design process of plate structures subjected to complex thermo-mechanical loads.

scholarly journals Erratum to: On accuracy estimation of ultrasonic thermometry technique with heated wire method

2018 ◽  
Vol 245 ◽  
pp. 04018
Author(s):  
Andrey Yukhnev ◽  
Evgueni Smirnov ◽  
Yakov Gataulin ◽  
Daria Sinitsyna ◽  
Alexander Berkovich ◽  
...  
Keyword(s):  
Accuracy Estimation ◽  
Heated Wire ◽  
Wire Method

scholarly journals A Theorem for Finding Maximum Temperature in Wet Grinding

2015 ◽  
Vol 2015 ◽  
pp. 1-13 ◽  
Author(s):  
J. L. González-Santander ◽  
G. Martín
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Temperature Field ◽  
Integral Form ◽  
Stationary Regime ◽  
Time Dependent ◽  
Maximum Temperature ◽  
Theoretical Computation ◽  
Constant Heat ◽  
Workpiece Surface

We consider the solutions found in the literature for heat transfer in surface grinding, assuming a constant heat transfer coefficient for the coolant acting on the workpiece surface and a constant or linear heat flux profiles entering into the workpiece. From the integral form of the time-dependent temperature field reached in the workpiece, assuming the previous conditions, we prove that the maximum temperature always occurs in the stationary regime on the workpiece surface within the contact zone between the wheel and the workpiece. This result assures a very rapid method for the theoretical computation of the maximum temperature.

scholarly journals Calculation of temperature field of coiled wire using EFM

2018 ◽  
Vol 72 ◽  
pp. 03002
Author(s):  
Zhongjun Shu ◽  
Wei Shen ◽  
Qiang Li ◽  
Minghao Fan ◽  
Jiaqing Zhang
Keyword(s):  
Heat Transfer ◽  
Risk Assessment ◽  
Temperature Field ◽  
Fire Risk ◽  
Simulation Method ◽  
Heat Transfer Model ◽  
Numerical Results ◽  
Transfer Model ◽  
Fire Risk Assessment ◽  
Wire Method

Provided a heat transfer model of coiled wire method. Based on the method, a software of EFM (ANSYS) was used to calculate the temperature field of coiled wire. Comparisons between the experimental of RVS coiled wire and numerical results indicated the effectiveness of the method utilized. The simulation method based on EFM proved to be useful for the fire risk assessment of coiled wire.

Simulation of time-dependent movements in Syncrude tailings dyke foundation

1998 ◽  
Vol 35 (2) ◽  
pp. 284-298 ◽  
Author(s):  
AMP Wedage ◽  
N R Morgenstern ◽  
D H Chan
Keyword(s):  
Residual Strength ◽  
Time Dependent ◽  
Deformation Analysis ◽  
Foundation Soil ◽  
Clay Shale ◽  
Soil Plasticity ◽  
Rate Dependent ◽  
Rate Effects ◽  
Clearwater Formation ◽  
Using Data

Foundation movements at the Syncrude tailings dyke continued over several years in response to the construction of the dyke. Major movements have been observed in a relatively narrow layer of previously sheared clay-shale material of the Clearwater Formation. The residual strength of this highly plastic clay increases with the rate of shear. By reviewing the existing literature on the rate effects on residual strength and using data from new experiments on Clearwater Clay Shale, a general correlation between soil plasticity and rate effects is found. This rate dependence of the residual strength of Clearwater clay shale has been incorporated into a deformation analysis, which made it possible to compute time-dependent movements of the foundation soil to a satisfactory level. By using a rate-dependent plasticity model, a prediction of anticipated foundation velocities and how they decrease with time may be achieved.Key words: finite element, rate effects, residual strength, Syncrude tailings dyke, time-dependent movements.

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