Quasi-static thermal stresses due to a concentrated moving heat source in a thin plate

2016 ◽  
Vol 22 (2) ◽  
pp. 243-256
Author(s):  
Amir Reza Shahani ◽  
Samad Kalani
Keyword(s):  
Thermal Stress ◽  
Stress Field ◽  
Heat Source ◽  
Thin Plate ◽  
Thermal Stresses ◽  
Static Solution ◽  
Stress Distributions ◽  
Moving Heat Source ◽  
Displacement Potential ◽  
Thermal Stress Field

Temperature and thermal stress distributions in a two-dimensional infinite thin plate subjected to a moving heat source with variable power and velocity are obtained by solving quasi-static thermoelasticity equations analytically with the aid of a thermoelastic displacement potential. The results show good agreement with experimental data for a stationary source with constant power and with a steady-state analytical solution in the open literature. It is shown that the quasi-static solution can predict changes of the thermal stress field during the movement of the heat source, and can give the effect of changes of power and velocity of the heat source on the thermal stress field during its movement.

Unsteady thermal stress analysis in three-dimensional problems by means of the thermoelastic displacement potential and the boundary element method

1990 ◽  
Vol 25 (1) ◽  
pp. 9-14 ◽  
Author(s):  
Y Ochiai ◽  
R Ishida ◽  
T Sekiya
Keyword(s):  
Thermal Stress ◽  
Boundary Element Method ◽  
Boundary Element ◽  
Thermal Stresses ◽  
Three Dimensional ◽  
Stress Distributions ◽  
Displacement Potential ◽  
Thermal Displacements ◽  
Thermoelastic Displacement ◽  
Element Method

A numerical method to analyse unsteady thermal stresses in three-dimensional problems is proposed. It is shown that three-dimensional unsteady thermal stress problems can be easily solved without the volume integral by means of the thermoelastic displacement potential and the boundary element method. It is also shown that the time integral can be easily carried out analytically. In order to investigate the accuracy of this method, unsteady thermal stress distributions for a sphere and a circular cylinder are obtained. As a numerical example for which it is difficult to obtain the analytical solution, thermal displacements and surface stress distributions for a torus are obtained.

Numerical Simulation on Stress Field in Inside-Beam Laser Cladding

2014 ◽  
Vol 887-888 ◽  
pp. 1309-1312
Author(s):  
Ming Di Wang ◽  
Xiao Ling Hang ◽  
Kai Bo Guo ◽  
Shi Hong Shi ◽  
Lin Ning Sun
Keyword(s):  
Temperature Field ◽  
Thermal Stress ◽  
Stress Field ◽  
Heat Source ◽  
High Energy ◽  
Field Change ◽  
Change Over Time ◽  
Thermal Stress Field ◽  
Advanced Analysis ◽  
Over Time

In the process of deposition, the moving high energy heat source effect on the metal entity, and form the molten pool and the temperature field of directional conduction. Powder is accumulated in the substrate point by point, molten powder instantly solidify into a solid which is combined with substrate (or sediment) to reach metallurgical combination, from the perspective of the thermodynamic, the temperature field produced by coupling ring of heat source is regarded as a moving load to the base plate and the sedimentary section, and transient thermal stress field is generated, the load and boundary conditions (temperature field) of thermal stress field change over time, at the same time, the solution domain of thermal stress field change over time as a result. Therefore, through the life and death unit technology (ANSYS finite element analysis software of advanced analysis techniques) combined with the circulation order, the simulation of point to add deposition process is realized.

Analysis of Thermal Stresses and Residual Stress Changes in Railroad Wheels Caused by Severe Drag Braking

1977 ◽  
Vol 99 (1) ◽  
pp. 18-23 ◽  
Author(s):  
M. R. Johnson ◽  
R. E. Welch ◽  
K. S. Yeung
Keyword(s):  
Residual Stress ◽  
Stress Field ◽  
Yield Point ◽  
Thermal Stresses ◽  
Material Behavior ◽  
Nonlinear Material ◽  
Residual Stress Field ◽  
Thermal Stress Field ◽  
Stress Changes ◽  
Railroad Wheels

A finite-element computer program, which takes into consideration nonlinear material behavior after the yield point has been exceeded, has been used to analyze the thermal stresses in railroad freight car wheels subjected to severe drag brake heating. The analysis has been used with typical wheel material properties and wheel configurations to determine the thermal stress field and the extent of regions in the wheel where the yield point is exceeded. The resulting changes in the residual stress field after the wheel has cooled to ambient temperature have also been calculated. It is shown that severe drag braking can lead to the development of residual circumferential tensile stresses in the rim and radial compressive stresses in the plate near both the hub and rim fillets.

scholarly journals Thermal Stresses in Porous Materials under Thermal Shock by Cooling Medium-Infiltration Effect on Thermal Stress Distributions-

2004 ◽  
Vol 112 (1303) ◽  
pp. 172-178 ◽  
Author(s):  
Hiroaki TANAKA ◽  
Yuji MAKI ◽  
Kazuki TSUBOI ◽  
Sawao HONDA ◽  
Tadahiro NISHIKAWA ◽  
...  
Keyword(s):  
Thermal Stress ◽  
Porous Materials ◽  
Thermal Shock ◽  
Thermal Stresses ◽  
Stress Distributions ◽  
Cooling Medium

Effects of Scanning Patterns on the Thermal/Stress Field during Laser Solid Forming T-Shape Chord of Ti-6Al-4V Alloy

2014 ◽  
Vol 41 (7) ◽  
pp. 0703003
Author(s):  
姜亚琼 Jiang Yaqiong ◽  
林鑫 Lin Xin ◽  
马良 Ma Liang ◽  
谭华 Tan Hua ◽  
杨海欧 Yang Haiou ◽  
...  
Keyword(s):  
Thermal Stress ◽  
Stress Field ◽  
Laser Solid Forming ◽  
Thermal Stress Field

Calculation and Analysis of 2-D Thermal Stress Field in Induction Motor with Compound Cage Rotor under Different Load

2011 ◽  
Vol 117-119 ◽  
pp. 97-100
Author(s):  
Jun Ci Cao ◽  
Rong Chao Qian ◽  
Wei Li Li
Keyword(s):  
Finite Element ◽  
Thermal Stress ◽  
Stress Field ◽  
Induction Motor ◽  
Reference Value ◽  
Single Site ◽  
Compound Material ◽  
Thermal Stress Field ◽  
New Type ◽  
Cage Rotor

3kW two poles induction motor with compound cage rotor is illustrated in this paper, and 2-D thermal stress field of induction motor rotor is calculated and analyzed by finite element. Contrasting with common induction motor, induction motor with compound cage rotor has specific rotor shot shape and the bar is comprised of the upper compound material and the lower cast aluminium, which cause distribution of thermal stress is special. The motor with the rotor shot of compound material laid at single site is chosen to analyzing. The maximum thermal stress in the bar is calculated at different load, and the distribution of thermal stress in the bar is analyzed at rate load. The law of distribution of thermal stress in the bar has same reference value for designing new type of induction motor.

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