scholarly journals THERMAL DEFLECTION OF THE YANKEE FUEL ASSEMBLY FROM LINEAR AND NON-LINEAR TEMPERATURE GRADIENTS

1959 ◽  
Author(s):  
C.G. Johnson
Keyword(s):  
Fuel Assembly ◽  
Temperature Gradients ◽  
Linear Temperature ◽  
Non Linear ◽  
Thermal Deflection

Bi-Layered Model of Interfacial Thermal Stresses with the Effect of Different Temperatures in the Layers

2011 ◽  
Vol 87 ◽  
pp. 63-70 ◽  
Author(s):  
Sujan Debnath ◽  
Muhammad Ekhlasur Rahman ◽  
Woldemichael Dereje Engida ◽  
M. V. V. Murthy ◽  
K.N. Seetharamu
Keyword(s):  
Thermal Stresses ◽  
Physical Design ◽  
Temperature Gradients ◽  
Interfacial Stress ◽  
Stress Model ◽  
Interfacial Stresses ◽  
Linear Temperature ◽  
Layered Model ◽  
Die Attach ◽  
Different Temperatures

An interfacial shearing and peeling stress model is proposed to account for different uniform temperatures and thickness wise linear temperature gradients in the layers. This upgraded model can be viewed as a more generic form to determine interfacial stresses under different temperature conditions in a bi-layered assembly. The selected shearing and peeling stress results are presented for the case of die and die attach as commonly seen in electronic packaging. The obtained results can be useful in interfacial stress evaluations and physical design of bi-material assemblies, which are used in microelectronics and photonic applications.

Stress Distribution on the Cracked Sandwich Plate with Non Linear Thermal and Moisture Concentration

2021 ◽  
Vol 32 ◽  
pp. 45-62
Author(s):  
Mohamed Khodjet Kesba ◽  
Noureddine El Meiche ◽  
A. Benkhedda
Keyword(s):  
Stress Distribution ◽  
Concentration Distribution ◽  
Sandwich Plate ◽  
Crack Density ◽  
Transverse Cracks ◽  
Linear Distribution ◽  
Moisture Concentration ◽  
Linear Temperature ◽  
Stiffness Reduction ◽  
Non Linear

The influence of linear and non-linear temperature and moisture concentration distribution on the stress distribution was studied for metal/ceramic sandwich plate with transverse cracks. An interlaminar adhesive layer between two different layers is taken into account which transferring the normal stress and the interlaminar shear stress. The validation of the used model was done with the comparison of the stiffness reduction as a function of crack density and the experimental data. A comparison showed that a satisfactory qualitative and quantitative agreement was obtained. The temperature and moisture concentration variation are studied using the linear and non-linear distribution around the cracks to predict the stress distributions along the axis x. Finally, it observed through this study that the variations of the thermal and moisture concentration distribution largely impact the stress distribution for a sandwich plate with transverse cracks in the central layer and also with different mechanical properties of each layers.

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