PWSCC growth analyses by boundary element method considering weld residual stress distributions

2018 ◽  
Vol 168 ◽  
pp. 156-165 ◽  
Author(s):  
Yong Min Lee ◽  
Jae Min Sim ◽  
Yoon-Suk Chang ◽  
In-Hwan Shin ◽  
Jun-Seog Yang
Keyword(s):  
Residual Stress ◽  
Boundary Element Method ◽  
Boundary Element ◽  
Stress Distributions ◽  
Weld Residual Stress ◽  
Growth Analyses ◽  
Element Method

scholarly journals Fatigue Life Prediction of the Zirconia Fixture Based on Boundary Element Method

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Y. W. Wang ◽  
J. J. Ye ◽  
W. P. He ◽  
G. G. Cai ◽  
B. Q. Shi
Keyword(s):  
Fatigue Life ◽  
Boundary Element Method ◽  
Boundary Element ◽  
Crack Growth ◽  
Semiconductor Industry ◽  
Element Model ◽  
Stress Distributions ◽  
Paris Law ◽  
Initial Cracks ◽  
Element Method

Zirconia grinding fixtures have been widely used in semiconductor industry to improve the quality and precision of the products. For maximizing the service life and minimizing the risks of accidental damage, it is critical to have a better understanding of the fatigue life of zirconia grinding fixtures. To this end, a boundary element method is developed in this paper to investigate their crack growth and fatigue life. To validate the proposed method, the stress intensity factor of a typical plate structure with initial cracks is considered. On this basis, Paris Law is employed in the boundary element model to further study the crack growth and stress distributions in the zirconia fixture under cyclic loads. Numerical results show that stress concentration occurs at the pillar of the fixture, and crack growth is perpendicular to the loading direction.

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.

A BOUNDARY-ELEMENT METHOD FOR ATOMIZATION OF A FINITE LIQUID JET

1995 ◽  
Vol 5 (6) ◽  
pp. 621-638 ◽  
Author(s):  
J. H. Hilbing ◽  
Stephen D. Heister ◽  
C. A. Spangler
Keyword(s):  
Boundary Element Method ◽  
Boundary Element ◽  
Liquid Jet ◽  
Element Method
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