Title :
Transient heat conduction analysis of electronic packages by coupled boundary and finite element methods
Author :
Guven, I. ; Madenci, E. ; Chan, C.L.
Author_Institution :
Dept. of Aerosp. & Mech. Eng., Arizona Univ., Tucson, AZ, USA
Abstract :
Electronic packages experience large temperature excursions during their fabrication and under operational conditions. Inherent to electronic packages are the presence of geometric and material discontinuities. The regions where adhesive bond lines intersect with convective heat loss surfaces are the most critical locations for failure initiation due to heat flux singularities and extreme thermo-mechanical stresses. Thus, accurate calculation of the flux field, as well as the temperature field, is essential in transient thermomechanical stress analysis. Although the finite element method (FEM) is highly efficient and commonly used, its application with conventional elements suffers from poor accuracy in the prediction of the flux field in these regions. The accuracy of the results from the boundary element method (BEM) formulation, which requires computationally intensive time-integration schemes, is much higher than that of the FEM. However, in this study, a novel boundary element-finite element coupling algorithm is developed to investigate transient thermal response of electronic packages consisting of dissimilar materials. The new algorithm combines the advantages of both methods while not requiring any iterations along the interfaces between BEM and FEM domains
Keywords :
boundary-elements methods; convection; failure analysis; finite element analysis; heat conduction; packaging; thermal stresses; transient analysis; adhesive bond lines; boundary element method; convective heat loss surfaces; coupling algorithm; electronic packages; failure initiation; finite element method; flux field; heat flux singularities; operational conditions; temperature excursions; temperature field; thermo-mechanical stresses; transient heat conduction analysis; transient thermal response; Bonding; Conducting materials; Electronic packaging thermal management; Electronics packaging; Fabrication; Finite element methods; Temperature; Thermal stresses; Thermomechanical processes; Transient analysis;
Conference_Titel :
Electronic Components & Technology Conference, 1998. 48th IEEE
Print_ISBN :
0-7803-4526-6
DOI :
10.1109/ECTC.1998.678671