Research Article Open Access

Effect of Different Uniform Temperature with Thickness-Wise Linear Temperature Gradient on Interfacial Stresses of a Bi-Material Assembly

D. Sujan1, Z. Oo1, M. V.V. Murthy1 and K. N. Seetharamu1
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American Journal of Applied Sciences
Volume 7 No. 6, 2010, 829-834

DOI: https://doi.org/10.3844/ajassp.2010.829.834

Submitted On: 21 March 2005 Published On: 30 June 2010

How to Cite: Sujan, D., Oo, Z., Murthy, M. V. & Seetharamu, K. N. (2010). Effect of Different Uniform Temperature with Thickness-Wise Linear Temperature Gradient on Interfacial Stresses of a Bi-Material Assembly. American Journal of Applied Sciences, 7(6), 829-834. https://doi.org/10.3844/ajassp.2010.829.834

Abstract

Problem statement: The thermal mismatch induced interfacial stresses are one of the major reliability issues in electronic packaging and composite materials. Consequently an understanding of the nature of the interfacial stresses under different temperature conditions is essential in order to eliminate or reduce the risk of structural and functional failure. Approach: In this analysis, a model was proposed for the shearing and peeling stresses occurring at the interface of two bonded dissimilar materials with the effect of different uniform temperatures in the layers. The model was then upgraded by accounting thickness wise linear temperature gradients in the layers using two temperature drop ratios. The upgraded models were then compared with the existing uniform temperature model. The proposed model can be seen as a more generalized form to predict interfacial stresses at different temperature conditions that may occur in the layers. Results: The results were presented for an electronic bi-material package consisting of die and die-attach. Conclusion: The numerical simulation is in a good matching agreement with analytical results.

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Keywords

  • Shearing stress
  • peeling stress
  • different uniform temperature
  • thickness wise linear temperature gradient