Proceedings, EuroSiME Conference, April 2008, Freiburg, Germany.

Effect of Primary Creep Behaviour on Fatigue
Damage Accumulation Rates in Accelerated
Thermal Cycling of Sn3.0Ag0.5Cu Pb-Free

G. Cuddalorepatta and A. Dasgupta
Center for Advanced Life Cycle Engineering (CALCE)
Mechanical Engineering Department
University of Maryland
College Park, MD 20742, USA


• Investigate the level of accuracy with which the measured creep properties predict the stress relaxation response
– constants measured from constant stress loads for predicting varying stress history
– scatter resulting from non-homogeneous and anisotropic microstructure
– combination of experimental shear testing and non-linear finite element simulations

• Understand the effect of the inclusion of primary creep models with secondary creep for thermal cycling response of BGA assemblies

Complete article is available to CALCE Consortium Members.


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