Prediction of stress-strain relationship with an improved Anand constitutive Model For lead-free solder Sn-3.5Ag |
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Authors: | Xu Chen Gang Chen Sakane M |
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Affiliation: | Sch. of Chem. Eng. & Technol., Tianjin Univ., China; |
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Abstract: | An improved Anand constitutive model is proposed to describe the inelastic deformation of lead-free solder Sn-3.5Ag used in solder joints of microelectronic packaging. The new model accurately predicted the overall trend of steady-state stress-strain behavior of the solder for the temperature range from 233 K to 398 K and the strain rate range from 0.005 s/sup -1/ to 0.1 s/sup -1/. h/sub 0,/ a constant in the original Anand model, was set to a function of temperature and strain rate in the proposed model. Comparison of the experimental results and simulated results verified that the improved Anand model with modifying h/sub 0/ to a function reasonably simulated the inelastic stress-strain relationships. |
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