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통계적 모델 보정을 이용한 솔더 조인트 수명 예측 향상
오현석(Hyunseok Oh),시핑 웨이(Hsiu-Ping Wei),한봉태(Bongtae Han),정병창(Byung C. Jung),한창운(Changwoon Han),윤병동(Byeng D. Youn) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
We propose a novel approach to examine uncertain sources that cause variations in solder joint lifetimes and to predict statistical distributions of solder joint lifetimes under actual operating conditions. The uncertainty in input variables of a life prediction model is propagated to the output. The variations in the output are statistically compared to experimentally-measured lifetimes with censoring data. A set of input variables that minimize the discrepancy between predicted and experimental results is obtained through the optimization technique. The proposed approach is implemented for chip resistor assemblies, and the fatigue life of solder joints under the actual operating conditions is predicted after calibration.