Numerical Analysis on the Influent Factors of the Interface Stress of 63Sn37Pb under the Temperature Cycle Condition
To study the interface stress of 63Sn37Pb under the temperature cycle condition in the QFP package.Viscoplastic finite element model is established based on the Anand constitutive equation.These factors are discussed in this paper, and these influent factors of the interface stress are between 63Sn37Pb weld spot and backing.The results show that the loading rate have very large effect on the interface stress of the 63Sn37Pb weld spot The greater the rate of temperature load, the greater the stress.The holding rime have a certain effect on it, the longer the holding time and the higher the peak of SEQV.Also the cycle index with the increase of it, the interface stress is enlarged.But the influence to the interface stress is weakened with a gradual increase of the cycle index.
QFP 63Sn37Pb temperature cycles numerical simulation
LI Zhi Dai Hui-tao ZHAO Mci-rong JIN Hai-Jun WU Qiong
Mechanical and Electric Engineering Department,China Three Gorges Project Corporation,Yichang 443002 China Yangtze Power Co.,Ltd,Yichang 443002 College of Mechanical and Material Engineering,China Three Gorges University,Yichang 443002
国际会议
2009 8th International Conference on Reliability,Maintainability and Safety(第八届中国国际可靠性、维修性、安全性会议)
成都
英文
1230-1233
2009-08-24（万方平台首次上网日期，不代表论文的发表时间）