Using ANSYS performed the nonlinear finite element analysis of the QFP solder joints under thermal cycles. The thermal fatigue life of QFP solder joint was calculated using Coffin-Manson equation based on the plastic strain.

• 对热循环加载条件下QFP焊点进行了非线性有限元分析,基于塑性应变采用Coffin-Manson方程计算了25种不同焊点形态的QFP焊点热疲劳寿命;