coffin-joint
2.The half experiential Coffin Manson equation with material constant C =5 54, β =-1 38 is fitted from the combination of the lifetime measured and the shear plastic strain range simulated by 3D model. The axial strain distribution in solder joint from simulations is coincided very much with the distribution of microstructure coarsening from the cross section inspection.
3.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.
