Nonlinear dynamic analysis of surface mount interconnects: Part II—Applications

Using the unified constitutive model and the finite element procedure presented in Part I (the preceding paper), a material nonlinear time domain dynamic analysis of a solder joint was studied for low cycle and high cycle fatigue. Thermal effects were not included in order to understand the dynamic behavior of a Pb40/Sn60 solder joint without noise-effects from thermal behavior. The latter decision was a result of observations reported in Steinberg (1988), that having in-phase or out-of-phase thermal loading in conjunction with vibrations makes a significant difference in the fatigue life. The study of fatigue under concurrent loading will be the subject of another paper.