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46 SMT Magazine • September 2015 evALuAtING mANuAL AND AutOmAteD HeAt sINK AssembLy continues for the irregular strain graph as observed. The process is different for the automated assembly. Force is applied in a faster and constant rate. The fixture then stops for a few seconds before lifting up the push metal rods. This results to a more stable strain graph, as shown in Figure 5. The differences in the strain rate graph are also evident in Figure 6. FeA (manual Assembly Analysis) Several iterations of the analysis were con- ducted to approximate the manual assembly process. As shown in Figure 7, there are some differences in the strain results when experi- mental data is compared to simulation for the manual process. Varying factors can cause this such as actual material properties, operator ArtiCle figure 4: Max. strain and graph of manual assembly. figure 5: Max. strain and graph of automated assembly. figure 6: Strain rate graph (manual and automated).