Browsing by Subject "Topology Optimized Design"
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Item Strength Comparison of Topology Optimized Lattice from Printed SLA Resin, Electroplated Resin and PBF Aluminum Alloy(2022) Wise, Sean; Bobbio, Lourdes; Russo, Analisa; Simpson, Timothy; Beese, Allison M.Given the high cost of metal components made with powder bed fusion (PBF), we compare the strength of two electroplated resin components against monolithic stereolithography (SLA) polymer and BPF aluminum alloy copies of the same geometry. Using Rule of Mixtures (ROM) analysis, validated by ASTM tensile strength measurements, two coating sequences were designed to provide electroplated samples with half the tensile strength and approximately equal tensile strength to PBF AlSi10Mg, respectively. All four sets were subjected to 3-point bending. The monolithic materials had higher proportionate maximum load with respect to tensile strength; however, the electroplated polymer parts displayed enhanced bending response relative to their designed tensile strength. The plated resin part with weaker coating bore 85% of the load of the PBF AlSi10Mg part while the parts with a stronger coating bore almost twice the load of the PBF AlSi10Mg part in a 3-point bend configuration. The enhanced performance may be due to the surface reinforcement from the high strength coating, which better resists bending and buckling in this type of design.