Topology Optimization for AM A bracket shown below has a load of 1,000 N applied on the two top bolt holes in red on Surface A (500 N on each hole in the negative z direction). Each of the four bolt holes on the bottom plate in blue (Surface B) are fixed. An elastic isotropic material model is adopted with a Young's modulus of 2.3 GPa. The CAD file of the bracket is provided. Perform topology optimization to obtain three different designs as follows: 1. Use a minimum compliance optimization to reduce the mass by 50% without any overhang constraint 2. Use a minimum compliance optimization to reduce the mass by 50% with an overhang constraint of 30 angle 3. Use a minimum compliance optimization to reduce the mass by 50% with an overhang constraint of 45 angle Note: In all the three designs, you must keep at least 2 mm thick of materials around the six bolt holes. In your homework report, comment on how and why the three designs are different. A: Static Structural Static Structural Time: 1. s 1/19/2021 6:50 PM Force: 1000. N B Fixed Support N T 6 B Redesign for AM via Topology Optimization In the previous homework, you came up with several designs for the pillow bracket shown below using topology optimization. As you should have noticed, the final design still is not optimal for printing. The final geometry is typically jagged with small segments that may fail during printing. To print the optimized part, a cleanup is required to successfully print the part. Figure 1: Pillow Bracket The tasks to be carried out for this assignment are given as follows: Task 1: Clean up one of the optimized bracket designs from the previous homework assignment so that it satisfies the DFAM rules for it to print on a desktop FDM printer. These rules should include overhang constraint, print resolution, etc. Note: It may be helpful to run different constraints to visualize designs before completing the cleanup. Task 2: Using an FDM 3D printer such as the Flash Forge Creator Pro 3D printer in SB28 to prepare and print the cleaned optimized bracket design. Task 3: Repeat Task 1 and Task 2 if the design fails to print correctly. Homework Report: Describe the constraints utilized in the topology optimization for the bracket and the DFAM rules that you apply to clean up the geometry. Also, comment on the manufacturability and aesthetics of the printed design compared to the computer design. Use figures and pictures to discuss your findings.