Manufacturability of Optimized Lattice
Altair EmployeeHello,
I am working on a project where lattice optimization will be performed on a part that will eventually be printed using additive manufacturing. From what I understand, after performing a topology optimization using optistruct, the elements with a density between UB and LB will be converted into lattice structure. Based on some trial analysis, it appears that each element is converted into it's own lattice 'unit cell'. For a fine mesh this presents a problem as the lattice structure will be too small to print. Is there any way to continue using a fine mesh for accuracy but to have a larger lattice created?
I can also use a larger mesh, but with the complex geometry I suspect the optimization will be significantly less accurate.
Answers
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Hi,
It would be very helpful if post a image of the current lattice results.
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Hello @Prakash Pagadala,
Here are some photos from my initial optimization. Since this was only a test run I did not include a minimum radius for the lattice. Hopefully these photos clarify my original question, you can now see the mesh as well as the resultant geometry.
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<?xml version="1.0" encoding="UTF-8"?>
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Hi,
In Lattice parameters, can you set POROSITY to LOW and check if this helps?
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Hello Prakash,
I will try that later today but as far as I understand, POROSITY has no effect on the lattice shape or size. POROSITY only effects the penalization of the elements with intermediate densities. Setting POROSITY to LOW will simply mean that some of the elements with intermediate densities will be converted to solid instead of lattice.
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