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Graded Lattice Structure Density Optimization for Additive Manufacturing

McConaha, Matthew
http://orcid.org/0000-0003-0659-3460
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1523634949822303

Abstract Details

2018, MS, University of Cincinnati, Engineering and Applied Science: Mechanical Engineering.
Additive manufacturing allows for the manufacture of complicated geometric features which are impractical or impossible to manufacture by other means. One of these types of additive manufacturing exclusive geometric features is the collection of intricate and periodic strut-like geometries referred to by the term of lattice structures. Lattice structures are desired for their ability to provide stiffness through the large number of supporting members while employing void space within the geometry as a means of reducing part material volume. Strut thicknesses of every lattice in a part are generally not well optimized in order to maximize part stiffness, and often every lattice unit cell is identical throughout the part. This thesis presents a lattice density optimization methodology based on the widely used SIMP topology optimization which is able to find the optimal strut thickness profile for maximizing part stiffness. The material property interpolation scheme used in SIMP optimization is replaced by a new interpolation scheme which more accurately captures the material properties of the prescribed lattice structure at arbitrary density. The resulting lattice structure maintains the same weight reduction as compared to a SIMP lattice replacement scheme while achieving a lower compliance of the part to applied forces.
Sam Anand, Ph.D. (Committee Chair)
Michael Alexander-Ramos, Ph.D. (Committee Member)
Kumar Vemaganti, Ph.D. (Committee Member)
58 p.
Mechanical Engineering
topology optimization; representative volume element; compliance reduction; lattice structures; additive manufacturing

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Citations

  • McConaha, M. (2018). Graded Lattice Structure Density Optimization for Additive Manufacturing [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1523634949822303

    APA Style (7th edition)

  • McConaha, Matthew. Graded Lattice Structure Density Optimization for Additive Manufacturing. 2018. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1523634949822303.

    MLA Style (8th edition)

  • McConaha, Matthew. "Graded Lattice Structure Density Optimization for Additive Manufacturing." Master's thesis, University of Cincinnati, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1523634949822303

    Chicago Manual of Style (17th edition)

ucin1523634949822303
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This open access ETD is published by University of Cincinnati and OhioLINK.