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Design of Variable-Density Structures for Additive Manufacturing Using Gyroid Lattices

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2018, MS, University of Cincinnati, Engineering and Applied Science: Mechanical Engineering.
Additive manufacturing (AM) processes enable the creation of structures having complex geometry. Among such structures are lattice structures which offer great potential for designing lightweight structures. The combination of AM and cellular lattice structures provide promising design solutions in terms of material usage, cost and part weight. However, the geometric complexity of the structures calls for a robust methodology to incorporate the lattices in parts designs and create optimum lightweight designs. This thesis proposes a novel method for designing lightweight variable-density lattice structures using gyroids. The parametric 3D implicit function of gyroids has been used to control the shape and volume fraction of the lattice. The proposed method is then combined with the density distribution information from topology optimization algorithm. A density mapping and interpolation approach is proposed to map the output of topology optimization into the parametric gyroids structures which results in an optimum light-weight lattice structure with uniformly varying densities across the design space. The proposed methodology has been validated with two test cases.
Sam Anand, Ph.D. (Committee Chair)
Michael Alexander-Ramos, Ph.D. (Committee Member)
Kumar Vemaganti, Ph.D. (Committee Member)
38 p.

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Citations

  • Zhang, B. (2018). Design of Variable-Density Structures for Additive Manufacturing Using Gyroid Lattices [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535374427634743

    APA Style (7th edition)

  • Zhang, Botao. Design of Variable-Density Structures for Additive Manufacturing Using Gyroid Lattices. 2018. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535374427634743.

    MLA Style (8th edition)

  • Zhang, Botao. "Design of Variable-Density Structures for Additive Manufacturing Using Gyroid Lattices." Master's thesis, University of Cincinnati, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535374427634743

    Chicago Manual of Style (17th edition)