Topology optimization for additive manufacturing has been limited to the design of single-piece components that fit within the printer's build volume. This paper presents a gradient-based multicomponent topology optimization method for structures assembled from components built by powder bed additive manufacturing (MTO-A), which enables the design of multipiece assemblies larger than the printer's build volume. Constraints on component geometry for powder bed additive manufacturing are incorporated in a density-based topology optimization framework, with an additional design field governing the component partitioning. For each component, constraints on the maximum allowable build volume (i.e., length, width, and height) and the elimination of enclosed cavities are imposed during the simultaneous optimization of the overall topology and component partitioning. Numerical results of the minimum compliance designs revealed that manufacturing constraints, previously applied to single-piece topology optimization, can unlock richer design exploration space when applied to multicomponent designs.
Multicomponent Topology Optimization for Additive Manufacturing With Build Volume and Cavity Free Constraints
Ann Arbor, MI 48105;
Nagakute 480-1192, Japan
Contributed by the Computers and Information Division of ASME for publication in the JOURNAL OF COMPUTING AND INFORMATION SCIENCE IN ENGINEERING. Manuscript received July 31, 2018; final manuscript received January 21, 2019; published online March 6, 2019. Assoc. Editor: Yong Chen.
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Zhou, Y., Nomura, T., and Saitou, K. (March 6, 2019). "Multicomponent Topology Optimization for Additive Manufacturing With Build Volume and Cavity Free Constraints." ASME. J. Comput. Inf. Sci. Eng. June 2019; 19(2): 021011. https://doi.org/10.1115/1.4042640
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