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Design Optimization of Irregular Cellular Structure for Additive Manufacturing

Chinese Journal of Mechanical Engineering 2017年第5期30卷 1184-1192页

作者： Guo-Hua Song Shi-Kai Jing Fang-Lei Zhao Ye-Dong Wang Hao Xing Jing-Tao Zhou School of Mechanical Engineering Beijing Institute of Technology Key Lab of Contemporary Design and Integrated Manufacturing Technology Ministry of EducationNorthwestern Polytechnical University

Irregularcellular structurehas great potential to be considered in light-weight design field. However, the research on optimizing irregular cellular structures has not yet been reporteddue to the difficulties in their modeling technology. Based on the variable density topology opti- mization theory, an efficient method for optimizing the topology of irregular cellular structures fabricated through additive manufacturing processes is proposed. The pro- posed method utilizes tangent circles to automatically generate the main outline of irregular cellular structure. The topological layoutof each cellstructure is optimized using the relative density informationobtained from the proposed modified SIMP method. A mapping relationship between cell structure and relative densityelement is builtto determine the diameter of each cell structure. The results show that the irregular cellular structure can be optimized with the proposed method. The results of simulation and experimental test are similar for irregular cellular structure, which indicate that the maximum deformation value obtained using the modified Solid Isotropic Microstructures with Penalization （SIMP） approach is lower 5.4× 10-5 mm than that using the SIMP approach under the same under the same external load. The proposed research provides the instruction to design the other irregular cellular structure.

关键词： Irregular cellular structure Additivemanufacturing Topology optimization relative densitymapping

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