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论文类型：期刊论文

发表时间：2017-08-01

发表刊物：JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME

收录刊物：SCIE、EI、Scopus

卷号：84

期号：8

ISSN号：0021-8936

关键字：graded lattice structure; topology optimization; additive manufacture; moving morphable components/voids (MMC/MMV)

摘要：In the present work, a new approach for designing graded lattice structures is developed under the moving morphable components/voids (MMC/MMV) topology optimization framework. The essential idea is to make a coordinate perturbation to the topology description functions (TDF) that are employed for the description of component/void geometries in the design domain. Then, the optimal graded structure design can be obtained by optimizing the coefficients in the perturbed basis functions. Our numerical examples show that the proposed approach enables a concurrent optimization of both the primitive cell and the graded material distribution in a straightforward and computationally effective way. Moreover, the proposed approach also shows its potential in finding the optimal configuration of complex graded lattice structures with a very small number of design variables employed under various loading conditions and coordinate systems.