TY - EJOU AU - Chen, Lianxiong AU - Liu, Hui AU - Chu, Xihua AU - Wang, Jiao TI - Functionally Graded Cellular Structure Design Using the Subdomain Level Set Method with Local Volume Constraints T2 - Computer Modeling in Engineering \& Sciences PY - 2021 VL - 128 IS - 3 SN - 1526-1506 AB - Functional graded cellular structure (FGCS) usually shows superior mechanical behavior with low density and high stiffness. With the development of additive manufacturing, functional graded cellular structure gains its popularity in industries. In this paper, a novel approach for designing functionally graded cellular structure is proposed based on a subdomain parameterized level set method (PLSM) under local volume constraints (LVC). In this method, a subdomain level set function is defined, parameterized and updated on each subdomain independently making the proposed approach much faster and more cost-effective. Additionally, the microstructures on arbitrary two adjacent subdomains can be connected perfectly without any additional constraint. Furthermore, the local volume constraint for each subdomain is applied by virtue of the augmented Lagrange multiplier method. Finally, several numerical examples are given to verify the correctness and effectiveness of the proposed approach in designing the functionally graded cellular structure. From the optimized results, it is also found that the number of local volume constraints has little influence on the convergence speed of the developed approach. KW - Multiscale design; hierarchical structure; functionally graded cellular structure; local volume constraints; topology optimization DO - 10.32604/cmes.2021.016894