A Non-Ersatz Material Approach for the Topology Optimization of Elastic Structures Based on Piecewise Constant Level Set Method. Commun. Comput. Phys. [Internet]. 2021 Oct. 26 [cited 2025 Dec. 5];30(5):1370-89. Available from: https://global-sci.com/index.php/cicp/article/view/7014