期刊
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
卷 394, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cma.2022.114846
关键词
Topology optimization; Phase-field method; Dynamics; Structural optimization; SIMP; Fracture
资金
- China Scholarship Council [201906130024]
This paper proposes a topology optimization framework to improve the dynamic fracture resistance of structures. By combining the phase field method for fracture with Solid Isotropic Material with Penalization (SIMP) topology optimization, the fracture energy is minimized during the entire dynamic loading process, reducing the risk of fracture for the structure.
A topology optimization framework for improving the dynamic fracture resistance of structures is proposed. The phase field method for fracture is combined with Solid Isotropic Material with Penalization (SIMP) topology optimization. The topology optimization problem is defined as minimizing the fracture energy during the whole dynamic loading process, from initiation of cracks to full failure of the structure, under volume and compliance constraints. Semi analytical expressions of sensitivities in a dynamic context are provided to solve the topology optimization problem efficiently. Numerical examples involving structures subjected to impact loading are investigated. It is shown that the present framework allows a significant reduction of the fracture energy as compared to designs obtained by static optimization. (C) 2022 Elsevier B.V. All rights reserved.
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