An X-FEM Based Approach for Topology Optimization of Continuum Structures
In this study, extended finite element (X-FEM) is implemented to represent topology optimization of continuum structures in a fixed grid design domain. An evolutionary optimization algorithm is used to gradually remove inefficient material from the design space during the optimization process. In the case of 2D problems, evolution of the design boundary which is supper-imposed on the fixed grid finite element framework is captured using isolines of structural performance. The proposed method does not need any remeshing approach as the X-FEM scheme can approximate the contribution of boundary elements in the finite element frame work of the problem. Therefore the converged solutions come up with clear and smooth boundaries which need no further interpretation. This approach is then extended to 3D by using a 3D X-FEM scheme implemented on isosurface topology design.
KeywordsTopology Optimization X-FEM Isoline Isosurface Evolutionary
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