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- W4281661762 abstract "Abstract In this work, an object‐oriented geometric engine is proposed to solve problems with discontinuities, for instance, material interfaces and cracks, by means of unfitted, immersed, or enriched finite element methods (FEMs). Both explicit and implicit representations, such as geometric entities and level sets, are introduced to describe configurations of discontinuities. The geometric engine is designed in an object‐oriented way and consists of several modules. For efficiency, a ‐d tree data structure that partitions the background mesh is constructed for detecting cut elements whose neighbors are found by means of a dual graph structure. Moreover, the implementation for creating enriched nodes, integration elements, and physical groups is described in detail, and the corresponding pseudo‐code is also provided. The complexity and efficiency of the geometric engine are investigated by solving 2‐D and 3‐D discontinuous models. The capability of the geometric engine is demonstrated on several numerical examples. Topology optimization and problems with intersecting discontinuities are handled with enriched FEMs, where enriched discretizations obtained from the geometric engine are used for the analysis. Furthermore, polycrystalline structures that overlap with an unfitted mesh are considered, where integration elements are created so they align with grain boundaries. Another example shows that the Stanford bunny, which is discretized by a surface mesh with triangular elements, can be fully immersed into a 3‐D background mesh. Finally, we share a list of main findings and conclude that the proposed geometric engine is general, robust, and efficient." @default.
- W4281661762 created "2022-06-13" @default.
- W4281661762 creator A5000258153 @default.
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- W4281661762 date "2022-08-19" @default.
- W4281661762 modified "2023-09-26" @default.
- W4281661762 title "An object‐oriented geometric engine design for discontinuities in unfitted/immersed/enriched finite element methods" @default.
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