Print Email Facebook Twitter A crack-tip element for modelling arbitrary crack propagations Title A crack-tip element for modelling arbitrary crack propagations Author Fu, Qiang (Dalian University of Technology) Yi, Sinan (Beijing Institute of Mechanical and Electrical Engineering) Chen, B. Y. (TU Delft Aerospace Structures & Computational Mechanics) Bui, Tinh Quoc (Duy Tan University; Tokyo Institute of Technology) Hu, Xiaofei (Dalian University of Technology) Yao, Weian (Dalian University of Technology) Date 2020 Abstract Numerical study on crack propagation are of great importance for structure design and assessment. In this contribution, the floating node method (FNM) is combined with the symplectic analytical singular element (SASE) to form a new crack-tip element. The four node quadrilateral crack-tip element contains a SASE for the crack tip area to account for the singularity issue. Floating nodes are used to form a smooth transition mesh to full fill the other area of the element automatically once the SASE has been generated. Delaunay triangulation is used to guarantee the quality of the transition elements. Strong discontinuity resulted from complex crack networks with multiple cracks is treated by the FNM. Criteria for crack nucleation, propagation angle and length of new crack segment are given. Interaction between cracks and between crack and defect can be readily modelled without any prior knowledge of crack path. The fracture process of crack propagation can be modelled without remeshing. Inherited from the FNM, the proposed crack-tip element is especially suitable to be implemented in the form of a user defined element. Completed fracture processes with crack nucleation, propagation and interaction are modelled in the numerical examples. Subject Crack propagationFloating node methodSASEStress intensity factor To reference this document use: http://resolver.tudelft.nl/uuid:e47db711-ede0-44e4-9839-53aca6ddddd3 DOI https://doi.org/10.1016/j.tafmec.2019.102422 Embargo date 2021-12-03 ISSN 0167-8442 Source Theoretical and Applied Fracture Mechanics, 105 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2020 Qiang Fu, Sinan Yi, B. Y. Chen, Tinh Quoc Bui, Xiaofei Hu, Weian Yao Files PDF 1_s2.0_S0167844219305245_main.pdf 9.44 MB Close viewer /islandora/object/uuid:e47db711-ede0-44e4-9839-53aca6ddddd3/datastream/OBJ/view