PSI - Issue 33

Domenico Ammendolea et al. / Procedia Structural Integrity 33 (2021) 858–870 Domenico Ammendolea et al./ Structural Integrity Procedia 00 (2019) 000 – 000

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5 Conclusion This work presents a novel modeling approach for reproducing crack propagation mechanisms in linear elastic material subjected to thermo-mechanical loadings. The proposed strategy combines a Moving Mesh technique consistent with the Arbitrary Lagrangian-Eulerian formulation (ALE) with the Interaction Integral method ( M integral) in a standard FE framework. The ALE reproduces the geometry evolution of the computational domain because of growing cracks by moving the computational nodes of the mesh frame according to conditions dictated by fracture criteria, thus ensuring reliable results while reducing remeshing actions. The M -integral is formulated in the context of the ALE method, thus extracting SIFs during mesh movement ( i.e. , integrating on deforming elements). The SIFs play a relevant role in the proposed method since are mandatory to define crack onset conditions and the direction of propagation. The proposed strategy is validated using comparisons with numerical data reported in the literature. The results show that the proposed modeling reproduces crack trajectories accurately. Besides, it guarantees rationale predictions of stress intensity factors during mesh movement. Acknowledgements Fabrizio Greco and Paolo Lonetti gratefully acknowledge financial support from the Italian Ministry of Education, University and Research (MIUR) under the P.R.I.N. 2017 National Grant “Multiscale Innovative Materials and Structures” (Project Code 2017J4EAYB; University of Calabria Research Unit). Arturo Pascuzzo gratefully acknowledge financial support from the Italian Ministry of Education, University and Research (MIUR) under the National Grant “PON R&I 2014 -2020, Attraction and International Mobility (AIM) ”, Project n° AIM1810287, University of Calabria”. Domenico Ammendolea gratefully acknowledge financial support from “Programma Operativo Regione (POR) Calabria FESR - FSE 2014/2020”. 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