Print Email Facebook Twitter A cohesive-zone crack healing model for self-healing materials Title A cohesive-zone crack healing model for self-healing materials Author Ponnusami, Sathiskumar A. (University of Oxford) Krishnasamy, J. (TU Delft Aerospace Structures & Computational Mechanics) Turteltaub, S.R. (TU Delft Aerospace Structures & Computational Mechanics) van der Zwaag, S. (TU Delft Novel Aerospace Materials) Date 2018 Abstract A cohesive zone-based constitutive model, originally developed to model fracture, is extended to include a healing variable to simulate crack healing processes and thus recovery of mechanical properties. The proposed cohesive relation is a composite-type material model that accounts for the properties of both the original and the healing material, which are typically different. The constitutive model is designed to capture multiple healing events, which is relevant for self-healing materials that are capable of generating repeated healing. The model can be implemented in a finite element framework through the use of cohesive elements or the extended finite element method (XFEM). The resulting numerical framework is capable of modeling both extrinsic and intrinsic self-healing materials. Salient features of the model are demonstrated through various homogeneous deformations and healing processes followed by applications of the model to a self-healing material system based on embedded healing particles under non-homogeneous deformations. It is shown that the model is suitable for analyzing and optimizing existing self-healing materials or for designing new self-healing materials with improved lifetime characteristics based on multiple healing events. Subject Cohesive-zone modelFracture mechanicsMultiple crack healingSelf-healing material To reference this document use: http://resolver.tudelft.nl/uuid:76b44474-7f77-4701-95f3-e3d25648640b DOI https://doi.org/10.1016/j.ijsolstr.2017.11.004 Embargo date 2018-05-07 ISSN 0020-7683 Source International Journal of Solids and Structures, 134, 249-263 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 © 2018 Sathiskumar A. Ponnusami, J. Krishnasamy, S.R. Turteltaub, S. van der Zwaag Files PDF 1_s2.0_S0020768317305024_main.pdf 7.02 MB Close viewer /islandora/object/uuid:76b44474-7f77-4701-95f3-e3d25648640b/datastream/OBJ/view