2026-04-13T03:04:10Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/228762024-06-14T08:54:02Zcom_2072_452955com_2072_2054col_2072_453061

An efficient ERR-Cohesive method for the modelling of delamination propagation with large elements Daniel, Pierre M. Främby, Johannes Fagerström, Martin Maimí Vert, Pere Materials compostos -- Deslaminatge Composite materials -- Delamination Mecànica de fractura Fracture mechanics Resistència de materials Strength of materials The accurate modelling of delamination propagation is necessary to numerically assess the behaviour of layered materials during failure. Many available methods present computational limitations for large structures. Conventional cohesive zone modelling implies using a fine mesh, typically smaller than 1.0 mm, since several elements are needed inside the fracture process zone. This article presents an ERR-Cohesive method to model delamination in elements larger than the fracture process zone. The crack propagation is determined with an estimation of the energy release rate by means of the virtual crack closure technique. To progressively open the crack along the element length, a nodal cohesive law is introduced. The novel cohesive formulation allows to smoothly release the interface while dissipating the appropriate amount of energy. Accurate results have been obtained in double cantilever beam, end-notched flexure and mixed-mode bending tests with regular and irregular meshes for element lengths from 2 mm to 8 mm The financial support of the Agencia de Suport a l’Empresa Catalana (ACCIÓ) through the grant ACE034/21/000015 is acknowledged. M. Fagerström and J. Främby gratefully acknowledge the financial support through Vinnova’s strategic innovation programme LIGHTer, Sweden (LIGHTer Academy grant no. 2020-04526). Open Access funding provided thanks to the CRUE-CSIC agreement with Elsevier 2023-04 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion peer-reviewed http://hdl.handle.net/10256/22876 http://hdl.handle.net/10256/22876 eng info:eu-repo/semantics/altIdentifier/doi/10.1016/j.compositesa.2022.107423 info:eu-repo/semantics/altIdentifier/issn/1359-835X info:eu-repo/semantics/altIdentifier/eissn/1878-5840 Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess application/pdf Elsevier Composites Part A: Applied Science and Manufacturing, 2023, vol. 167, art.núm. 107423 Articles publicats (D-EMCI)