2026-04-04T00:34:45Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/250712024-10-29T20:29:19Zcom_2072_452955com_2072_2054col_2072_453061

00925njm 22002777a 4500 dc Cózar, Ivan R. author Maimí Vert, Pere author González Juan, Emilio Vicente author Camanho, Pedro Manuel Ponces Rodrigues de Castro author Otero, Fermin author 2024-07-26 A novel 3D viscoelastic–viscoplastic and viscodamage constitutive model is proposed to predict the viscous effects due to dynamic loading conditions of unidirectional carbon fibre-reinforced polymer laminates at the meso-scale level. The present model is developed under continuum damage mechanics and the thermodynamics of irreversible processes framework. The viscoelastic response is modelled using the generalised Maxwell model, while an overstress model is employed to address the viscoplastic strain. The onset of the viscodamage mechanisms is based on experimental expressions, and their propagation is defined as a function of the corresponding fracture toughness. The mechanical response of the present constitutive model under pure longitudinal shear loading conditions at different strain rates is presented. The higher the strain rate is, the stiffer the responses in the viscoelastic and viscoplastic regions are. Additionally, the onset of viscodamage increases with higher strain rates. Off-axis compressive experimental data at two different strain rates are employed to demonstrate the capabilities of the present model with good predictions being obtained The first author would like to acknowledge the support of the Catalan Government (Agència de Gestió d’Ajuts Universitaris i de Recerca) through Grant 2019FI_B_01117. The present research project has received funding from the Clean Sky 2 Joint Undertaking (JU) under grant agreements No. 886519 (BEDYN). The JU receives support from the European Union’s Horizon 2020 Research and Innovation programme and the Clean Sky 2 JU members other than the Union. The authors would also like to express special thanks to the Topic Managers of said European project for their support in the development of the work presented: Dassault Aviation. Grant PID2022-137979OB-I00 funded by MICIU/AEI/10.13039/501100011033 and by FEDER-European Union Open Access funding provided thanks to the CRUE-CSIC agreement with Elsevier http://hdl.handle.net/10256/25071 Elements finits, Mètode dels Finite element method Plàstics reforçats amb fibra -- Propietats mecàniques Fiber-reinforced plastics -- Mechanical properties Viscoelasticitat Viscoelasticity Viscoplasticitat Viscoplasticity A three-dimensional viscoelastic–viscoplastic and viscodamage constitutive model for unidirectional fibre-reinforced polymer laminates