Title:
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Understanding the mechanical behaviour of fiber/matrix interfaces during push-in tests by means of finite element simulations and a cohesive zone model
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Author:
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Esqué-de los Ojos, Daniel; Ghisleni, Rudy; Battisti, Andrea; Mohanty, Gaurav; Michler, Johann; Brunner, Andreas J.; Sort Viñas, Jordi
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Abstract:
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The present work represents a progress towards the understanding of the mechanical behavior of the fiber/matrix interface during push-in tests of fiber-reinforced polymer-matrix composites. Finite element simulations incorporating a cohesive zone model are used for this purpose. Different values of interface strength, interface fracture toughness, fiber diameter and friction coefficient are considered to study how they affect the load-displacement curves. A critical value of the displacement exists, being independent of the fiber diameter for given values of interface strength and fracture toughness, marking the separation between two regimes: (i) a cohesive-dominated zone interaction and (ii) a frictional contact between debonded fiber and matrix. Maps showing the different regimes are constructed, proving their helpfulness to tune the mechanical properties of the interface in order to favor a certain mechanical response. Finally, we study the debonding velocity and how this is affected by the mechanical properties of the interface providing an empirical relation. |
Subject(s):
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-Cohesive zone model -Fiber/matrix adhesion -Finite element analysis (FEA) -Fiber/matrix interface -Mechanical properties -Push-in test |
Rights:
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open access
Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
https://creativecommons.org/licenses/by-nc-nd/3.0/ |
Document type:
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Article |
Published by:
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Uri:
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https://ddd.uab.cat/record/146121
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