Understanding the mechanical behavior of fiber/matrix interfaces during push-in tests by means of finite element simulations and a cohesive zone model

D. Esqué-De Los Ojos; R. Ghisleni; A. Battisti; G. Mohanty; J. Michler; J. Sort; A. J. Brunner

doi:10.1016/j.commatsci.2016.02.009

Understanding the mechanical behavior of fiber/matrix interfaces during push-in tests by means of finite element simulations and a cohesive zone model

D. Esqué-De Los Ojos, R. Ghisleni, A. Battisti, G. Mohanty, J. Michler, J. Sort, A. J. Brunner

Research output: Contribution to journal › Article › Research › peer-review

13 Citations (Scopus)

Abstract

© 2016 Elsevier B.V. All rights reserved. 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.

Original language	English
Pages (from-to)	330-337
Journal	Computational Materials Science
Volume	117
DOIs	https://doi.org/10.1016/j.commatsci.2016.02.009
Publication status	Published - 1 May 2016

Keywords

Cohesive zone model
Fiber/matrix adhesion
Fiber/matrix interface
Finite element analysis (FEA)
Mechanical properties
Push-in test

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Esqué-De Los Ojos, D., Ghisleni, R., Battisti, A., Mohanty, G., Michler, J., Sort, J., & Brunner, A. J. (2016). Understanding the mechanical behavior of fiber/matrix interfaces during push-in tests by means of finite element simulations and a cohesive zone model. Computational Materials Science, 117, 330-337. https://doi.org/10.1016/j.commatsci.2016.02.009

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Understanding the mechanical behavior of fiber/matrix interfaces during push-in tests by means of finite element simulations and a cohesive zone model. / Esqué-De Los Ojos, D.; Ghisleni, R.; Battisti, A.; Mohanty, G.; Michler, J.; Sort, J.; Brunner, A. J.

In: Computational Materials Science, Vol. 117, 01.05.2016, p. 330-337.

Research output: Contribution to journal › Article › Research › peer-review

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AU - Esqué-De Los Ojos, D.

AU - Ghisleni, R.

AU - Battisti, A.

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AU - Michler, J.

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AU - Brunner, A. J.

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AB - © 2016 Elsevier B.V. All rights reserved. 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.

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