TY - JOUR
T1 - Understanding the mechanical behavior of fiber/matrix interfaces during push-in tests by means of finite element simulations and a cohesive zone model
AU - Esqué-De Los Ojos, D.
AU - Ghisleni, R.
AU - Battisti, A.
AU - Mohanty, G.
AU - Michler, J.
AU - Sort, J.
AU - Brunner, A. J.
PY - 2016/5/1
Y1 - 2016/5/1
N2 - © 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.
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.
KW - Cohesive zone model
KW - Fiber/matrix adhesion
KW - Fiber/matrix interface
KW - Finite element analysis (FEA)
KW - Mechanical properties
KW - Push-in test
UR - https://www.scopus.com/pages/publications/84959419301
U2 - 10.1016/j.commatsci.2016.02.009
DO - 10.1016/j.commatsci.2016.02.009
M3 - Article
SN - 0927-0256
VL - 117
SP - 330
EP - 337
JO - Computational Materials Science
JF - Computational Materials Science
ER -