scholarly journals Thermomechanical Stress in the Evolution of Shear of Fiber-Matrix Interface Composite Material

2011 ◽  
Vol 02 (05) ◽  
pp. 399-403
Author(s):  
Dalila Remaoun ◽  
Ahmed Boutaous
Keyword(s):  
Composite Material ◽  
Matrix Interface ◽  
Thermomechanical Stress ◽  
Fiber Matrix Interface ◽  
Fiber Matrix

Numerical Test Method for Random Chopped Fiber Composites

2010 ◽  
Author(s):  
Yi Pan ◽  
Assimina A. Pelegri
Keyword(s):  
Composite Material ◽  
Cohesive Zone Model ◽  
Hydrostatic Stress ◽  
Numerical Test ◽  
Test Method ◽  
Zone Model ◽  
Matrix Interface ◽  
Material Constants ◽  
Fiber Matrix Interface ◽  
Fiber Matrix

A two-scale approach for numerical determination of composite material constants using a finite element model is developed. A representative volume element is numerically generated using a modified sequential adsorption algorithm. To determine the strength of the composite material, progressive material degradation models are adopted for the matrix, fiber and the fiber/matrix interface. The epoxy resin is modeled with a modified von Mises criterion in which the effect of hydrostatic stress on yield is accounted for. The resin’s elastic constants degrade with increasing loading application. The glass fiber is modeled as an isotropic material whose failure is governed by the maximum strain criterion. A traction-separation type cohesive zone model is applied at the fiber/matrix interface. Validation of the presented model is achieved by comparing numerical simulations with experimental data. The effective material constants that have been homogenized by the numerical test approach can be applied for future structural analysis.

Simulation by a Genetic Algorithm and Location by the Non-linear Acoustic Technique of the Shear Damage to the Fiber-Matrix Interface of a Hybrid Composite Material Alfa-Carbon / Epoxy

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
B. Doumi ◽  
A. Mokaddem ◽  
N. Benrekaa ◽  
M. Alami ◽  
N. Beldjoudi ◽  
...  
Keyword(s):  
Composite Material ◽  
Hybrid Composite ◽  
Actual Behavior ◽  
Matrix Interface ◽  
Shear Damage ◽  
Acoustic Technique ◽  
Hybrid Composite Material ◽  
Non Linear ◽  
Fiber Matrix Interface ◽  
Fiber Matrix

AbstractThe objective of this paper is to study the location of the shear damage to the fiber matrix interface of a hybrid composite material by using the nonlinear acoustic technique, which is commonly described by the addition of a non-linear term in Hooke’s law. The genetic simulation is based on the probabilistic Weibull model including non-linear parameter β. The results obtained show good agreement between the numerical simulation and the actual behavior of two hybrid composite materials: alfa-carbon/Epoxy and glass-carbon/ Epoxy. In addition the results are similar to those obtained by the analytical model, which based on the Cox and Weibull formalism. The extended study for nanocomposite materials is interesting in the future.

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