PREDICTION, BY A GENETIC ALGORITHM, OF THE EFFECT OF HEAT STRESS ON THE TRANSVERSE DAMAGE OF FIBER-MATRIX INTERFACE OF HYBRID COMPOSITE MATERIAL (GLASS-CARBON/ EPOXY)

2016 ◽  
Vol 7 (1) ◽  
pp. 31-43
Author(s):  
M. Morsli ◽  
A. Mokaddem ◽  
B. Doumi ◽  
L. Temimi ◽  
A. Boutaous ◽  
...  
Keyword(s):  
Genetic Algorithm ◽  
Composite Material ◽  
Heat Stress ◽  
Hybrid Composite ◽  
Matrix Interface ◽  
Hybrid Composite Material ◽  
Glass Carbon ◽  
Fiber Matrix Interface ◽  
Fiber Matrix ◽  
Transverse Damage

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.

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.

Using Genetic Algorithm for Investigating the Performance of Carbon-Basalt / Polyester Hybrids Composite Materials

2020 ◽  
Vol 13 ◽  
Author(s):  
Mohammed Belkheir ◽  
Bendouma Doumi ◽  
Allel Mokaddem ◽  
Ahmed Boutaous
Keyword(s):  
Genetic Algorithm ◽  
Composite Materials ◽  
Cox Model ◽  
Probabilistic Approach ◽  
Matrix Interface ◽  
Interface Shear ◽  
Polyester Composite ◽  
Fiber Matrix Interface ◽  
Fiber Matrix ◽  
Hybrid Carbon

Background:: The composite materials are more efficient and more resistant compared to so-called traditional materials. The application of continuous and variable forces modifies the properties of the materials, and generates the formation of cracks which lead to the rupture of structures. Objective:: The objective of this work is to study the reliability and the origin of the resistance of each fiber-matrix interface of the two hybrid composite materials studied. Methods:: In this study, the genetic algorithm is based on Weibull's probabilistic approach to calculate the damage to the interface and also on the Cox model to find and initialize the different values used in simulation model. Results:: The results obtained, by genetic modeling, have showed that the hybrid Carbon High Modulus (HM) / Basalt / Polyester composite is the most resistant to the mechanical stresses applied comparing with that of Carbon High Strength (HS) / Basalt / Polyester, these results were confirmed by the level of damage to the interface found for the two materials studied, and that the interface shear damage of the hybrid Carbon HM / Basalt / Polyester composite is much lower by 13% compared to that of Carbon HS / Basalt / Polyester. Conclusion:: The calculations are in good agreement with the analytical results of Cox, where he demonstrated that the Young's modulus of the fibers has an important influence on the shear strength of the fiber / matrix interface of composite materials.

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