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Crack propagation and deviation in bi-materials under thermo-mechanical loading
Chama, Mourad,Boutabout, Benali,Lousdad, Abdelkader,Bensmain, Wafa,Bouiadjra, Bel Abbes Bachir Techno-Press 2014 Structural Engineering and Mechanics, An Int'l Jou Vol.50 No.4
This paper presents a finite element based numerical model to solve two dimensional bi-material problems. A bi-material beam consisting of two phase materials ceramic and metal is modelled by finite element method. The beam is subjected simultaneously to mechanical and thermal loadings. The main objective of this study is the analysis of crack deviation located in the brittle material near the interface. The effect of temperature gradient, the residual stresses and applied loads on crack initiation, propagation and deviation are examined and highlighted.
Evaluation of energy release rate of composites laminated with finite element method
Habib Achache,Benali Boutabout,Abdelouahab Benzerdjeb,Djamel Ouinas 국제구조공학회 2015 Structural Engineering and Mechanics, An Int'l Jou Vol.55 No.1
Control of the mechanical behavior of composite materials and structures under monotonic and dynamic loads for cracks and damage is a vast and complex area of research. The modeling of the different physical phenomena and behavior characteristics of a composite material during deformation play an important role in the structural design. Our study aims to analyze numerically the energy release rate parameter G of a composite laminated plate (glass or boron / epoxy) cross-ply [+α, −α] in the presence of a crack between two circular notches under the effect of several parameters such as fiber orientation α, the crack orientation β, the orientation γ of the two considered circular notches and the effect of mechanical properties. Our results show clearly that both notches orientation has more effect on G than the cracks and fibers orientations.
Crack propagation and deviation in bi-materials under thermo-mechanical loading
Mourad Chama,Benali Boutabout,Abdelkader Lousdad,Wafa Bensmain,Bel Abbes Bachir Bouiadjra 국제구조공학회 2014 Structural Engineering and Mechanics, An Int'l Jou Vol.50 No.4
This paper presents a finite element based numerical model to solve two dimensional bi-material problems. A bi-material beam consisting of two phase materials ceramic and metal is modelled by finite element method. The beam is subjected simultaneously to mechanical and thermal loadings. The mainobjective of this study is the analysis of crack deviation located in the brittle material near the interface. The effect of temperature gradient, the residual stresses and applied loads on crack initiation, propagation and deviation are examined and highlighted.
Delamination of a composite laminated under monotonic loading
Habib Achache,Abdelouahab Benzerdjeb,Abdelkader Mehidi,Benali Boutabout,Djamel Ouinas 국제구조공학회 2017 Structural Engineering and Mechanics, An Int'l Jou Vol.63 No.5
Our work aims to analyze using the finite element method the evolution of the stress intensity factor (SIF) parameter K of three laminated folded plates stacks [+a,-a], made of the same epoxy matrix and different reinforcement fibers (boron, graphite and glass). Our results show that the angle of orientation of the boron/epoxy composite has no great influence on the variation of the parameter KI. Compared to composite graphite/epoxy and glass/epoxy, the laminated composite boron/epoxy reduces more the SIF KI in the middle of the plate for angles 0 <= a <= 30.
Delamination of a composite laminated under monotonic loading
Achache, Habib,Benzerdjeb, Abdelouahab,Mehidi, Abdelkader,Boutabout, Benali,Ouinas, Djamel Techno-Press 2017 Structural Engineering and Mechanics, An Int'l Jou Vol.63 No.5
Our work aims to analyze using the finite element method the evolution of the stress intensity factor (SIF) parameter K of three laminated folded plates stacks [$+{\alpha}$, $-{\alpha}$], made of the same epoxy matrix and different reinforcement fibers (boron, graphite and glass). Our results show that the angle of orientation of the boron/epoxy composite has no great influence on the variation of the parameter KI. Compared to composite graphite/epoxy and glass/epoxy, the laminated composite boron/epoxy reduces more the SIF KI in the middle of the plate for angles $0^{\circ}{\leq}{\alpha}{\leq}30^{\circ}$.