المؤلفون: Boubir, Badreddine¹ (AUTHOR) b.boubir@crti.dz

المصدر: Optical & Quantum Electronics. Jun2024, Vol. 56 Issue 6, p1-28. 28p.

مصطلحات موضوعية: *NONLINEAR Schrodinger equation, *ELECTROMAGNETIC wave propagation, *WAVEGUIDES, *INTEGRATED optics, *SOLITONS, *OPTICAL modulators

مستخلص: In this paper, we explore new optical solitons for the coupled nonlinear Schrödinger equation with generalized anti-cubic nonlinearity, which governs the propagation of electromagnetic waves in magneto-optic waveguides. These components play a crucial role in optical transmission lines and lasers, being utilized in integrated optical circuits as modulators, circulators, and isolators. To retrieve optical soliton solutions, we have implemented, for the first time, two powerful schemes for the model equation, namely the modified Sardar sub-equation method and the new Φ6-model expansion method. As a result, we obtained a wide variety of new soliton solutions, including bright, dark, gray, dark bell-type, kink, anti-kink, singular, mixed bright-singular, and dark-singular solitons. Additionally, various other solution forms emerged, such as Jacobi elliptic functions, periodic, and rational solutions. Finally, by extracting parametric conditions for the existence of soliton solutions, we discovered that physical parameters, including inter-modal dispersions, self-steepening effect, nonlinear dispersion, and the magneto-optic effect, play a crucial role in both the existence and shaping of the extracted solitons. [ABSTRACT FROM AUTHOR]

المؤلفون: Gaagaia, Djamel Edinne, Boutasseta, Nadir, Belkaid, Khmissi, Boubir, Badreddine, Aouaichia, Hamza, Guettaf, Tahar Temam, Yaklef, Youssouf

المصدر: International Journal of Engineering Research in Africa; May 2024, Vol. 69 Issue: 1 p19-28, 10p

مستخلص: The objective of this work is to carry out a comparison of different materials in the form of a bidirectional carbon fabric and hybrid Kevlar and glass as reinforcements in an epoxy matrix with a loading rate of 30wt%. Two experimental tests have been carried out in order to determine the mechanical properties, such as tensile and Brinell hardness tests. In the case of tensile and Brinell hardness tests, the characterization was performed on two types of composite plates reinforced with Woven Carbon Fiber and Hybrid Woven Kevlar and E-Glass with Epoxy (WCF-HWKG/EPOXY) and Hybrid Woven Kevlar and E-Glass with Epoxy (HWKG/EPOXY). Consequently, it has been observed that the tensile and hardness properties of the hybrid composite material (HWKG/EPOXY) are respectively 36% and 46.43% lower compared to (WCF-HWKG/EPOXY). Based on these findings, the studied materials demonstrate potential applications across various fields, including aeronautics, aerospace, and high-performance automotive sectors.

المؤلفون: Belkaid, Khmissi, Boutasseta, Nadir, Aouaichia, Hamza, Gaagaia, Djamel Eddine, Deliou, Adel, Boubir, Badreddine

المصدر: Frattura ed Integrità Strutturale; Vol. 16 No. 61 (2022): July 2022; 372-393 ; Frattura ed Integrità Strutturale; V. 16 N. 61 (2022): July 2022; 372-393 ; 1971-8993

مصطلحات موضوعية: Third Order Shear Deformation Theory, Sandwich Composite Plates, Finite Element, Bending Behavior, Numerical simulation, Finite element method, composite structure

الوصف: In this paper, a C0 simple and efficient isoparametric eight-node displacement-model based on higher order shear deformation theory is proposed for the bending behavior study of multilayer composites sandwich plates. Difficult C1-continuity requirement is overcome by extracting the seven degrees of freedom from strain relations for each element node: two displacements for in-plane behavior and five bending unknowns namely: a transverse displacement, two rotations and two shear angles, which results in a kinematic approximation formulation having only first order derivative requirement. The governing equations of the element (constitutive, virtual work and equilibrium equations) are implemented for the prediction of approximate solutions of deflections and stresses of sandwich plates linear elastic problems. Thereby, the formulation element is able to present a cubic in-plane displacement along both core and faces sandwich thickness, as well as, the shear stresses are found to vary as quadratic field without requiring shear correction factors and independent from any transverse shear locking problems. The accuracy and validity of the proposed formulation is verified through the numerical evaluation of displacements and stresses and their comparison with the available analytical 3D elasticity solutions and other published finite element results.

وصف الملف: application/pdf

العلاقة: https://www.fracturae.com/index.php/fis/article/view/3527/3622Test; https://www.fracturae.com/index.php/fis/article/view/3527/3603Test; https://www.fracturae.com/index.php/fis/article/view/3527Test

الإتاحة: https://doi.org/10.3221/IGF-ESIS.61.25Test
https://www.fracturae.com/index.php/fis/article/view/3527Test

المؤلفون: Boubir, Badreddine

المصدر: Communications in Nonlinear Science and Numerical Simulation ; volume 59, page 216-221 ; ISSN 1007-5704

مصطلحات موضوعية: Applied Mathematics, Modeling and Simulation, Numerical Analysis

الإتاحة: https://doi.org/10.1016/j.cnsns.2017.11.023Test
https://api.elsevier.com/content/article/PII:S1007570417304100?httpAccept=text/xmlTest
https://api.elsevier.com/content/article/PII:S1007570417304100?httpAccept=text/plainTest

المؤلفون: Boubir, Badreddine

المصدر: Optik ; volume 143, page 2-6 ; ISSN 0030-4026

مصطلحات موضوعية: Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials

الإتاحة: https://doi.org/10.1016/j.ijleo.2017.06.063Test
https://api.elsevier.com/content/article/PII:S0030402617307325?httpAccept=text/xmlTest
https://api.elsevier.com/content/article/PII:S0030402617307325?httpAccept=text/plainTest

المؤلفون: Adouane, Azzedine, Djabi, Smail, Boubir, Badreddine

المصدر: Optik ; volume 127, issue 24, page 11627-11635 ; ISSN 0030-4026

مصطلحات موضوعية: Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials

الإتاحة: https://doi.org/10.1016/j.ijleo.2016.09.088Test
https://api.elsevier.com/content/article/PII:S003040261631107X?httpAccept=text/xmlTest
https://api.elsevier.com/content/article/PII:S003040261631107X?httpAccept=text/plainTest