Issue 52

R. Hadj Boulenouar et alii, Frattura ed Integrità Strutturale, 52 (2020) 128-136; DOI: 10.3221/IGF-ESIS.52.11 128 Three-dimensional numerical analysis of a joint bonded reinforced with silica nanoparticles (SiO 2 ) Hadj Boulenouar Rachid, Boutabout Benali Laboratory of Mechanics Physics of Materials (LMPM), Djillali Liabes University, Department of Mechanical Engineering, Sidi Bel Abbes, Algeria r.hadjboulenouar@gmail.com, bboutabout@yahoo.fr Djebbar Noureddine Laboratory of Mechanics Physics of Materials (LMPM), Hassiba Benbouali University, Department of Mechanical Engineering, Chlef, Algeria. djebbarnour@yahoo.fr , https://orcid.org/0000-0002-6496-7996 A BSTRACT . Nanostructured adhesives may be defined as those materials whose elements imbedded in an epoxy matrix have dimensions in the 1 to 100 nm range. One of the most interesting aspects of ceramic nanoparticles is that their mechanical properties depend strongly upon the particle size and shape. Silica nanoparticles (SiO 2 ) have different physical and mechanical properties from bulk ceramics. The aim of the present study is to investigate the effect of the nanoparticles rate on the equivalent stress, peeling stress and shear stress as well as the strains developed in the adhesive joint. Three-dimensional finite element models of adhesive joint were developed to determine the stress intensity as well as strain with different nanoparticles rate in the epoxy resin. Dispersion of nanoparticles with different percent in the epoxy resin allows for reinforcing the adhesive. Polymer embedded silica nanoparticles (SiO 2 ) proved to be highly effective. K EYWORDS . Epoxy, Finite Element Method, Silica Nanoparticles SiO 2 , Stress, Strain. Citation: Hadj Boulenouar, R., Boutabout, B., Djebbar, N., Three-dimensional numerical analysis of a joint bonded reinforced with silica nanoparticles (SiO 2 ), Frattura ed Integrità Strutturale, 52 (2020) 128-136. Received: 09.11.2019 Accepted: 02.01.2020 Published: 01.04.2020 Copyright: © 2020 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. I NTRODUCTION here is an increasing interest in polymer/silica nanocomposites for the developments of new materials with improved thermal and mechanical properties [1-3]. Polymer nanocomposites are among the most promising materials. The incorporation of a small fraction of nanoparticles into a polymer matrix not only leads to dramatically reinforced mechanical properties [4], but also endows the material with flame-retardant [5, 6], conductivity [7, 8], gas-barrier [9], and optical properties [10, 11], among others. However, these enhanced properties depend strongly on nanoparticle dispersion and the interfacial interactions between the nanoparticles and the polymer matrices [12-15]. Polymers are used for high-technology application areas such as coatings, electrical appliances, adhesives, automotive and aerospace industries T