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Mohamed Bentoumi

Mohamed Bentoumi
Optical institute and precision mechanics · CIVIL ENGINEERING

Doctor of Engineering

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15
Publications
2,534
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54
Citations

Publications

Publications (15)
Article
Full-text available
The resistance to separation of the concrete from its reinforcing steel with which it is in contact is called adhesion .This adhesion constitutes an important property for the use of reinforced concrete. That is why many techniques were developed with the aim of determining this property. Adhesion can be easily found out by standard pullout test ma...
Article
Instrumented indentation testing is widely used to determine the mechanical properties of materials. In particular, this technique makes it possible to study brittle materials for which cracks can be generated around the impression during the indentation test. Cracking can result in the formation of pop-ins on the curve load-segment which can be us...
Article
Full-text available
The effect of organic solvents on the transport process and mechanical properties in elastomeric nanocomposite materials is reported. The investigated samples are formed by a semicrystalline ethylene-co-butyl acrylate (EBA) polymer filled with hard spherical carbon black (CB) nanoparticles. The swelling behavior was studied at room temperature by i...
Article
Cracking resistance or fracture toughness of brittle materials, such as optical glasses, can be determined by Vickers indentation, which allows generating cracks along the diagonals of the indent whose length depends of the loading rate. Subsequently, a relationship between the crack length and the corresponding indentation load is applied to calcu...
Conference Paper
Full-text available
The pellets polishing is used to finish different type of brittles materials (glass and ceramic glass). Improved surfaces are obtained via this technique. In this paper, we present a methodology allowing producing a surface roughness lower than 8 nm. In addition, the toughness of brittle materials is estimated in pellets polishing. For that, the in...
Article
Full-text available
This work presents a study of crack propagation with a new 2D finite element method with the stretching of the mesh. This method affects at each propagation step new coordinates of each element node of the mesh. The structure is divided to areas and each area has its own coordinate formulas. A program in FORTRAN allows us to create a parametric mes...
Article
Full-text available
In this work, nano, micro, and macro-indentation tests under standard or multicycle loading conditions were performed for studying the mechanical behavior of a crown borosilicate glass sample with the objective to study the scale effect in indentation and the influence of cracks formation on the assessment of mechanical properties. When no cracks w...
Conference Paper
Full-text available
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Conference Paper
Full-text available
CHARACTERIZATION OF MATERILAS PROPERTIES NANOCOMPOSITES
Article
Numerous methods have been proposed to estimate the indentation fracture toughness Kic for brittle materials. These methods generally uses formulæ established from empirical correlations between critical applied force, or average crack length, and classical fracture mechanics tests. This study compares several models of fracture toughness calculati...
Article
Comparative study by indentation test of the mechanical characteristics of sodalimeand ceramic glasses ground and polished by bound abrasive grains. In this work, indentation toughness of 4 optical glasses (Crown K5, Heavy flint, Float glass and Zerodur r) was analyzed regarding its surface quality. Despite the large number of the involved technolo...

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