Publications Internationales

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Subject: search.filters.subject.Shear stress

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Now showing 1 - 7 of 7
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    Investigation of the behavior of an RC beam strengthened by external bonding of a porous P-FGM and E-FGM plate in terms of interface stresses
    (Techno Press, 2023) Sadoun, Zahira; Bennai, Riadh; Nebab, Mokhtar; Dahmane, Mouloud; Atmane, Hassen Ait
    During the design phase, it is crucial to determine the interface stresses between the reinforcing plate and the concrete base in order to predict plate end separation failures. In this work, a simple theoretical study of interface shear stresses in beams reinforced with P-FGM and E-FGM plates subjected to an arbitrarily positioned point load, or two symmetrical point loads, was presented using the linear elastic theory. The presence of pores in the reinforcing plate distributed in several forms was also taken into account. For this purpose, we analyze the effects of porosity and its distribution shape on the interracial normal and shear stresses of an FGM beam reinforced with an FRP plate under different types of load. Comparisons of the proposed model with existing analytical solutions in the literature confirm the feasibility and accuracy of this new approach. The influence of different parameters on the interfacial behavior of reinforced concrete beams reinforced with functionally graded porous plates is further examined in this parametric study using the proposed model. From the results obtained in this study, we can say that interface stress is significantly affected by several factors, including the pores present in the reinforcing plate and their distribution shape. Additionally, we can conclude from this study that reinforcement systems with composite plates are very effective in improving the flexural response of reinforced RC beams.
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    Rheological behavior of Algerian crude oil: effect of temperature and refined product
    (Taylor and Francis Online, 2018) Souas, Farid; Safri, Abdelhamid; Benmounah, Abdelbaki; Djemiat, Djamal Eddine
    The rheological behavior and its variation with temperature and refined product concentration of a crude oil sample coming from a quagmire of the separation station of Tin Fouye Tabankort oilfield/southern Algeria were investigated experimentally. The experiments were carried out at various temperatures (20, 30 and 50 °C) over the shear rate range of 0 to 700 s−1 by using a controlled stress rheometer (AR 2000, TA Instrument). The results showed that the crude oil exhibit non-Newtonian of shear thinning behavior at low shear rate and Newtonian behavior at high shear rate and was adequately described by Casson and Herschel–Bulkley models. The rheological measurements through the steady flow test and viscoelastic behavior, including the storage modulus (G′), loss modulus (G″), and complex modulus (G*), has indicated that the rheological properties of the crude oil were greatly influenced by the temperature and the additive concentration.
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    Experimental investigation of the rheological behavior of algerian crude oils from the quagmires
    (Taylor & Francis, 2019) Souas, Farid; Safri, Abdelhamid; Benmounah, Abdelbaki
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    FTIR analysis and rheological behavior of bisphenol : a diglycidyl ether resin filled Fume-Silica
    (2014) Irekti, Amar; Bezzazi, Boudjema; Boualam, Chahrazed; Aribi, Chouaib; Dilmi, Hamid
    Silica-fume as fillers into polymers materials affect significantly the physical, mechanical and the electrical properties of the polymers. The polymer that we studied here is an epoxy based resin (STR) and silica fume (FS). This paper presents the dependency of the rheological behavior of the STR epoxy resin on the FS content within a temperature at which the reaction thermoset is neglected. We used a cone-plate viscometer for the study of the rheological behavior, and a scanning electron microscope is used for the analysis of the dispersion state of the FS in STR epoxy resin. Compared to the control without loads, an increase of 50% of the shear stress and the plastic viscosity were recorded for the composite. The software Rheowine viscometer enabled us to model and identified the rheological behavior of these mixtures with resin. The results obtained in this modeling, confirmed that the resin mixtures have shear-thinning rheological behavior, this last give us the model of Ostwald de Waele
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    Use of wood waste (Aleppo pine) as a superplasticiser in self-compacting mortars
    (2014) Daoui, Abdelhakim; Safi, Brahim; Rezak, M.; Zerizer, A.
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    Rheology and zeta potential of cement pastes containing calcined silt and ground granulated blast-furnace slag
    (2011) Safi, Brahim; Benmounah, A.; Saidi, M.
    This study aimed to analyse the re-use of dam silt as a supplementary binder for self-compacting concrete (SCC). When burnt, silt becomes more reactive because the kaolin it contains is converted into metakaolin. Portland cement, calcined or burnt silt and ground granulated blast furnace slag were used in this research. Cement pastes were prepared with blends containing two or three of these materials. The replacement ratio for burnt silt in both cases was 10% and 20% by cement weight and the ratio for the slag was a constant 30% by weight of the blend. Rheological and zeta potential tests were conducted to evaluate paste electrokinetics and rheological behaviour. The findings showed that burnt silt is apt for use as an addition to cement for SCC manufacture
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    Rheological behavior of the epoxy resin loaded with the pozzolan
    (2012) Irekti, Amar; Hami, Brahim; Aribi, C.; Bezzazi, B.; Briki, I.
    The study is to synthesize composite materials with news formul ations of thermosetting matrices by the incorporation of 40% of mineral fillers to reduce the cost of composite materials an d to improve implementation by increasing the viscosity and redu cing the withdrawal to its minimum value. The mineral filler increases si gnificantly in rheological parameters, whatever it nature of th e mineral filler. Compared to the control without charges, an increase of 60% of the shear stress and that of plastic viscosity were reco rded for the epoxy resin. The software Rheowine viscometer enabled us to m odel and identified the rheological behavior of these mixtures wit h resin. The results obtained in this modeling, confirmed that th e resin mixtures have shear-thinn ing rheological behavior, this last allows the model of the Ostwald de Waele