The Experts below are selected from a list of 49929 Experts worldwide ranked by ideXlab platform
Syed Minhaj Saleem Kazmi - One of the best experts on this subject based on the ideXlab platform.
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Axial Stress strain behavior of macro synthetic fiber reinforced recycled aggregate concrete
Cement & Concrete Composites, 2019Co-Authors: Syed Minhaj Saleem Kazmi, Muhammad Junaid Munir, Indubhushan Patnaikuni, Yingwu Zhou, Feng XingAbstract:Abstract This study aims to investigate the Axial Stress-strain behavior of macro-synthetic fiber reinforced recycled aggregate concrete. Concrete cylinders reinforced with macro-synthetic fibers were tested under Axial compression, with the variation of three different replacement ratios of recycled aggregates (i.e., 0, 50 and 100%) and three different dosages of macro polypropylene fibers (i.e., 0, 0.5 and 1% of volume of recycled aggregate concrete). A comparative study of the existing Stress-strain models for steel fiber reinforced normal and recycled aggregate concrete with the test results indicates that the Stress-strain behavior of steel fiber reinforced normal and recycled aggregate concrete can be well predicted by these existing models. No Stress-strain model for macro-synthetic fiber reinforced normal and recycled aggregate concrete has been developed. Based on the test results, a Stress-strain model is developed in this work by modifying the parameters of best performing Stress-strain model for steel fiber reinforced normal aggregate concrete. The proposed model can effectively predict the Stress-strain behavior of both steel and macro-synthetic fiber reinforced normal and recycled aggregate concrete. Test results show that the peak Stress, peak strain and ultimate strain of concrete specimens increase with the increase in fiber dosage and the addition of fibers has a better effect on recycled aggregate concrete and as compared to normal aggregate concrete.
Ismail Mechab - One of the best experts on this subject based on the ideXlab platform.
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sound wave propagation in single walled carbon nanotubes with initial Axial Stress
Journal of Applied Physics, 2008Co-Authors: Houari Heireche, Abdelouahed Tounsi, Abdelnour Benzair, Ismail MechabAbstract:This paper studies the vibrational characteristics of single-walled carbon nanotubes (SWNTs) with initial Axial loading based on the theory of nonlocal elasticity. The consistent equations of motion for the nonlocal Euler-Bernoulli and Timoshenko beam models are provided taking into account the initial Axial Stress. The small scale effect on CNT wave propagation dispersion relation is explicitly revealed for different CNT wave numbers and diameters by theoretical analyses and numerical simulations. In addition, the applicability of the two beam models is explored by numerical simulations. The research work reveals the significance of the effects of small scale, transverse shear deformation and rotary inertia on wave propagation in short SWCNTs with initial Axial loading.
Feng Xing - One of the best experts on this subject based on the ideXlab platform.
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Axial Stress strain behavior of macro synthetic fiber reinforced recycled aggregate concrete
Cement & Concrete Composites, 2019Co-Authors: Syed Minhaj Saleem Kazmi, Muhammad Junaid Munir, Indubhushan Patnaikuni, Yingwu Zhou, Feng XingAbstract:Abstract This study aims to investigate the Axial Stress-strain behavior of macro-synthetic fiber reinforced recycled aggregate concrete. Concrete cylinders reinforced with macro-synthetic fibers were tested under Axial compression, with the variation of three different replacement ratios of recycled aggregates (i.e., 0, 50 and 100%) and three different dosages of macro polypropylene fibers (i.e., 0, 0.5 and 1% of volume of recycled aggregate concrete). A comparative study of the existing Stress-strain models for steel fiber reinforced normal and recycled aggregate concrete with the test results indicates that the Stress-strain behavior of steel fiber reinforced normal and recycled aggregate concrete can be well predicted by these existing models. No Stress-strain model for macro-synthetic fiber reinforced normal and recycled aggregate concrete has been developed. Based on the test results, a Stress-strain model is developed in this work by modifying the parameters of best performing Stress-strain model for steel fiber reinforced normal aggregate concrete. The proposed model can effectively predict the Stress-strain behavior of both steel and macro-synthetic fiber reinforced normal and recycled aggregate concrete. Test results show that the peak Stress, peak strain and ultimate strain of concrete specimens increase with the increase in fiber dosage and the addition of fibers has a better effect on recycled aggregate concrete and as compared to normal aggregate concrete.
Ping Huai - One of the best experts on this subject based on the ideXlab platform.
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thermal conductivity of single walled carbon nanotubes under Axial Stress
Journal of Physical Chemistry C, 2010Co-Authors: Cuilan Ren, Wei Zhang, Zhiyuan Zhu, Ping HuaiAbstract:The thermal conductivity of single-walled carbon nanotubes (SWCNTs) under Axial Stress is studied by nonequilibrium molecular dynamics simulation. The thermal conductivity is found to increase and then decrease with the tube elongation changing from an Axially compressed state to a stretched state. The phonon density of states of the systems is analyzed to elucidate the variation of heat conduction with respect to the Stress in CNTs. The primary peak of the phonon spectrum shows a blue shift or red shift as the SWCNT is compressed or stretched. These shifts correspond to the change of the elasticity coefficient of the CNTs. The variation trend of primary peak height of radial phonon spectra with Axial strain is similar to that of the thermal conductivity, which indicates that the radial phonon modes, especially the high-frequency modes, play a dominant role in the heat conduction mechanism of CNTs.
Muhammad Junaid Munir - One of the best experts on this subject based on the ideXlab platform.
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Axial Stress strain behavior of macro synthetic fiber reinforced recycled aggregate concrete
Cement & Concrete Composites, 2019Co-Authors: Syed Minhaj Saleem Kazmi, Muhammad Junaid Munir, Indubhushan Patnaikuni, Yingwu Zhou, Feng XingAbstract:Abstract This study aims to investigate the Axial Stress-strain behavior of macro-synthetic fiber reinforced recycled aggregate concrete. Concrete cylinders reinforced with macro-synthetic fibers were tested under Axial compression, with the variation of three different replacement ratios of recycled aggregates (i.e., 0, 50 and 100%) and three different dosages of macro polypropylene fibers (i.e., 0, 0.5 and 1% of volume of recycled aggregate concrete). A comparative study of the existing Stress-strain models for steel fiber reinforced normal and recycled aggregate concrete with the test results indicates that the Stress-strain behavior of steel fiber reinforced normal and recycled aggregate concrete can be well predicted by these existing models. No Stress-strain model for macro-synthetic fiber reinforced normal and recycled aggregate concrete has been developed. Based on the test results, a Stress-strain model is developed in this work by modifying the parameters of best performing Stress-strain model for steel fiber reinforced normal aggregate concrete. The proposed model can effectively predict the Stress-strain behavior of both steel and macro-synthetic fiber reinforced normal and recycled aggregate concrete. Test results show that the peak Stress, peak strain and ultimate strain of concrete specimens increase with the increase in fiber dosage and the addition of fibers has a better effect on recycled aggregate concrete and as compared to normal aggregate concrete.