نتایج جستجو برای: impact mechanical

تعداد نتایج: 984648  

Journal: :Science and Education of the Bauman MSTU 2016

Gh.H. Akbari, I. Ebrahimzadeh,

Abstract: Horizontal continuous casting is widely used to produce semi-finished and finished metallic products. Homogeneity in metallurgical characteristics and mechanical properties in such products is of importance. In the present work microstructure and mechanical properties of a horizontal continuous cast pipe have been studied. Microstructural features were investigated by an optical mi...

Journal: :Open Access Journal of Neurology & Neurosurgery 2019

Journal: :نشریه دانشکده فنی 0
محمد علی گلعذار علی مهران شاه حسینی

the aim of the paper presented here is to develop the ti - micralloyed steel in otrer to oprtmize the mechanical properties after direct quenching from hot forging temperature. for this purpose, seven melts containing various amounts of titanium were prepared and cast in metal and sand molds. from the ingots, cast in metal mould, tractor links were produced by hot forging. the produced links we...

Journal: :iranian chemical communication 2016
shahryar pashaei soleyman hosseinzadeh

this study focuses on achieving high stiffness/strength and good fr characteristic of nylon 66/mca/nc nanocomposites, prepared via melt compounding by twin screw extruder. a synergistic effect of flame retardant systems based on melamine cyanurate and zinc borate on the flammability and mechanical behaviours of crysnanoclay reinforced nylon 66 nanocomposites have been reported. mechanical test ...

Journal: :journal of computational & applied research in mechanical engineering (jcarme) 2012
s. mohammadi* f. abdi

in the presented work, sulfur concrete and rubber were used for producing functionally graded materials (fgm). the physical and mechanical properties of sulfur concrete and rubber were changed continuously across the thickness. on one side, there was just rubber and, on the other, there was pure sulfur; the properties of each substance were moved to reach another. this kind of material was cons...

Journal: :iranian journal of materials science and engineering 0
e. najafi kani semnan university, 35196-45399, semnan, iran m. nejan semnan university, 35196-45399, semnan, iran a. allahverdi iran university of science and technology, narmak, tehran, iran

this article addresses the interplay between heat of hydration and physico-mechanical properties of calcium sulfate hemi-hydrate in the presence of retarding additives such as citric and malic acids and sodium citrate. the heat of hydration was measured using a semi-isothermal calorimeter. results proved that citric and malic acids had superior impact on hydration and mechanical properties. whi...

Introduction: Mechanical ventilation has been one of the most common forms of patients’ medical treatment in intensive care unit    and several factors affect the preparation of patients for weaning the mechanical ventilation. This study aimed at determining factors that have an impact on the duration of mechanical ventilation weaning.   Methods: In this sectional -an...

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