رزگار حسن زاده
دانشجوی دکتری، مهندسی مکانیک، دانشگاه ارومیه، ارومیه، ایران
[ 1 ] - مطالعه ضخامت دیواره سلولی و استحکام به ضربه در فوم های میکروسلولی نانوکامپوزیتی پلی پروپیلن تولیدی به روش توده ای
فوم‌های پلیمری نانوکامپوزیتی به دلیل خواص ویژه‌ای که دارند امروزه به صورت گسترده‌ای مورد توجه مجامع علمی و صنعتی قرار گرفته‌اند. فوم‌های با ساختار سلول باز قابلیت بالایی در جذب صدا، آب، ضربه و رطوبت دارند. از ضخامت دیواره سلولی می‌توان به عنوان پارامتری برای بررسی راهکارهای دست‌یابی به ساختار سلول باز استفاده کرد. در تحقیق حاضر به بررسی خواص ساختاری و مکانیکی فوم‌های نانوکامپوزیتی پلی پروپیلن/ن...
[ 2 ] - EXPERIMENTAL POLYMERIC NANOCOMPOSITE MATERIAL SELECTION FOR AUTOMOTIVE BUMPER BEAM USING MULTI-CRITERIA DECISION MAKING METHODS
Material selection is a main purpose in design process and plays an important role in desired performance of the products for diverse engineering applications. In order to solve material selection problem, multi criteria decision making (MCDM) methods can be used as an applicable tool. Bumper beam is one of the most important components of bumper system in absorbing energy. Therefore, selecting...
[ 3 ] - Thermal-insulation performance of low density polyethylene (LDPE) foams: Comparison between two radiation thermal conductivity models
The loss of energy especially in industrial and residential buildings is one of the main reasons of increased energy consumption. Improving the thermal insulation properties of materials is a fundamental method for reducing the energy losses. Polymeric foams are introduced as materials with excellent thermal insulation properties for this purpose. In the present study, a deep theoretical invest...
[ 4 ] - Effect of Different Nanoparticles and Friction Stir Process Parameters on Surface Hardness and Morphology of Acrylonitrile Butadiene Styrene
In the present study, the effect of material and process parameters on the morphological and hardness properties of friction stir process (FSP) acrylonitrile butadiene styrene (ABS) were investigated. For this purpose, firstly ABS polymeric sheets were injection molded. Then a slot with predetermined depth and width was created on sheets using a horizontal milling machine. Nano type (nanoclay, ...
[ 5 ] - Tensile and Morphological Properties of Microcellular Polymeric Nanocomposite Foams Reinforced with Multi-walled Carbon Nanotubes
Polyamide 6 (PA6) is used in many applications due to its advantages and improving its properties seems essential. For this purpose in the present study, PA6 was melt compounded with various multi-walled carbon nanotubes (MWCNTs) contents and then was foamed using Azodi carbon amide (ACA) as blowing agent under different injection molding conditions. Morphological properties were investigated u...
[ 6 ] - The Effects of Newmark Method Parameters on Errors in Dynamic Extended Finite Element Method Using Response Surface Method
The Newmark method is an effective method for numerical time integration in dynamic problems. The results of Newmark method are function of its parameters (β, γ and ∆t). In this paper, a stationary mode I dynamic crack problem is coded in extended finite element method )XFEM( framework in Matlab software and results are verified with analytical solution. This paper focuses on effects of main pa...
[ 7 ] - The Effect of TiO2 Nanoparticles on Mechanical Properties of Poly Methyl Methacrylate Nanocomposites (RESEARCH NOTE)
Various applications of nanocomposites were a good motivation to start a study on this wide spreading field of science. Current research is an investigation on incorporating different percentages of TiO2 nanoparticle as reinforcement to a base material which here is poly methyl methacrylate (PMMA). In this study various percentages of TiO2 (0.5, 1 and 2 wt%) were added to pure PMMA and effect o...
[ 8 ] - Welding Properties of Polymeric Nanocomposite Parts Containing Alumina Nanoparticles in Friction Stir Welding Proces
Although in recent years, welding of polymers has been developed but welding of polycarbonates is still faced with serious challenges such as improving the quality of welded section. In the present study, mechanical properties of polycarbonate friction stir welded samples with different nano alumina content were investigated. For this purpose, firstly polycarbonate (as matrix) was melt compound...
[ 9 ] - The Study of Deep Drawing of Brass-steel Laminated Sheet Composite Using Taguchi Method
Deep drawing process is one of the most applicable methods in producing industrial parts. In this process, the initial blank deforms to final product using a rigid punch and die. In this investigation, the effect of deep drawing process parameters of brass/steel laminated sheet composites on required forming force has been investigated. The process simulated using finite element method (FEM) an...
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