About the journal
Journal of Mechanical Research and Application (JMRA) is one of the professional Journals at Islamic Azad University, South Tehran Branch. JMRA publishing over 13 years, published numerous English original articles.
From 2020, by the permission of the technical committee of scientific jounals in central office of Islamic Azad University, the activities of JMRA by the same journal title and publishing both Persian and English languages articles have been approved.
The JMRA is quarterly publishing journal both online and in print, serving professionals in different aspects of mechanical engineering.
The review strategy of JMRA is single-blind peer review. The editorial board members meet regularly to decide about the articles. The editorial board members are all senior researchers from different universities all over the world. All mechanical engineering fields are of interest to this Journal. The journal scope includes: Fluid Mechanics, Solid Mechanics, Manufacturing Engineering, Automotive Engineering, Aerospace Engineering, Composite Materials and Structures, Smart Materials and Structures, Energy studies, Control and Vibration, Mechatronics, Bio and Nano Mechanics.
JMRA wishes to publish the new edition of the journal by the 20th of January 2021. Therefore, all researchers and university lecturers, PG students and also the industrial researchers are cordially invited to send and submit their original scientific manuscripts to this journal.
Authors who wish to submit their articles in English or Persian are invited to send their articles in a very simple common format of single column with figures and Tables within the text (consisting of Title, Names of authors and affiliations, Abstract, Keywords, Introduction, Methodology, Results and discussion, Conclusions, References) by word and PDF files to the official E-mail address of the journal
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JMRA
Recent Articles
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Open Access Article
1 - Static, dynamic and free vibration analysis of functional graded porous plates based on first-order shear deformation theory
کامران عاصمی سعید خبری مسعود باباییIssue 4 , Vol. 10 , Autumn 2020in this study, static, dynamic and natural frequency responses of the functionally graded saturated porous plate have been investigated. Two types of distributions including symmetric nonlinear distribution of porosity and asymmetric nonlinear distribution of porosity i Morein this study, static, dynamic and natural frequency responses of the functionally graded saturated porous plate have been investigated. Two types of distributions including symmetric nonlinear distribution of porosity and asymmetric nonlinear distribution of porosity in the thickness direction of the plate have been considered. First-order shear deformation theory (FSDT) and Lagrange method are used to model the problem. Finite element and Newmark direct integration methods are used to solve the governing motion equations in time and space domains, and then the effect of different parameters such as porosity and Skempton coefficients, and two different types of porosity distribution, length to thickness ratio and boundary conditions on static and time responses, and natural frequencies of functionally graded saturated porous plate have been investigated. Results show that by increasing the Skempton coefficient will always reduce the displacement and amplitude of vibration . Also, increasing the porosity coefficient will increase the displacement Manuscript profile -
Open Access Article
2 - An overview of the behavior of sandwich panels with Auxetic core under impact load
جوانشیر لطفیIssue 2 , Vol. 10 , Spring 2020 -
Open Access Article
3 - Studying the anatomy and the physiology of the respiratory system and investigating the HME filters of the ventilator device
سمیه یعقوبی حسین محمدی جوزدانی بهزاد کریم خانیIssue 4 , Vol. 10 , Autumn 2020In this study, first the anatomy and physiology of the respiratory system is reviewed, then the filters of the ventilator device are investigated. In the continuation of the research, after examining the above cases, a case similar to the HME filter of the ventilator de MoreIn this study, first the anatomy and physiology of the respiratory system is reviewed, then the filters of the ventilator device are investigated. In the continuation of the research, after examining the above cases, a case similar to the HME filter of the ventilator device will be designed, but with some changes in appearance in SolidWorks software. Finally, the existing stress analyzes are performed on the filter and in terms of case material is examined. Then in terms of fluid flow, which is usually oxygen, and as will be seen in the new design, the oxygen speed in the device will increase and there will be less steam, as well as excess water will be released, which will be examined in this study. Eventually thermal analysis on the filter is performed and it is illustrated increasing g the temperature about the filter cannot effect on the filter’s performance because it falls rapidly. Manuscript profile -
Open Access Article
4 - Exploration of the Physical and Mechanical Properties of Thianthrene Nanostructures by Using Scigress
Hassan Ghalami Bavil Olyaee Husam Jawad Oraibi AltaieIssue 4 , Vol. 13 , Autumn 2024Thianthrene and its derivatives have attracted considerable attention in the realm of organic semiconductors owing to their intriguing electronic and optical properties. This paper offers a comprehensive examination of Thianthrene, concentrating on its principal feature MoreThianthrene and its derivatives have attracted considerable attention in the realm of organic semiconductors owing to their intriguing electronic and optical properties. This paper offers a comprehensive examination of Thianthrene, concentrating on its principal features, including its highest occupied molecular orbital (HOMO) at -8.03 eV, lowest unoccupied molecular orbital (LUMO) at -0.46 eV, ultraviolet (UV) absorption spectrum, and infrared (IR) spectroscopy data. The inquiry, utilizing data derived from Scigress, unveils crucial insights into the electronic structure and spectroscopic traits of Thianthrene and its derivatives. The UV absorption spectrum at 160 nm provides glimpses into the optical attributes and potential applications in optoelectronic devices like OLEDs. Moreover, the IR spectroscopy data illuminates the molecular vibrations and structural attributes of Thianthrene, facilitating the understanding of its chemical reactivity and potential strategies for functionalization. Overall, the results underscore Thianthrene's significance as a promising contender for organic semiconductor materials and highlight avenues for further exploration and development in this domain. Additionally, the ultimate heat of formation of Thianthrene is computed using computational modeling techniques offered by Scigress, yielding a value of 56.4736 kcal/mol. This calculated heat of formation furnishes critical thermodynamic data, contributing to a more profound understanding of Thianthrene's stability and reactivity in various chemical environments. Manuscript profile -
Open Access Article
5 - types of electric cars; Features, fuel cost comparison, ownership and emissions and challenges
نیما راسخ صالح حسین افشارIssue 4 , Vol. 13 , Autumn 2024 -
Open Access Article
6 - Dynamic Analysis of Hybrid Robot 3PRS-RRP
علیرضا رمضانی فر حسن ظهور علی اکبر موسویانIssue 1 , Vol. 1 , Winter 2009In this article a new and an accurate method for kinematic and dynamic analysis of a parallel robot 3PRS and a hybrid robot (parallel and serial) 3PRS-RRP are presented, which is based on the Denavit-Hartenberg transformation matrix algebra. First, basic properties of v MoreIn this article a new and an accurate method for kinematic and dynamic analysis of a parallel robot 3PRS and a hybrid robot (parallel and serial) 3PRS-RRP are presented, which is based on the Denavit-Hartenberg transformation matrix algebra. First, basic properties of various kinds of robots are compared, and then the Denavit-Hartenberg parameters and their table are introduced. Next, the methods of forward and inverse kinematic are explained and system dynamic equations are obtained by Lagrange method. Finally for defined sizes and with imagination of a rotational movement for the center point of the moving plate of parallel robot and two input kinematic for serial robot, a few kinematic and dynamic results for parallel and serial robot by Newton and Lagrange methods are presented for singularity consideration. Generally, the forward kinematic solution of parallel robots and inverse kinematic solution of serial robots are difficult. For these hybrid robots, it would be better to use parallel robots, which have linear movement on the moving plate in the forward mode to increase the space and strength, or the two robots be time independent. Manuscript profile -
Open Access Article
7 - Investigation of blood flow as third order non-Newtonian fluid inside a porous artery in the presence of a magnetic field by an analytical method
مهران خاکی جامعی محمدرضا سیجانیIssue 2 , Vol. 9 , Spring 2017In this research various nonlinear fluid models have been introduced and the balloon movement in the porous arteries, including third-order non-Newtonian fluid, is described under the influence of the magnetic field. In order to solve the nonlinear equations governing t MoreIn this research various nonlinear fluid models have been introduced and the balloon movement in the porous arteries, including third-order non-Newtonian fluid, is described under the influence of the magnetic field. In order to solve the nonlinear equations governing the desired artery, an analytical method of approximation collocation and least squares are proposed. The effect of various parameters such as Brownian motion, thermophoresis and pressure gradient are shown on the distribution of velocity and fluid temperature. According to the studies, Increase the thermophoresis parameter and Brownian motion are increases the temperature. Also, by increasing the values of the electromagnetic parameter, fluid velocity decreases. Although many papers have investigated the flow of intra-arterial blood in the presence of MHD, it is clear that the governing equations of these articles unfortunately reveal obvious errors by extracting the governing equations. In this paper, the equations have been revised and corrected. It can also be seen by increasing the thermophoresis and Brownian parameters, increases the temperature of the nanofluid, but reduces velocity of the nanofluid and also increase the porosity parameter, the velocity of fluid flow between the balloon and the vessel wall decreases. Manuscript profile -
Open Access Article
8 - Increasing Total Output Efficiency of The Photovoltaic Module by Using Photovoltaic - Thermal Collector
سید امیر به مونسیIssue 2 , Vol. 10 , Spring 2020solar radiation increases the surface temperature of the photovoltaic module (PV). This increase in temperature reduces the electrical efficiency and useful life of photovoltaic cells. One way to reduce the temperature of photovoltaic modules is to reduce the surface te Moresolar radiation increases the surface temperature of the photovoltaic module (PV). This increase in temperature reduces the electrical efficiency and useful life of photovoltaic cells. One way to reduce the temperature of photovoltaic modules is to reduce the surface temperature of the module by circulating fluids such as water or air. Devices that operate on this basis are called combined photovoltaic - thermal collectors (PV/T). Combined photovoltaic-thermal collectors are usually made by integrating a photovoltaic module and a heat collector to prevent direct contact of the coolant fluid with the module surface. The heat absorber is very important due to the heat dissipation from the module surface to the fluid, so the thermal and electrical performance of a PV/T collector depends on the proper design of the absorber. In this research, first the classification and different structures of PV/T collectors were investigated. Then, thermal and electrical efficiency of nine practical of PV/T collector were theoretically compared with each other. Then the electrical efficiency of sheet and tube type of PV/T collector was tested by sample PV module. According to the results of this study, if the inlet fluid temperature is low, the PV/T collector will have a higher total efficiency compared to the separate heat collector or PV module. Manuscript profile -
Open Access Article
9 - Effect of corrugated core on low-velocity impact response of sandwich panels with layer-wise graded foam core and smart face sheets
فرنام حیدری پبدانیIssue 2 , Vol. 10 , Spring 2020In the discussion of impact on composite structures, increasing the stiffness of structural procedures is one of the most important strategies which is taken to increase the impact resistance of composite structures. In this study, the effect of corrugated core on low v MoreIn the discussion of impact on composite structures, increasing the stiffness of structural procedures is one of the most important strategies which is taken to increase the impact resistance of composite structures. In this study, the effect of corrugated core on low velocity impact response of sandwich panels with smart face sheets and layer-wise graded foam core was investigated. In this research, foam cores with different densities are stacked up and an aluminum corrugated core are the two different character of core and graphite / epoxy which are reinforced by memory alloy wires (SMA) are considered as face-sheets. Sandwich structures with different configurations were subjected to low-velocity impact and the results showed that the addition of corrugated core increased the impact resistance of the structure and increased the contact force of the impact. Manuscript profile -
Open Access Article
10 - Extraction of the governing equations for steady state and axisymmetric behavior of a porous piezoelectric circular solid plate
علی ابجدی محسن جباری احمد رضا خورشیدوندIssue 3 , Vol. 10 , Summer 2020Based on the available evidence, porous piezoelectric materials have great potential for the development of smart (active) structures with high strength, high stiffness and light weight such as ceramics and composites. Among the ceramic materials with porous piezoelectr MoreBased on the available evidence, porous piezoelectric materials have great potential for the development of smart (active) structures with high strength, high stiffness and light weight such as ceramics and composites. Among the ceramic materials with porous piezoelectric compounds, can be mentioned Lead-zirconate-titanate (PZT), Lead-titanate (PbTiO2), Lead-zirconate (PbZrO3), Barium-titanate (BaTiO3), Cadmium-selenide (CdSe), etc. This study extracts the governing partial differential equations for steady- state and axisymmetric behavior of a circular solid plate is made of an undrained saturated porous piezoelectric hexagonal material symmetry of class 6 mm. The porosities of the plate vary through the thickness; thus, material properties, except poisson’s ratio, are assumed as exponential functions of axial variable z in cylindrical coordinates. Additionally, piezothermoelastic behavior of a circular plate subject to external thermal, mechanical and electrical loads is considered, so various concepts including three-dimensional linear elasticity theory and dielectric theory are used in combination to create a linear piezoelectric model. The extraordinary and special industrial properties of porous piezoelectric materials, their increasing use and the need to know the behavior of these materials, doubles the importance of this research. Manuscript profile
