2013
6
4
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72
1

Introduse and Need Assessment of Regional Aircrafts by Software and Modeling
http://jsme.iaukhsh.ac.ir/article_519154.html
1
An analysis was conducted to examine the market visibility of small aircraft as a transportation mode in competition with automobile and scheduled commercial air travel by estimating the pool of users that would potentially switch ondemand air travel due to cost/time saving. These new aircraft greatly increase the practicality of regional aircraft as a transportation mode that can avoid the congestion associated with other modes. In this research, after introducing small aircraft as a new mode of transportation, we use some modeling method such as ‘’DSM’’ (Decision Supporting Model) and ‘’TSAM’’ (Transportation System Analysis Model) to investigate and need assessment to small aircraft transportation (SAT).
0

1
7


H.
Sadat Nazeri
 MSc, Department of Aerospace Engineering, MalekAshtar University of Technology, Tehran, Iran
Iran
hsn.parvaz@gmail.com


M.
Ali Shahi Ashtian
Associate Professor, Department of Aerospace Engineering, MalekAshtar University of Technology, Tehran, Iran.
Iran
Small Aircraft Transportation Decision Supporting Model Transportation System Analysis Model Need assessment Regional aircraft
[[1] Dr. Hojong Baik. Research Scientist. Virginia Tech. Blacksburg, VA. U.S.A., Nicholas Hinze, Graduate Research Associate, Blacksburg, VA. U.S.A. , Dr. Antonio A. Trani. Associate Professor. Virginia Tech. Blacksburg, VA. U.S.A. , Development of a Decision Support Model Using Map Objects to StudyTransportation Systems , 2012, NASA USA.##[2] Hojong Baik, Antonio A. Trani, Nicolas Hinze, Howard Swingle,Senanu Ashiabor, and Anand Seshadri, Forecasting Model for Air Taxi, Commercial Airline, and Automobile Demand in the United States Journal of the Transportation Research Board,Vol.2052 , No.2 , 2008 ,pp.920##]
1

Enhancement Performance New Generation of CPU Cooling System Using WaterAL2O3 Nanofluid
http://jsme.iaukhsh.ac.ir/article_519155.html
1
By increase in the power of computer systems and enhanced power of the components and their temperature, including the central processing unit (CPU), cooling just by the air is not effective and there is need for more powerful systems to cool down and increase the power of the cooling system. In this article simulation of the heat exchanger material of the fluid cooling system has been studied using the ANSYSFluent software. In this kind of heat exchanger, the water based aluminum oxide nanofluid is used instead of water to increase the total heat transfer coefficient and causing decrease in the output temperature and enhancement of fluid cooling system performance. The results with different speeds of 1000 rpm, 1500 rpm and 2000 rpm and for various volume fractions (13%) have been obtained. by increase in the rotational speed from 1000 rpm to 2000 rpm the flowing capacity has increased from 0.0138 kg/s to 0.026 kg/s. for the speed of 1000 rpm, the amount of heat transfer has increased about 13% for the 3% volume fraction. By increase in the volume fraction of aluminum oxide nanofluid, the total heat transfer coefficient increases too, and this increase in the coefficient is approximately similar for different speeds and it causes decrease in the output temperature of the radiator fluid
0

9
18


M.
Aliabadi
MSc Student, Department of mechanical engineering, Khomeinishahr Branch, Islamic Azad University, Isfahan, Iran
Iran
mohammad.aliabadi@iaukhsh.ac.ir


A.R.
Shateri
Assistant Prof., Department of mechanical engineering, University of Shahrekord, Shahrekord, Iranx
Iran
Liquid Cooling System
heat transfer
CPU
Fan
Radiator
Al2O3
[[1] Miller.D and Kang.S, Closed Loop Liquid Cooling for High Performance Computer Systems,ASME 2007 InterPACK Conference, Vancouver, British Columbia, Canada, 2007, pp. 509515.##[2] Yu.C.W and Webb R.L, Thermal design of a desktop computer system using CFD analysis, Semiconductor ThermalMeasurement and Management. Seventeenth Annual IEEE Symposium, 2001, pp. 1826.##[3] JaeYoung.C, Hee Sung.P, Jong In.J and Julia S,A System Design of Liquid Cooling Computer Based on the Micro Cooling Technology, Thermal and Thermomechanical Phenomena in Electronics Systems, 2006. ITHERM '06. The Tenth Intersociety Conference on, 2006, pp. 157160.##[4] Lee.T.Y,Andrews.P and Saums.D, Compact liquid cooling system for small, moveable electronic equipment, Semiconductor Thermal Measurement and Management Symposium, 1992. SEMITHERM VIII., Eighth Annual IEEE, 1992, pp. 3036.##[5] Tuckerman.D.B and Pease.R.F.W.,Highperformance heat sinking for VLSI, Electron Device Letters, IEEE, Vol.2, 1981, pp.126129,.##[6] Xie.L, Liu.Z.J, He.Y.L and Tao.W.Q, Numerical study of laminar heat transfer and pressure drop characteristics in a watercooled minichannel heat sink, Applied Thermal Engineering, Vol. 29, 2009, pp. 6474.##[7] Jasperson.B.A, Yongho.J, Turner.K.T, Pfefferkorn.F.E and Weilin.Q, Comparison of MicroPinFin and Microchannel Heat Sinks Considering ThermalHydraulic Performance and Manufacturability, Components and Packaging Technologies, IEEE Transactions on, Vol.33, 2010, pp. 148160.##[8] Salem.T.E, Porschet.D and Bayne.S.B, Thermal performance of watercooled heat sinks: a comparison of two different designs, Semiconductor Thermal Measurement and Management Symposium, 2005 IEEE Twenty First Annual IEEE, 2005, pp. 264269.##[9] Nazari.M, Karami.M and Ashouri.M, Comparing the thermal performance of water, Ethylene Glycol, Alumina and CNT nanofluids in CPU cooling: Experimental study, Experimental Thermal and Fluid Science, Vol.57, 2014, pp. 371377.##[10] Rafati.M, Hamidi.A.A and Shariati Niaser.M, Application of nanofluids in computer cooling systems (heat transfer performance of nanofluids), Applied Thermal Engineering, Vol.45–46, 2012, pp. 914.##[11] M.Faraday.(1847). The Birth of Nanotechnology.Available:http://www.nanogallery.info/nanogallery/?ipg=126.##[12] Bucak.S, Importance of Defining when Applying, J Chem Eng Process Technol, Vol.2, 2011,pp. 4350.##[13] D. R. Lide. CRC Handbook of Chemistry and Physics Internet Version 2005 (85ed.).CRC Press.Available: http://www.hbcpnetbase.com.##[14] Sridhara.V and Satapathy.L, Al2O3based nanofluids: a review, Nanoscale Research Letters, Vol.6, 2011, pp. 116.##[15] FLUENT 6.3 User’s Guide.##[16] Xuan.Y and Roetzel.W, Conceptions for heat transfer correlation of nanofluids,International Journal of Heat and Mass Transfer, Vol.43,2000, pp. 37013707.##[17] Kang.H.U, Kim.S.H and Oh.J, Estimation of Thermal Conductivity of Nanofluid Using Experimental Effective Particle Volume," Experimental Heat Transfer, Vol.19,2006, pp. 181191.##]
1

Presentation and Analysis of Methods for Increasing Glue Joint Strength in the Same Length Joint
http://jsme.iaukhsh.ac.ir/article_519156.html
1
Glue joints are more useful in Aerospace so in this article we presented new method for glue joint. In this method the maximum stresses that occurs at the edges of the bottom glue joint and cause ultimate failure in this type of connection is Decrease and increase the glue joint strength. In this method glue in the area overlapping the discrete and separate column considered Also, the connection is assumed to be identical for the proposed method. As a result, in this case less glue is used for connection. At first the proposed method has been studied to offer and distribute the tension in the glue is analyzed then modeling glue joints for common conditions and proposed with use of the finite element software for numerical analysis
0

19
24


A.H. Ehsani
Ehsani
Department of Mechanical Engineering, Firouzkouh Branch, Islamic Azad University, Mazandaran, Iran
Iran
amirhosien_ehsani@yahoo.com


M.
Shirzadian Gilan
Department of Mechanical Engineering, Firouzkouh Branch, Islamic Azad University, Mazandaran, Iran
Iran


A.
Ghafori Sayad
 Department of Mechanical Engineering, Firouzkouh Branch, Islamic Azad University, Mazandaran, Iran
Iran


A.
Shokrgozar Navi
Department of Mechanical Engineering, Firouzkouh Branch, Islamic Azad University, Mazandaran, Iran
Iran
Glue joints
Length joint
Joint strength
Stress distribution
Finite Element
[[1] Goland .M, Reissner .E, The Stress in Cemented Joints. ASME Journal Applied Mechanics, Vol. 66, No. 4, 1944, pp. 1727.##[2] Wooley.G.R, Carver .O.R, Stress Concentration Factor For Bonded Lap Joints , Journal of Aircraft, Vol. 8, No.10 , 817820. 1971.##[3] HartSmith L.J, AdhesiveBonded SingleLap Joints, NASA, CR1122, vol. 36, 1973.##[4] Chang D.J., Muki R., Stress Distribution in Lap Joint Under TensionShear, International Journal of SolidsStructures , Vol. 10 , No. 5, 1974, pp. 503517.##[5] قرابی م.ج.ا.ا ، احسانی ا.ح ، ارائه و تحلیل روش مناسب جهت افزایش استحکام اتصالات چسبی در حالت طول اتصال یکسان، کنفرانس بین المللی پژوهش های نوین در مهندسی، ایران دانشگاه آزاد اسلامی واحد خمینی شهر، اسفند 1391##[6] Pereira A.B., Strength of Adhesively Bonded Stainless Steel Joints. International Journal of Adhesion & Adhesive, vol. 23, No. 8, 2003, pp. 315322.##[7] Fawiza S., Almahaidi R., Zhao X.–L., Experimental and Finite Element Analysis of a Double Strap Joint between Steel Plates and Normal Modulus CFRP, International Journal of Composite Structure, In pres , rec., 2005.##]
1

Nonlocal Mechanical Buckling Analysis of Nano Single Layer Sheets Using Differential Quadrature method
http://jsme.iaukhsh.ac.ir/article_519157.html
1
The following article investigates buckling of moderately thick circular Nano plates with an orthotropic property under uniform radial compressive inplane mechanical load. Taking into account nonlocal elasticity theory (Eringen), principle of virtual work, first order shear deformation plate theory (FSDT) and nonlinear VonKarman strains, the governing equations are obtained based on displacements. The stability equations are derived from the neighbor equilibrium estate. The differential quadrature method (DQM) as a numerical procedure is applied to discretize the derivatives equations with a nonuniform mesh point distribution (ChebyshevGaussLobatto). The accuracy of the present results is validated by comparing the solutions with those reported by the available literatures. The effect of nonlocal parameter, thickness and radius are investigated on nondimension buckling loads. From the results, it can be seen that the nondimension buckling load of Graphene sheets increases by decreasing flexibility of boundary condition and increasing the rate of nonlocal parameter. It can be observed that with increasing the nondimensional thickness of plate, the nondimension buckling loa reduces
0

25
35


M.
Sadeghian
MSc. Student, Department of mechanics, Islamic Azad University, Mashhad Branch, Iran.
Iran
msadeghian@mshdiau.ac.ir


M.
Jabbarzadeh
Assistant Professor, Department of mechanics, Islamic Azad University, Mashhad Branch, Iran.
Iran
Mechanical buckling
Circular
Nonlocal elasticity
Differential quadrature method
[[1]Taniguchi N., On the Basic Concept of Nanotechnology.Proceedings of the International Conference of Production Engineering, London, 1974, pp. 1823.##[2] Ma M., Tu J.P., Yuan Y.F., Wang X.L., Li F., Mao K.F., Zeng Z.Y., Electrochemical Performance of ZnO Nanoplates as Anode Materials for Ni/Zn Secondary Batteries, Journal of Power Source, vol. 179, No. 1, 2008 , pp. 395400.##[3] Agesen M., Sorensen V., Nanoplates and Their Suitability for Use as Solar Cells, Proceeding of Clean Technology, Boston Secondary Batteries, Journal of Power Source, vol. 179, No. 11, 2008, pp. 395400.##[4]Yguerabide J., Yguerabide E. E.,Resonance Light Scattering Particles as Ultrasensitive Labels for Detection of Analytes in a wide Range of Applications, Journal of Cellular BiochemistrySupplement, vol. 37, No. 37, 2011, pp. 7181.##[5] Novoselov K.S., Geim A.K., Morozov S.V., Jiang D., Zhang Y., Dubonos S.V., Grigorieva I.V., Firsov A.A., Electric Field Effect in Atomically Thin Carbon Films. Science, vol. 306, No. 5696, 2004, pp. 666–669.##[6] Xu Z.P.,Buehler M.J. ,Geometry controls conformation of graphene sheets: membranes, ribbons, and scrolls, ACSNano, vol. 4, 2010, pp. 3869–3876.##[7] Chiu H.Y., Hung P., Postma H.W.Ch., Bockrath M.,AtomicScale Mass Sensing Using Carbon Nanotube Resonators, Nano Lett, vol. 8, 2008, pp. 4342–4346.##[8] Hernandez E., Goze C., Bernier P., Rubio A. , Elastic Properties of C and BxCyNz Composite Nanotubes. Physics Review Letters, vol. 80, 1998, pp. 4502–4505.##[9] Li C.Y., Chou T.W., Elastic wave velocities in singlewalled carbon nanotubes, Physics Review B, vol. 73, 2006, pp. 245407.##[10]Li C., Chou T.W., Singlewalled carbon nanotubes as ultrahigh frequency nanomechanical resonators, Physics Review B, vol. 68, 2003, pp. 073405.##[11]Eringen. A.C, Nonlocal Continuum Field Theories, New york, SpringerVerlag, 2002.##[12] Fleck N.A., Hutchinson J.W.,Strain Gradient Plasticity, Advance applied mechanics, Vol.33, 1997, pp. 295361.##[13]Yang F., Chong A.C.M., Lam D.C.C., Tong P.,Couple Stress Based Strain Gradient Theory for Elasticity, International journal of solid structures, vol. 39, 2002, pp. 27312743.##[14] Parnes A., Chiskis J., Buckling of nanofibre reinforced composites: a reexamination of elastic buckling. Mechanical Physics Solids, vol. 50, 2002, pp. 855–879.##[15] Pradhan S. C., Murmu T. ,Small Scale Effect on the Buckling of SingleLayered Graphene Sheets under Biaxial Compression via Nonlocal Continuum Mechanics, Computational Materials Science, vol. 47, 2009, pp. 268274.##[16] Samaei A.T., Abbasion S., Mirsayar M.M., Buckling Analysis of a SingleLayer Graphene Sheet Embedded in an Elastic Medium Based on Nonlocal Mindlin Plate Theory, Mechanics Research Communications, vol. 38, 2011, pp. 481485.##[17] Farajpour A., Danesh M., Mohammadi M., Buckling analysis of variable thickness nanoplates using nonlocal continuum mechanics, Physica E, vol. 44, 2011, pp. 719–727.##[18] Narendar S., Gopalakrishnan S.,Critical buckling temperature of singlewalled carbon nanotubes embedded in a oneparameter elastic medium based on nonlocal continuum mechanics, Physica E, vol. 43, 2011, pp.1185–1191.##[19] Lim C.W., Yang Q., Zhang J.B., Thermal buckling of nanorod based on nonlocal elasticity theory, International Journal of NonLinear Mechanics, vol. 47, 2012, pp. 496505.##[20] Farajpour A., Shahidi A.R., Mohammadi M., Mohzoon M., Buckling of Orthotropic Micro/Nanoscale Plates under Linearly varying inplane load via nonlocal continuum mechanics, Composite Structures, vol. 94, 2012, pp. 16051615.##[21] Prasanna Kumar T.J., Narendar S., Gopalakrishnan S., Thermal vibration analysis of monolayer graphene embedded in elastic medium based on nonlocal continuum mechanics. Composite Structures, vol. 100, 2013, pp. 332–342.##[22] Emam S.A., A general nonlocal nonlinear model for buckling of nanobeams.Applied Mathematical Modelling , vol. 37, 2013, pp. 6929–6939.##[23] Mohammadi M., , Farajpour A., Moradi A., Ghayour M.,Shear buckling of orthotropic rectangular graphene sheet embedded in an elastic medium in thermal environment.Composites: Part B, vol. 56, 2014, pp. 629–637.##[24]SarramiForoushani S., Azhari M., Nonlocal vibration and buckling analysis of single and multilayered graphene sheets using finite strip method including van der Waals effects, Physica E, vol. 57, 2014, pp. 83–95.##[25] Golmakania M.E., Rezatalab J., Nonuniform biaxial buckling of orthotropic nanoplates embedded in an elastic medium based on nonlocal Mindlin plate theory, Composite Structures, vol. 119, 2015, pp. 238–250.##[26] Farajpour A., Mohammadi M., Shahidi A.R., Mahzoon M. ,Axisymmetric Buckling of the Circular Graphene Sheets with the Nonlocal continuum plate model, Physica E, vol. 43, 2011, pp. 1820–1825.##[27]Karamooz Ravari M.R., Shahidi A.R., Axisymmetric buckling of the circular annular nanoplates using finite difference method, Meccanica, vol. 48, 2013, pp. 135–144.##[28]Bedroud M., HosseiniHashemi S., Nazemnezhad R., Buckling of circular/annular Mindlin nanoplates via nonlocal elasticity, Acta Mechanics, vol. 224, 2013, pp. 26632676.##[29] Nosier A., Fallah F., Nonlinear Analysis of Functionally Graded Circular Plates under Asymmetric Transverse Loading, International journal of nonLinear mechanics, vol. 44, 2009, pp. 928942.##[30] Shu C., Differential Quadrature and Its Application in Engineering, 2000, Berlin, Springer.##]
1

Review of MicroParticles of Hydroxyapatite Nanoparticles by Ball Milling
http://jsme.iaukhsh.ac.ir/article_519158.html
1
Hydroxyapatite (HA) is the most important bioactive ceramics because of biocompatibility and structural similarity to the mineral part of bones and teeth of broad clinical application in the field of dentistry, orthopedic and coatings are Biomaterials. The aim of this study was to construct nanohydroxyapatite micro particles using calcite, silica and zinc oxide using ball milling, powder, these three compounds, crushed and then molded into a cylindrical shape, pressed and put in oven a. The review ray diffraction X (XRD) suitable for milling, baking time and temperature samples obtained. The graph of the analysis of the samples was compared with HS. According to the results, the sample A with 10 hours of milling, temperature and heating time of 2 hours C˚ 1100, most of the other samples produced Hardstvnyt product
0

37
42


F.
Fardi Pour
BSc Student, Department of Electrical Engineering, Khomeinishahr Branch, Islamic Azad University, Isfahan, Iran
Iran


M.
Najafi Anaraki
BSc Student, Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Isfahan, Iran
Iran


M.
Karmian
Assistant Prof. , Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Isfahan, Iran.
Iran
mkarimian@iaukhsh.ac.ir
Hydroxyapatite nanoparticles
Ball milling
XRD
Hardstvnayt graph
[[1] خواص و کاربرد پزشکی بیومواد فلزی، فتحی/ محمدحسین مرتضوی/ وجیههالسادات، انتشارات ارکان دانش،1382.##[2]دکتر محمد حسین فتحی، خواص و کاربرد پزشکی بیوسرامیک ها، انتشارات ارکان دانش،1388.##[3] Lao L., Wang Y., Zhu Y., Zhang Y., Gao C., Poly(lactidecoglycolide)/hydroxyapatite nanofibrous scaffolds fabricated by electrospinning for bone tissue engineering, Journal of Materials Science: Materials in Medicine, vol. 22, No. 8, 2011, pp. 1873 – 1884.##[4] Hayati A.N., Hosseinalipour S.M., Rezaie H.R., Shokrgozar M.A., Characterization of poly (3hydroxybutyrate) / nanohydroxyapatite composite scaffolds fabricated without the use of organic solvents for bone tissue engineering applications, Materials Science and Engineering, vol. 32, No. 3, 2012, pp. 416–422.##[5] Zadegan S., Hosainalipour M., Rezaie H.R., Ghassai H., Shokrgozar M.A., Synthesis and biocompatibility evaluation of cellulose/hydroxyapatite nanocomposite scaffold in 1nallyl3methylimidazolium chloride, Materials Science and Engineering , vol. 31, No. 5, 2011, pp. 954–961.##[6] Beskardes I.G., Gumusderelioglu M., Bioact J., Biocompat, Biomimetic Apatitecoated PCL Scaffolds: Effect of Surface Nanotopography on Cellular Functions, Journal of Bioactive and Compatible Polymers, vol. 24, No. 6, 2009, pp. 507–524.##[7] Zreiqat H., Ramaswamy Y., Wu C., Paschalidis A., Lu Z., James B., The incorporation of strontium and zinc into a calcium–silicon ceramic for bone tissue engineering, Biomaterials, vol. 31 , No. 11 , 2010, pp. 3175 – 3184.## [8] Woodruff M.A., Hutmacher D.W., The return of a forgotten polymer—polycaprolactone in the 21st century, Progress in Polymer Science, vol. 35 , No. 10, 2010, pp. 1217–1256.##[9] Jose M.V., Thomas V., Johnson K.T., Dean D.R., Nyairo E., Aligned PLGA/HA nanofibrous nanocomposite scaffolds for bone tissue engineering, Acta biomaterialia, vol. 5, No. 1, 2009, pp. 305–315.##[10] Prabhakaran M.P., Venugopal J., Ramakrishna S., Nanostructured biocomposite substrates by electrospinning and electrospraying for the mineralization of osteoblasts, Acta biomaterialia, vol. 5, No. 11, 2009, pp. 28842893.##]
1

Check Ticcoated Tungsten Carbide Tool Wear in Machining Steel
http://jsme.iaukhsh.ac.ir/article_519159.html
1
In industrial production systems, including the most important factors in the economic field machining operations, reduce tool wear due to abrasive nature of the phenomenon on many factors, including temperature Lathe tool, influences, machining conditions (cutting speed, speed losses, forcing to rebuild parts of the manufacturing tolerances disassemble tool wear is caused by the phenomenon, as well as large sums to replace or sharpen this tool. In this study, an in vitro study done on tool wear SNMM120404 and the effect of parameters such as rotation speed of the spindle chuck, feed rate and depth of tool wear is investigated
0

43
47


M.
Karimian
Assistant Prof., Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Isfahan, Iran
Iran
m.karimian@iaukhsh.ac.ir


, E.
Mir Mohammad Sadeghi
Lecturer, Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Isfahan, Iran
Iran


M.
Mokhles Pour Esfahani
MSc Student, Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Isfahan, Iran
Iran
masihmokhlespour@yahoo.com


M.
badakhshian
MSc Student, Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Isfahan, Iran
Iran
Lathe
fluid shear stress
abrasion tool
round spindle
depth chip Level
[[1] الحافی،حسن،ماشین کاری های پیشرفته،دانشگاه صنعتی خواجه نصیرالدین طوسی،1390.##[2] گلکارپور. هانی، دهقانی. نریمان ، بررسی عمر ابزار با توجه به پارامترهای حرارت ، صافی.##[3] Derflinger V., Brandle H., Zimmermann H., New hard/lubricant coating for dry machining, Surface and Coatings Technology, vol. 113, No. 3, 1999, pp. 286–292.##[4] Sarma D.K., Dixit A., A comparison of dry and aircooled turning of grey cast iron with mixed oxide ceramic tool, Journal of Materials Processing Technology, vol. 190, No. 13 , 2007 , pp. 160172.##[5] Dhar N.R., Kamruzzaman M., Ahmed M., Effect of minimum quantity lubrication (MQL) on tool wear and surface roughness in turning AISI420B steel, Journal of Materials Processing Technology, vol. 172, No. 2, 2012, pp. 299304.##[6] Machado, A.R., Wallbank, J., The effect of extremely low lubricant volumes in machining, Wear, vol. 210, No. 1, 1997, pp. 7682.##[7] Xavior M.A., Adithan M., Determining the influence of cutting fluids on tool wear and surface roughness during turning of AISI 304 austenitic stainless steel, Journal of Materials Processing Technology, Vol. 209, No. 2, 2009, pp. 900909.##]
1

Modeling and Crackgrowth and Calculate First Intensity Factor with Ansys Software
http://jsme.iaukhsh.ac.ir/article_519160.html
1
Study about Fracture Mechanics and the root cause of fracture in order to estimates lifetime for Mechanical parts in designing process and manufacturing have tremendous role in this realm. Stress intensity factor comes into design which not only is dependent to geometry also extremely to load condition; for instance, it is important in failure processes (brittle and ductile Materials) or to predict rest life for a mechanical part under fluctuating stress. Stress intensity factor is separated from stress concentration factors. This dimensionless factor, is used to quantify how "concentrated" the stress is. Stress concentration factors are due to geometrical changes of cross sections and regardless of the load condition. At this article, concentrate on modeling and growing a crack during Tension Stress and calculate first stress intensity factor with Ansys software and compare the result with Westgard function
0

49
53


S.M.
Hossein Mirgilani
MSc Student, Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Isfahan, Iran
Iran
mir.gilani@gmail.com
Fracture mechanics
Stress intensity factor
Modeling and crackgrowth
[ [1] T.L. Anderson, Ph.D. Fracture Mechanics Fundamentals and Applications, Third Edition.##[2] Biao Wang, Mechanics of Advanced##Functional Materials.##[3] مگید، اس، ای، 1378، مکانیک شکست، فرهی، غ، چاپ سوم، انتشارات دانشگاه بوعلی سینا.##]
1

Analysis of Bending and Buckling of Circular Porous Plate Using FirstOrder Shear Deformation Theory
http://jsme.iaukhsh.ac.ir/article_519161.html
1
Porous materials are lightweight, flexible and resistant to hairline cracks, so today with the development of technology porous structure produced for use in various industries. This structure widely use in beams, plates and shells. The purpose of this paper is to investigate the effect of porosity in axial symmetry in bending and buckling load sheet for analysis. For this purpose, a circular plate with simply supported edges under uniform radial pressure and vertical pressure distribution is investigated. Mechanical properties of porous sheet are isotropic and variable in thickness direction is considered. Right movement is extended in accordance with the first order shear deformation theory. Then, using the principle of virtual work and applying the calculus of variations, differential equations, and equations for bending sheet stability are achieved, continue using these equations and Galerkin method, bending and buckling of the sheet is calculated. Buckling load is calculated for all types of porosity can be observed with increasing porosity, critical buckling load decreases. Buckling load is calculated for all types of porosity can be observed with increasing porosity, critical buckling load decreases. The distribution of bending stress and deflection analysis sheet was obtained. To verify the results of bending and buckling of the sheet, the results were compared with homogeneous sheet with classical theory.
0

55
62


A.R. Yadegari Naeini
Yadegari Naeini
MSc Student, Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Isfahan, Ir
Iran


A.
Ghasemi
Assistant Prof., Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Isfahan, Iran.
Iran
a_ghassemi@pmc.iaun.ac.ir
Porous material
A circle sheet
Bending
Elastic buckling
First Order Shear Deformation Theory
[[1] Benhart J. Manufactore, characterisation and application of cellular metals and metals foam, Progress in Materials Science, vol. 46, 2005, pp. 559632.##[2] Stasiewicz P., Magnucki K., Elastic buckling of a Pours beam, Theoretical and Applied Mechanics. vol. 140, 2008, pp. 287298.##[3] Magnucki K, Malinowski M., Bending and buckling of a rectangular porous plat, Steel and Composite Structures, vol. 6, No. 4, 2010, pp. 319328.##[4] Magnucki K., Malinowski M., buckling of a rectangular porous plate, Steel and Composite Structures, vol. 6, No. 4, 2010, pp. 405418.##[5] Jasion P., Magnucki M., Global and local buckling of a sandwich circular and beamrectangular plate with metal foam core, ThinWalled Structures, vol. 61, 2012, pp. 154161.##[6] Ma L.S., Wang T.J., Axisymmetric postbuckling of a functionally graded circular plate subjected to uniformly distribute radial compression, Materials Science Forum, vol. 423/425, 2013, pp.719–24.##[7] Magnucki B., Mathematical modelling of a rectangular sandwich plate with metal foam core, Journal of theoretical and applied mechanics, vol. 49, No. 2, 2013, pp. 439455.##[8] Belica T., Malinowski M., Magnucki K., Dynamic stability of an isotopic metal foam cylindrical shell subjected to external pressure and axial compression, Journal of Applied Mechanics, vol. 78, No. 4, 2014, pp. 04100310410038.##[9] Debowski D., Magnucki K., Malinowski M., Dynamic stability of a metal foam rectangular plate, Steel and Composite Structures, vol. 10, No. 2, 2012, pp. 151168.##[10] Choi J.B., Lakes R.S., Analysis of elastic module of conventional foams and of reentrant foam materials with a negative Poisson's ratio, International Journal of mechanic science, vol. 37, 2005, pp. 5159.##[11] Volmir A.S., stability of deformation system, 2007, Nauka: Moscow.##]