ORIGINAL_ARTICLE
Modified Fixed Grid Finite Element Method to Solve 3D Elasticity Problems of Functionally Graded Materials
In the present paper, applicability of the modified fixed grid finite element method in solution of three dimensional elasticity problems of functionally graded materials is investigated. In the non-boundary-fitted meshes, the elements are not conforming to the domain boundaries and the boundary nodes which are used in the traditional finite element method for the application of boundary conditions no longer exist. Therefore, special techniques are needed for computation of the stiffness matrix of boundary intersecting elements and application of boundary conditions.The stiffness matrix of boundary intersecting elements are calculated via integration of strain energy over the internal parts of these elements. Essential boundary conditions are applied using penalty function method. To examine the effectiveness of the proposed method, some numerical examples are solved and results are compared with those obtained using the standard finite element method.
http://jsme.iaukhsh.ac.ir/article_515473_4570054acfa91078212ab210aa2dc1dd.pdf
2008-12-21
1
10
Modified fixed grid finite element method
Non-boundary-fitted meshes
Three dimensional elasticity analysis
Functionally Graded Materials
M. J.
Kazemzadeh-Parsi
mjk@iaushiraz.net
1
Assistant Professor, Mechanical Engineering Department, Islamic Azad University, Shiraz Branch
LEAD_AUTHOR
F.
Daneshmand
2
Associate Professor, Mechanical Engineering Department, Shiraz University
AUTHOR
[1] Reddy J.N., An introduction to the finite
1
element method, 2nd Ed., McGraw-Hill, New
2
York, 1993.
3
[2] Thompson J.F., Soni B.K. and Weatherill N.P., Handbook of grid generation, CRC press, New York, 1999.
4
[3] Belytschko T., Krongauz Y., Organ D., Fleming M. and Krysl P., Meshless methods: An overview and recent developments, Computer Methods in Applied Mechanics and Engineering, Vol. 139, 1996, pp. 3-47.
5
[4] Liu G.R., Mesh free methods: moving beyond the finite element method, CRC Press, New York, 2003.
6
[5] Garcia M.J. and Steven G.P., Fixed grid finite elements in elasticity problems, Engineering Computations, Vol. 16, 1999, pp. 145-164.
7
[6] Garcia M.J., Ruiz O.E. and Henao M.A., Fixed grid finite element analysis for 3D structural problems, International Journal of Computational Methods, Vol. 22, 2004.
8
[7] Kim H., Garcia M.J., Querin O.M., Steven G.P. and Xie Y.M., Fixed grid finite element analysis in evolutionary structural optimization, Engineering Computations, Vol. 17, 2000, pp. 427-439.
9
[8] Garcia M.J. and Gonzalez C.A., Shape optimization of continuum structures via evolution strategies and fixed grid finite element analysis, Journal of structural and multidisciplinary optimization, Vol. 26, 2004, pp. 92-98.
10
[9] Birman V. and Byrd L.W., Modeling and Analysis of Functionally Graded Materials and Structures, Applied Mechanics Reviews, Vol. 160, 2007, pp. 195-216.
11
[10] دانشمند ف.، فرید م. و کاظم زاده پارسی م.ج.، روش اصلاح شده المان محدود شبکه ثابت در تحلیل مسائل دو بعدی ارتجاعی خطی، مجله علمی پژوهشی استقلال، دانشگاه صنعتی اصفهان، سال 27، شماره 2، اسفند 1387، صص103 – 122.
12
[11] کاظم زاده پارسی م.ج.، دانشمند ف. و فرید م.، روش اصلاح شده المان محدود شبکه ثابت و کاربرد آن در حل مسائل سه بعدی ارتجاعی خطی، مجموعه مقالات سیزدهمین کنفرانس مهندسی مکانیک ایران، دانشگاه صنعتی اصفهان، اصفهان، 1384.
13
[12] Daneshmand F. and Kazemzadeh-Parsi M.J., Static and dynamic analysis of 2D and 3D elastic solids using the modified FGFEM, Finite Elements in Analysis and Design, Vol. 45, 2009, pp. 755-765.
14
[13] Bensoe M. and Kikuchi N., Generating optimal topologies in structural design using a homogenization method, Computer Methods in Applied Mechanics and Engineering, Vol. 71, 1988, pp. 197-224.
15
ORIGINAL_ARTICLE
Nonlinear Vibration Analysis of Embedded Multiwalled Carbon Nanotubes in Thermal Environment
In this article, based on the Euler-Bernoulli beam theory, the large-amplitude vibration of multiwalled carbon nanotubes embedded in an elastic medium is investigated. The method of incremental harmonic balance is implemented to solve the set of governing nonlinear equations coupled via the van der Waals (vdW) interlayer force. The influences of number of tube walls, the elastic medium, nanotube aspect ratio and temperature rise on nonlinear frequency are fully examined. The results obtained for single-walled, double-walled and triple-walled carbon nanotubes indicate that with increasing the number of tube walls, coefficient of the surrounding elastic medium, tube aspect ratio and temperature nonlinear frequency tend to the linear counterpart.
http://jsme.iaukhsh.ac.ir/article_515474_860a15186c9cf97c3ac8d644b9fc07f6.pdf
2008-12-21
11
18
Carbon nanotubes
van der Waals (vdW) interlayer force
Incremental harmonic balance
Nonlinear frequency
Reza
Ansari
guilan.ac.ir@r_ansari
1
Assistant Professor, Mechanical Engineering Department, Guilan University
LEAD_AUTHOR
Habib
Ramezan Nejad
2
M.Sc., Mechanical Engineering Department, Guilan University.
AUTHOR
[1] Iijima S., Helica microtubes of graphitic carbon, Nature, 354, 1991, 56-58.
1
[2] Fu Y.M., Hong J.W., Wang X.Q., Analysis of nonlinear vibration for embedded carbon nanotubes, J. Sound and Vibration, Vol. 296, 2006, pp. 746–756.
2
[3] Wang C.M., Tan V.B.C., Zhang Y.Y.,
3
Timoshenko beam model for vibration analysis of multi-walled carbon nanotubes, J. Sound and Vibration, Vol. 294, 2006, pp.1060–1072.
4
[4] Lu Y. J., Wang X, 2006, combined torsional buckling of multi-walled carbon nanotubes. J. Phys D, Vol.39, pp. 3380–3387.
5
[5] Wang X., Lu G., Lu Y.J., Buckling of embedded multi-walled carbon nanotubes under combined torsion and axial loading, Int J. Solids and Structures, Vol. 44, 2007, 336–351.
6
[6] Hsu Jung-Chang, Chang Ruo-Ping, Chang Win-Jin, Resonance frequency of chiral single-walled carbon nanotubes using Timoshenko beam theory, J. Physics Letters A, Vol. 372, 2008, pp.2757–2759
7
[7] Wang L., Ni Q., Li M., Qian Q.,The thermal effect on vibration and instability of carbon nanotubes conveying fluid, Physica E, Vol. 40(10), 2008, pp. 3179-3182.
8
[8] Hahn H.T., Williams J.G., Compression failure mechanisms in unidirectional composite, J. Composite Materials Testing and Design, Vol.7, 1984, pp.115–139.
9
[9] Jones J.E., The determination of molecular from the variation of the viscosity of a gas with temperature, Proc. Roy. Soc. 106A, 1924,441.
10
[10] Girifalco L.A., Lad R.A., Energy of cohesion, compressibility, and the potential energy function of graphite system, J. Chemical Physics, 195,Vol.25, pp.693–697.
11
ORIGINAL_ARTICLE
Free Vibration Analysis of FGM Cylindrical Shell with Supported Ring Based on Reddy Model under Clamped Boundary Condition
In this paper a study on the vibration of thin cylindrical shells with ring supports and made of functionally graded materials (FGMs) composed of stainless steel and nickel is presented. The properties are graded in the thickness direction according to a volume fraction power-law distribution.The cylindrical shells with ring supports which are arbitrarily placed along the shell and impose zero lateral deflections. The study is carried out based on third order shear deformation shell theory (T.S.D.T). The analysis is carried out using Hamilton’s principle. The governing equations of motion of FGM cylindrical shells are derived based on shear deformation theory. Results are presented on the frequency characteristics, influence of ring support position and the influence of clamed-clamped boundary conditions.
http://jsme.iaukhsh.ac.ir/article_515475_04538ceb01a8f43ef19f2c8c84303a88.pdf
2008-12-21
19
30
Vibration
FGM
Cylindrical shell
Ring
Hamilton's principle
M. R.
Isvandzibaei
isvandzibaei@iauandimeshk.ac.ir
1
Assistant Professor, Mechanical Engineering Department, Guilan University Ph.D. Student in Mechanical Engineering, Faculty member of, Islamic Azad University, Andimeshk Branch
LEAD_AUTHOR
M.
Salmanzadeh
2
Faculty Member of Mechanical Engineering, Islamic Azad University, Shushtar Branch
AUTHOR
R.
Mosavifar
3
Faculty Member of Mechanical Engineering, Islamic Azad University, Izeh Branch
AUTHOR
[1] Loy C.T., Lam, K.Y., Vibration of Cylindrical Shells with Ring Support, J. impact Engineering, 1996, Vol. 35, pp.455-463.
1
[2] Xiang Y., Kitipornchai S., Lim C.W., Lau C.W.H., Exact solutions for vibration of cylindrical shells with intermediate ring supports, Int. J. Mechanical Sciences, Vol. 44(9),2002, pp.1907-1924.
2
[3] Patel B.P., Gupla S.S., Moknath M.S., Free Vibration analysis of FGM elliptical cylindrical shells, Composite structures, Vol. 69(3), 2004, pp. 259-270.
3
[4] Loy C.T., Lam K.Y., Reddy J.N., Vibration of functionally graded cylindrical shells. J. Mechanical Sciences, Vol.41 (3), 1999, pp. 309-324.
4
[5] Chen Q.W., Bian Z.G., Ding D.H., Three dimensional vibration analysis of fluid-filled Orthotropic FGM Cylindrical Shell. Journal of Mechanical Sciences, Vol 46, 2004, pp. 159-162.
5
[6] Prandhan S.C., Log C.T., Lam K.Y., Reddy J.N., Vibration Characteristics of FGM Cylindrical Shells under Various Boundaries. Applied an Acoustics, 2000, Vol. 61, pp.117-126.
6
[7] Liew K.M., Kitipornchai S., Zhang X.Z., Analysis of the Thermal Stress Behavior of Functionally Graded Hollow Circular Cylinders. J. Functional Materials, 1994, Vol 25, pp. 452-465.
7
[8] Sofiger A.H., Schanck E., The Stability of FG cylindrical shells under linearly increasing dynamic torsional loading, Engineering Structures, Vol. 26, 2004, pp.1323-1326.
8
[9] Gong S.W., Lam K.Y., Reddy, J.N. The elastic response of FGM cylindrical shells low-velocity. J Impact Engineering, Vol.22 (4), 1999, pp. 397-417.
9
[10] Naeem M.N., Arshad S.H., The Ritz formulation applied to the study of the vibration frequency characteristics of functionally graded circular cylindrical shells, J. Mechanical Engineering Science, Vol. 224,Part C, , 2009, pp. 43-54.
10
[11] Mumtaz A., Muhammad N., Vibration Characteristics of Rotating FGM Circular Cylindrical Shells Using Wave Propagation Method. European Journal of Scientific Research, Vol. 36 ,No.2, 2009, pp.184-235.
11
[12] Najafizadeh M.M., Isvandzibaei M.R., Vibration of functionally graded cylindrical shells based on higher order shear deformation plate theory with ring support. Acta Mechanica, Vol 191, 2007, pp. 75-91.
12
[13] Soedel W., Vibration of shells and plates, Marcel Dekker, INC, New York, USA, 1981.
13
[14] Warburton G. B., Vibration of thin
14
cylindrical shells, J. Mechanical Engineering Science, Vol. 7, 1965, pp. 399-407.
15
[15] Loy, C.T. Lam, K.Y. Reddy J.N., Vibration of functionally graded cylindrical shells. Int. J. Mechanical Sciences, Vol. 41, 1999, pp. 309-324.
16
ORIGINAL_ARTICLE
Influence of EDM Characteristic Parameters on the Surface
Microstructure in CK45 Alloy Steel
Electro Discharge Machining (EDM) is a very efficient machining process widely used in manufacturing components of complicated geometry. Based on its nature, i.e. material removal by electric discharge, the process induces thermal stresses that in turn result in generation of wide spread micro-cracks on the surface of the machined part. In this paper the influence of EDM characteristic parameters on the surface microstructure in CK45 alloy steel which is suitable for manufacturing of forging dies has been extensively investigated. An extensive experimental programme has been carried out to explore the role of various EDM parameters on the quality of the machined surface. The relation of EDM parameters has been evaluated quantitatively using the test results and regression analysis. Predicting the impact of EDM parameters on the surface quality as the outcome of this study provides means to appropriately decide on the adjustment of parameters to their optimum values and achieve the desired die surface quality at reasonable manufacturing time and cost.
http://jsme.iaukhsh.ac.ir/article_515476_2c2578ca1a095450f6c291fc38431239.pdf
2008-12-21
31
40
Surface micro-cracks
Surface Roughness
EDM Machining
CK45 Steel
EDM
parameters
S.
Abedpour
1
M.Sc., Manufacturing Department, Islamic Azad University, Shiraz Branch.
AUTHOR
E. i
Jafar
2
Assistant Professor, Metallurgy Department, Islamic Azad University, Branch
AUTHOR
A.
Afsari
afs@iaushiraz.net
3
Assistant Professor, Manufacturing Department, Islamic Azad University, Shiraz Branch
AUTHOR
S.
Hadidi Mood
hadidi@um.ac.ir
4
Assistant Professor, Mechanical Engineering Department, Ferdosi University.
LEAD_AUTHOR
[1] McGeough J. A., Advanced Methods of Machining, First edition, Chapman and Hall, USA, 2000.
1
[2] Kruth J. P., Stevens L., Froyen L. and Lauwers B., Study on the white layer of a surface machined by die sinking electro-discharge machining, Annals of the CIRP Vol. 44 (1), 1995, pp. 169–172.
2
[3] Ekmekci B., Elkoca O., Tekkaya A. E. and Erden A., Observations on cracking behavior of micro alloy steel in electric discharge machiningEDM, 10th International Conference on Machine Design and Production, Cappadocia, Turkey, 2002.
3
[4] Guu Y. H, AFM surface imaging of AISI D2 tool steel machined by the EDM process, Applied Surface Science, Vol 242(3-4), 2005, pp. 245–250.
4
[5] Manoj Kumar B. V., Ramkumar J., Basu B. and Kang S., Electro-discharge machining performance of Ti CN-based cermets, Int. J. Refractory Metals & Hard Materials, Vol. 25 , 2007, pp. 293–299.
5
[6] Bringas J. E, Handbook of comparative world steel standards, 2nd ed., (ASTM data series. DS 67A), USA, 2008.
6
[7] Descoeudres A., Characterization of electrical discharge machining plasmas, PhD thesis, Mechanical and Mechatronic Engineering, University of Lausanne, EPFL, 2006.
7
8
ORIGINAL_ARTICLE
A Roll Wear Prediction Model in Hot Plate Rolling
In this paper, the wear of work roll in hot plate rolling is introduced and the parameters affecting wear mechanisms in hot strip mill are investigated. In addition, different wear mechanisms in hot rolling and the differences between these mechanisms in different stands are explained. Using the finite element method and the rolling equations, a work roll wear model is proposed. Wear is modeled using the resultant pressure distribution along the roll barrel. To obtain the tentative coefficient, summation of wear in each pass schedule is obtained and calibrated via actual wear of samples tested in the Mobarakeh Steel Company. Finally, the theoretical wear values are compared with those of the experiment. The predicted wear profiles are found to be in good agreement with those of the experimental measured values.
http://jsme.iaukhsh.ac.ir/article_515481_5bc1dd30a7993c896e0ad47354d37a93.pdf
2008-12-21
41
54
Finite Element Modeling
Hot rolling
Wear profile
Force distribution
A.
Nourani
1
M.Sc., Mechanical Engineering Faculty, Isfahan University of Technology.
AUTHOR
M.
Salimi
salimi@cc.iut.ac.ir
2
Professor, Mechanical Engineering Faculty, Isfahan University of Technology
LEAD_AUTHOR
[1] Burwell J.T., Survey of possible wear mechanisms, Wear, Vol. 1, 1957, pp. 119-141.
1
[2] Sachs G., Latorre J.V., Roll Wear in Finishing Trains of Hot Strip Mills, J. Iron & Steel Eng., No. 12, 1961, pp. 71.
2
[3] Tong K.N., Chakko M.K., Predictions of Roll Spalling in 4-High Mills Based on Fatigue Strength of Roll Materials and Wear Pattern of Rolls, AISE Yearly Proceedings, 1964, pp. 539-569.
3
[4] Oike Y., Tetsu-to-Hagane J., Iron & Steel Inst, Vol. 63 No. 4, 1977, p.S222 (in Japanese).
4
[5] Nakanishi T., Application of Work Roll Shift Mill HCV Mill to Hot Strip and Plate Rolling, Hitachi Review, Vol. 34 No. 4, 1985, pp.153-160.
5
[6] Ginzburg V.D., Profile and Flatness of Flat Rolled Products, New York, 1989, pp. 24-171.
6
[7] Williams R.V., Boxall G.M., Roll Surface Deterioration in Hot Rolling Mill, J. Iron Steel Inst., Vol. 203, 1965, pp. 367-377.
7
[8] Schey J.A., Tribology in Metalworking. Friction, Lubrication and Wear, American Society for Metals, Metals Park, Ohio, 1983, pp. 131-341.
8
[9] Pellizzari M., Molinari A., Straffelini G., Tribological behaviour of hot rolling rolls, Wear, Vol. 259, 2005, pp. 1281-1289.
9
[10] Shaughnessy R.N., J. Iron Steel Inst., Vol.
10
206, 1968, pp. 981-986.
11
[11] Shiraiwa T., Matsuno F., Taghashira H., Tetsu-to-Hagane, J. Iron & Steel Inst, Vol. 57, 1971, pp.131-145.
12
[12] Toda K., Imai, I., Inui R., Proc. Conf. Sci. Tech. Iron Steel, Iron Steel Inst., Japan, Tokyo, 1971, pp. 736-739.
13
[13] Melfo W.M.C., Analysis of Hot Rolling Events that Lead to Ridge-Buckle Defect in Steel Strips, PhD thesis, School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Australia, 2006.
14
[14] Jonsson M., TM-Rolling of Heavy Plate and Roll Wear, Licentiate thesis, Department of Applied Physics and Mechanical Engineering, Division of Material Mechanics, Luleå University of Technology, Sweden, 2006.
15
[15] Jonsson M., FEM-Simulation on the Influence of Roll Wear on Roll Force Prediction with CVC-Rolls, Department of Applied Physics and Mechanical Engineering, Division of Material Mechanics, Luleå University of Technology, Sweden, May 2004.
16
[16] Ginzburg V.B., steel rolling technology, New York, 1985.
17
ORIGINAL_ARTICLE
A Comparative Study Between Analytical, Finite Element Method and
the Experimental Results in Wire Drawing of Copper
The wire drawing process is extensively used in manufacturing components such as rivet, screw, welding wire, etc. In this work, an analytical of the wire drawing process has been considered for two-stage operation. ABAQUS commercial Finite Element code has been used to obtained the drawing force. Then, The analytical and experimental results been compared. The results show a good agreement for copper.
http://jsme.iaukhsh.ac.ir/article_515484_b6833660e64ed098de0e923654ff4cda.pdf
2008-12-21
55
62
Wire Drawing
Drawing Force
Finite element method (FEM)
Mohamad
Ahmadpour
1
M.Sc., Lecture, Mechanical Enegineering Faculty, Islamic Azad University, Khomeinishahr Branch
AUTHOR
Hassan
Khademyzadeh
khademizadeh@ iaukhsh.ac.ir
2
Assistant Professor, Mechanical Enegineering Faculty, Islamic Azad University,Assistant Professor, Mechanical Enegineering Faculty, Islamic Azad University, Khomeinishahr Branch. Branch.
LEAD_AUTHOR
[1] Mellor P.B., Johnson W., Engineering Plasticity, Van Nostrand Reinhold Company, London, 1972.
1
[2] Prager W., Hodge P.G., A New Theory of Plastic Solids, Chapman and Hall, London, 1951.
2
[3] Draker D.C., Green berg W., 1951, The safety factor of an elastic-plastic body in plane strain, J. Applied Mechanics, Trans. ASME, Vol. 73, 1951, pp. 371-378.
3
[4] Hill J., 1950, Mathematical theory of plasticity, Oxford University Press, London
4
[5] Mac Lellian, G.D.S., Some friction effects in wire drawing, T. Inst-Metal, 1953, Vol. 81, pp.1-13.
5
[6] Majors H.J.R., 1955, Studies in cold drawing, Trans. ASME, Vol. 78, pp. 79.
6
[7] Atkins A.G., Caddell R.M., 1968, The influence of reduction work when drawing rod through conical dies, J. Int. Mesh. Sci., Vol. 10, pp. 15.
7
[8] Sawamiphakdi K., Kropp P.K., Lahoti G.D., 1988, Investigation of residual stress in drawn wire by the finite element method, Trans. ASME., Vol. 8, pp. 117-122.
8
[9] Mathur K.K., Dawson P.R., 1990, Texture development during wire drawing, J. Eng. Mater Tech. Trans. ASME., Vol. 112, N. 3, pp. 292-297.
9
[10] Masao M., Masahiko J., 2001, The utility of radially and ultrasonically vibrated dies the wire drawing process, J. Mater. Tech. 113, pp. 81-86.
10
[11] Hayashi M., Masahiko J., Simulation of ultrasonic-vibration drawing using the finite element method (FEM), J. Mater. Tech. Vol. 140, 2003, pp. 30-35.
11
[12] Tiernan P., Hillery M.T., Dieless wire drawing an experimental and numerical analysis, J. Mater. Tech. 155-156, 2004, pp. 1178-1183.
12
[13] Rubio E.M., Camacho A.M., Calculation of the forward tension in drawing processes, J. Mater. Tech. 162-163, 2005, pp. 551-557.
13
[14] Norasethasopon S., Yoshida K., Influences of
14
inclusion shape and size in drawing of copper shaped-wire, J. Mater. Tech.172, 2006, pp. 400-406.
15
[15] Bubnovich V.I., Vivancos Calvet J., Gonzalez Rojas H. A., A new analytical solution for prediction of forward tension in the drawing process, J. Material Technology, Vol. 198, 2008, pp. 93-98.
16
[16] Majzoobi G.H., Fereshteh Saniee F.,
17
investigations into the effect of redundant shear deformation in bar drawing, J. Mater. Tech. Vol. 201, 2008, pp. 133-137.
18
[17] تویسرکانی ح.، 1381، شکلدهی فلزات، مرکز نشر دانشگاه صنعتی اصفهان، دانشگاه صنعتی اصفهان.
19
[18] Chakrabarty J., Applied Plasticity, Springer, New York, 2010.
20
ORIGINAL_ARTICLE
Identification of Crack Location and Depth in a Structure by
GMDH- type Neural Networks and ANFIS
The Existence of crack in a structure leads to local flexibility and changes the stiffness and dynamic behavior of the structure. The dynamic behavior of the cracked structure depends on the depth and the location of the crack. Hence, the changes in the dynamic behavior in the structure due to the crack can be used for identifying the location and depth of the crack. In this study the first three natural eigenfrequencies of a cantilever beam having a transverse open crack have been computed for 10 different depths and 30 different locations by the finite element method. These natural eigenfrequencies have been used as input data for GMDH-type neural networks and adaptive neuro-fuzzy inference system, ANFIS, for crack location and depth modeling.
http://jsme.iaukhsh.ac.ir/article_515485_a13b2b43c4522bb9ec41e7b0ebb8831e.pdf
2008-12-21
63
76
Natural frequency
Neural Networks
GMDH
ANFIS
SVD
M.
Darvizeh
1
Professor, Mechanical Engineering Department, Guilan University
AUTHOR
N.
Narimanzadeh
2
Professor, Mechanical Engineering Department, Guilan University
AUTHOR
A.
Malihi
3
M.Sc., Mechanical Engineering Department, Guilan University
AUTHOR
M.
Javadzadeh
4
M.Sc., Mechanical Engineering Department, Guilan University
AUTHOR
R.
Ansari
r_ansari@guilan.ac.ir
5
Assistant Professor, Mechanical Engineering Department, Guilan University
LEAD_AUTHOR
[1] Vandiver J., Detectionof Structural Failure on Fixed Platforms by Measurement of Dynamic Response, Proc. of the 7th Annual Offshore Tech. Conf, 1975, pp. 243–252.
1
[2] Gounaris G., Dimarogonas A., A Finite element of a cracked prismatic beam in structural analysis Computers and Structures, 1988, Vol.28, pp. 309-313.
2
[3] Inagaki V., Kanki T., Transverse vibrations of a general cracked rotor bearing system , Mechanical Design (ASME), 1981, Vol. 104, pp. 1-11.
3
[4] Leung P., The effects of a transverse Crack on the dynamics of a circular shaft, Rotordynamics’92 International Conference on Rotating Machine Dynamics, 1992.
4
[5] Shim M. B., Suh M. W., Crack identification of a planar frame structure based on a synthetic artificial intelligence technique, Int. J. for numerical methods in engineering, Vol.57, 2003, pp. 57-82,
5
[6] Ariman-Zadeh A., Darvizeh A., Ahmad-Zadeh V., Hybrid genetic design of GMDH-type neural networks using singular value decomposition for modeling and prediction of the explosive cutting process, J. of Engineering manufacture Proceedings of the I MECH E Part B, Vol. 217, 2003, pp. 779 -790.
6
[7] Lee C., Fuzzy Logic in Control Systems. Fuzzy Logic Controller, IEEE Transacation on Systems,Man and Cybernetics, Vol.22(5), pp. 1033-1046, 1990.
7
[8] Kosko B., Fuzzy Systems as universal approximator, IEEE Transaction on Computer, Vol43(11), 1994, pp.1327-1333.
8
[9] Porter B., Nariman-Zadeh N. , Genetic Design of Computed Torque Controllers for Robotic Manipulators, Proc. IEEE.Int. Symp. Intelligent Control, 1995.
9
]10[ براتی م. ، طراحی سیستمهای فازی جهت مدلسازی رفتار ارتعاشی پوسته های چند لایه مرکب با استفاده از ترکیبی از روش تجزیه مقادیر منفرد و تندترین شیب، دانشگاه گیلان، پایان نامه کارشناسی ارشد،1381.
10
[11] Golub G.H., Reinesh C., Singular value decomposition and least squares solutions, Numer. Math., Vol. 14(5), 1970, pp. 403-420.
11
[12] Nariman-zadeh N., Darvizeh, A., Darvizeh M., Gharababaei H., Modelling of explosive cutting process of plates using GMDH-type neural network and singular value decomposition. J. Materials Processing Technology, Vol. 128, No. 1-3, 2002,
12
pp. 80-87.
13
[13] Ivakhnenko A.G., Polynomial theory of complex system, IEEE Trans. Syst. Man & Cybern, SMC-1, 364-378, 1971.
14
ORIGINAL_ARTICLE
Prediction of Work-Piece Constitutive Equation
in Hot Rolling of Strip
Dimensional control of the work-piece in steel industry is of important interest. The main aspects in overcoming the thickness control are variations in material strength due to variations in chemical composition, work-piece temperature, reduction and the strain rate applied to the work-piece. In this paper based on the main parameters affecting the rolling force an attempt been made to give a more accurate prediction for the flow stress in a steel rolling finishing mill. Predicted values of the model are compared with those of the experimental values which are shown to be in good agreements
http://jsme.iaukhsh.ac.ir/article_515493_7867ed9812525ef887ffe18d40be380a.pdf
2008-12-21
77
84
Flow stress
Hot rolling
Least square fitting
Constitutive equation
Sahar
Salimi
1
M.Sc. Student, Chemical and Materials Engineering Department, University of Alberta, Edmonton, Canada.
AUTHOR
Samira
Salimi
2
M.Sc. Student, Mechanical Engineering Department, University of Calgary, Calgary, Canada.
AUTHOR
Amir H.
Adibi-Sedeh
amir.h.adibi@spiritaero.com
3
Assistant Professor, Dept. of Industrial and Manufacturing Engineering, Wichita State University, Wichita, Kansas, USA
LEAD_AUTHOR
[1] Anderson J.G., Evans R.W., Modeling flow stress evolution during elevated temperature deformation of two low carbon steels, Iron making and Steelmaking, Vol. 23(2) 1996, pp. 130-135.
1
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