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Research on Force Simulation of Rolls' Deformation in the Rolling Process of Medium and Heavy Plate Leveler Xiaogang Wang a Xiangnan Li b Qingxue Huang c School of Material Science and Engineering, Taiyuan University of Science and Technology, China, Shanxi, Taiyuan 030024 a wxg_158@sina.com bdaosheng54321@163.com Keywords: medium thick plate; straightening; deformation of rolls Abstract.During many factors affect the straightening precision, the shape of roller gap affect directly the flatness and the distribution of residual stress; At the same time, roll system's stiffness, as an important part of the roller leveler's whole stiffness, affect directly the design of leveling production process.
Activities beams material is Q345, the elasticity module is 211000Mpa, Poisson's ratio is 0.3; The materials of straightening rollers and supporting rollers is 60CrMoV forged steel, with the elasticity module of 221000Mpa, Poisson's ratio is 0.3; rollers box material is cast steel, the elasticity module is 175000Mpa, Poisson's ratio is 0.3.
References [1] Yuli Liu,Mike Levick.Investigation Into the Effects of Leveling Roll Diameter Variation on Coupling Shear Pin Breakage of a Hot Plate Leveler,Iron & Steel Technology,2009,6(8):82-88 [2] Kazunari,Yoshida,Tsuyoshi,Sugiyama.Analysis of the straightening of drawn wires using rollers by the Finite-Element Method (FEM), Wire Journal International,2009,42(5):52-56 [3] P.A.Eggertsen,K.Mattiasson.On the modelling of the bending-unbending behaviour for accurate springback predictions, International Journal of Mechanical Sciences,2009,51 (7):547-563 [4] M.E.Kassner,P.Geantil,L.E.Levine.Backstress.The Bauschinger Effect and Cyclic Deformation, Materials Science Forum, 2009, 604/605:39-51 [5] Wilhelm Guericke.
Material Model Describing Cyclic Elastic-Plastic Deformation of Roller Leveling and Straightening Processes, Steel Research, 2009,80(4):281-287

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[6] M.ERDOGAN, “The effect of new ferrite content on the tensile fracture behavior of dual phase steels”, Journal of Materials Science, Vol.37, 2002, p.3623~3630
[8] R.O.Rocha, T.M.F.Melo, E.V.Pereloma, D.B.Santos, “Microstructure evolution at the initial stages of continuous annealing of cold rolled dual phase steel”, Materials Science and Engineering A, Vol.391, 2005, p.296~304
[10] M.ERDOGAN, “The effect of new ferrite content on the tensile fracture behaviour of dual phase steels”, Journal of Materials Science, Vol.37, 2002, p.3623~3630

The fatigue life of the solution annealed and cold stretched materials is predicted by the model and the prediction results are in good agreement with the experimental results.
The life of the cold-stretched materials increases with the increasing of cold stretching level (e), which is certainly longer than the life of the solution-annealed material.
An empirical life prediction method Hull-Rimmer (H-R) theory is based on the interaction of fatigue-creep of materials under high temperature, that is, the process contains loading and load holding.
Acknowledgments The author gratefully acknowledges the support of National Natural Science Foundation of China (No.51405249), Zhejiang Provincial Natural Science Foundation of China (No.LQ14E050002) and Ningbo Municipal Natural Science Foundation of China (No.2014A610050) References [1] Manson S S, Halford G R, Hirschberg M H.
Journal of mechanical engineering, 2015; 51:57-62

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Figure 4 shows an overview of the brittle fracture material model of the glass material [6, 7].
Therefore, as per the damage theory and granular material theory of a fractured material, the stiffness of a material would degrade [9].
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Many bio-based materials can use IFF instead of traditional carbon sources (such as starch, cellulose, niacin, ring and alcohol (CD).
Experimental Materials and Methods Raw Materials.
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To prevent short, the backing should be covered well with insulating material.
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McEvily 2,b 1Department of Mechanical System Engineering, Hiroshima Institute of Technology ,2-1-1,Miyake, Saeki-ku,Hiroshima,731-5193,Japan, 2 Department of Metallurgy and Materials Engineering, The University of Connecticut, 97 North Eagleville Road, Storrs, Ct.06269-3136,,UU..SS..AA..
Introduction Ever since the time of Gough and Sopwith [1], a large number of papers has been published on the effect of the environment on the fatigue behavior of structural materials, including aluminum alloys.
Today it is well known that the fatigue strength of most structural materials is affected by oxygen and by the relative humidity of the air test environment.
Experimental procedures The material investigated was the commercial 7075-T6 aluminum alloy in sheet form.
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Materials According to the requirement of the study, daily mean discharges were collected from the Caoping station from 1971 through 2000.
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The type of material used remained unchanged as well as the component thickness.
Acknowledgment The authors would like to acknowledge the Ministry of Science, Technology and Innovation, Malaysia (MOSTI) for funding this research under the Science Fund (Project Grant No: 03-01-01-SF0269).
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