Research activities of computer-aided materials processing laboratory

• Autorzy: Im Y. T. , Lee H. W. , Lee H. C. , Awais M. , Jin Y. G. , Jung K. H. , Jung K. H.
• Języki publikacji: EN

Abstrakty

EN

Purpose: of this paper is to review the research works carried out at the national research laboratory for computer-aided materials processing at the department of mechanical engineering at KAIST. Design/methodology/approach: The research papers published so far from the laboratory were carefully reviewed and highlights for developing simulation tools for mesh generation, 2D or 3D finite element analyses for forging, shape rolling, solidification, semi-solid forging, compression molding of thermoset composites, injection molding without or with short fibers, and expert system for multi-stage axi-symmetric cold forging, extrusion, and multi-pass shape rolling are recaptured. Findings: According to this survey, the important issues involved with program developments and their industrial applications were revisited. Research limitations/implications: Understanding of material behaviour at various processing conditions and characterization of proper boundary conditions in terms of friction and temperature should be carefully made. Handling of complex geometry and computational efficiency for such geometry should be improved as well. Further development of three dimensional design systems should be necessary. Practical implications: Proper usage of the simulation tools and interface such tools with the automatic design system with the help of artificial intelligence will be very useful at the design stage of new manufacturing products and processes. In addition, proper understanding of deformation mechanics is of importance to properly utilize such numerical tools. Originality/value: Various aspects of limitations involved with program developments and their usage are identified and some important industrial applications demonstrated.

Słowa kluczowe

EN

numerical techniques; computational materials science; computational mechanics; plastic forming; heat treatment

PL

techniki numeryczne; komputerowa nauka o materiałach; mechanika komputerowa; formowanie plastyczne; obróbka cieplna

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 24, nr 1
• Strony: 219--229
• Opis fizyczny: Bibliogr. 80 poz., fot., rys.

Twórcy

autor

Im Y. T.

autor

Lee H. W.

autor

Lee H. C.

autor

Awais M.

autor

Jin Y. G.

autor

Jung K. H.

autor

Jung K. H.

• Department of Mechanical Engineering, Korea Advanced Institute, National Research Laboratory for Computer Aided Materials Processing of Science and Technology, 373-1 Gusongdong, Yusonggu, Daejeon, 305-701, Korea,

Bibliografia

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• [4] Y.T. Im, S. Kobayshi, Finite Element Analysis of Plastic Deformation of Porous Materials, Metal Forming and Impact Mechanics (Edited by S.R. Reid), Pergamon Press, Oxford (1985) 103-122.
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• [9] Y.T. Im, S.H. Kang, J.S. Cheon, Finite Element Investigation of Friction Condition in a Backward Extrusion of Aluminum Alloy, Trans. ASME, Journal of Manufacturing Science and Engineering 125 (2003) 378-383.
• [10] Y.T. Im, S.H. Kang, J.S. Cheon, A Novel Technique of Friction and Material Property Measurement by Tip Test in Cold Forging, Proceedings of the Institution of Mechanical Engineers part B Journal of Engineering Manufacture 220 (2006) 81-90.
• [11] S.H. Kang, J.H. Lee, J.S. Cheon, Y.T. Im, The Effect of Strain-Hardening on Frictional Behavior in Tip Test, International Journal of Mechanical Sciences 46 (2004) 855-869.
• [12] S.Y. Kim, Y.T. Im, Three-Dimensional Finite Element Simulation of Shape Rolling of Bars, International Journal of Forming Processes 3 (2000) 253-278.
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• [33] M.A. Saroosh, H.C. Lee, Y.T. Im, S.W. Choi, D.L. Lee, High-Cycle Fatigue Life Prediction of Cold Forging Tools based on Workpiece Material Property, will appear in Journal of Materials Processing Technology (2007).
• [34] H.C. Kwon, Y.S. Lee, S.Y. Kim, J.S. Woo, Y.T. Im, Numerical Prediction of Austenite Grain Size in Round-Oval-Round Bar Rolling, The Iron and Steel Institute of Japan 43 (2003) 676-683.
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• [42] H.S. Kim, Y.T. Im, Expert System for Multi-Stage Cold-Forging Process Design with a Re-Designing Algorithm, Journal of Materials Processing Technology 54 (1995) 271-285.
• [43] H.S. Kim, Y.T. Im, Multi-Stage Cold Forging Process Design with A* Searching Algorithm, Transactions, North American Manufacturing Research Institution of the Society of Manufacturing Engineers NAMRI/SME 24 (1996) 161-166.
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• [46] J.H. Song, Y.T. Im, Development of a Computer-Aided-Design System of Cold Forward Extrusion of a Spur Gear, Journal of Materials Processing Technology 153-154 (2004) 821-828.
• [47] J.H. Song, Y.T. Im, The Applicability of Process Design System for Forward Extrusion of Spur Gears, Journal of Materials Processing Technology 184 (2007) 411-419.
• [48] S.H. Kim, Y.T. Im, A Knowledge-based Expert System for Roll Pass and Profile Design for Shape Rolling of Round and Square Bars, Journal of Materials Processing Technology 89 (1999) 145-151.
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• [50] J.Y. Jung, Y.T. Im, L.K. Hyung, Development of Fuzzy Control Algorithm for Shape Control in Cold Rolling, Journal of Materials Processing Technology 48 (1995) 187-195.
• [51] J.Y. Jung, Y.T. Im, Fuzzy-Control Simulation of Cross-Sectional Shape in Six-High Cold Rolling Mills, Journal of Materials Processing Technology 62 (1996) 61-69.
• [52] J.Y. Jung, Y.T. Im, Simulation of Fuzzy Shape Control for Cold-Rolled Strip with Randomly Irregular Strip Shape, Journal of Materials Processing Technology 63 (1997) 248-253.
• [53] J.Y. Jung, Y.T. Im Fuzzy Algorithm for Calculating Roll Speed Variation based on Roll Separating Force in Hot Rolling, International Journal of Mechanical Sciences 42 (2000) 249-272.
• [54] J.Y. Jung, Y.T. Im, Fuzzy Control Algorithm for the Prediction of Tension Variations in Hot Rolling, Journal of Materials Processing Technology 96 (1999) 163-172.
• [55] T.C. Tszeng, Y.T. Im, S. Kobayashi, Thermal Analysis of Solidification by the Temperature Recovery Method, International Journal of Machine Tools and Manufacture 29 (1989) 107-120.
• [56] Y.H. Chen, Y.T. Im, Analysis of Solidification in Sand and Permanent Mold Castings and Shrinkage Prediction, International Journal of Machine Tools and Manufacture 30 (1990) 175-189.
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• [58] Y.H. Chen, Y.T. Im, J.S. Yoo, Finite Element analysis of Solidification of Aluminum with Natural Convection, Journal of Materials Processing Technology 52 (1995) 592-609.
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• [62] J.D. Fan, L.J. Lee, J. Kim, Y.T. Im, Cure Analysis of Sheet Molding Compound in Molds with Substructures, Polymer Engineering and Science 29 (1989) 740-748.
• [63] L.J. Lee, J.D. Fan, J. Kim, Y.T. Im, Flow Analysis of Sheet Molding Compounds in Compression Molding, International Polymer Processing 6 (1991) 61-72.
• [64] J. Kim, Y.C. Shiau, L.J. Lee, Y.T. Im, Compression Molding Simulation of Chopped Fiber Reinforced Polymeric Composites in Plate-Rib Type Geometry, Polymer Composites 13 (1992) 97-107.
• [65] K.T. Kim, Y.T. Im, Experimental Study on Physical Properties of Compression Molded SMC Parts under Plane Strain Condition, Composite Structures 35 (1996) 131-141.
• [66] J.H. Jeong, K.T. Kim, Y.T. Im, Plane-Strain Compression Molding Analysis of Sheet Molding Compounds in Flat and Cross-Sectional T-Shape Molds, Journal of Materials Processing Technology 57 (1996) 320-331.
• [67] J.H. Jeong, Y.T. Im, Estimation of Sink Mark Depth in Compression Molded SMC Parts with Substructures, Journal of Composite Materials 31 (1997) 2161-2187.
• [68] S.Y. Kim, Y.T. Im, Three-Dimensional Thermo-viscoplastic Analysis of Compression Molding of Sheet Molding Compounds with Fiber Volume Fraction Prediction, Journal of Materials Processing Technology 63 (1997) 631-636.
• [69] D.Y. Kwak, J.H. Jeong, J.S. Cheon, Y.T. Im, Optimal Design of Composite Hood with Reinforcing Ribs through Stiffness Analysis, Composite Structures 38 (1997) 351-359.
• [70] J.S. Cheon, Y.T. Im, Determination of Short Glass-Fiber Volume Fractions in Compression Molded Thermoset Composites-Experimental, Journal of Composite Materials 33 (1999) 525-546.
• [71] J.S. Cheon, Y.T. Im, Determination of Short Glass-Fiber Volume Fractions in Compression Molded Thermoset Composites-Numerical, Journal of Composite Materials 33 (1999) 547-566.
• [72] S.M. Lee, J.S. Cheon, Y.T. Im, Experimental and Numerical Study of the Impact Behavior of SMC Plates, Composite Structures 47 (1999) 551-561.
• [73] K.H. Han, Y.T. Im, Compressible Flow Analysis of Filling and Post-Filling in Injection Molding with Phase-Change Effect, Composite Structures 38 (1997) 179-190.
• [74] K.H. Han, Y.T. Im, Effect of Closure Approximation on Fiber Orientation Distribution in Injection Molding, International Journal of Forming Processes 3 (2000) 213-234.
• [75] K.H. Han, Y.T. Im, Modified Hybrid Closure Approximation for Prediction of Flow-Induced Fiber Orientation, Journal of Rheology 43 (2000) 569-589.
• [76] K.H. Han, Y.T. Im, Numerical simulation of Three-Dimensional Fiber Orientation in Injection Molding including Fountain Flow Effect, Polymer Composites 23 (2002) 222-238.
• [77] D.S. Choi, Y.T. Im, Prediction of Shrinkage and Warpage in Consideration of Residual Stress in Integrated Simulation of Injection Molding, Composite Structures 47 (1999) 655-665.
• [78] W.S. Kang, J.H. Min, J.W. Lee, Y.T. Im, Estimation of Bolted Joint Strength of Flat Plate of Glass-Mat Reinforced Thermoplastics, KSME Trans. A 27 (2003) 1636-1643.
• [79] D.S. Choi, S.S. Lee, Y.T. Im, Fringe Element Reconstruction for Front Tacking for Three-Dimensional Incompressible Flow Analysis, International Journal for Numerical Methods in Fluids 48 (2005) 631-648.
• [80] D.S. Choi, S.W. Lee, S.S. Lee, Y.T. Im, “Micro-Channel Flow Analysis by a Fringe Element Reconstruction Method”, Journal of Micromechanics and Microengineering 16 (2006) 571-579.