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A. Jeffrey Giacomin
Professor
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| A. Jeffrey Giacomin |
| A. Jeffrey Giacomin Professor |
| 2266 Mechanical Engineering Building 1513 University Avenue Madison, WI 53706-1572 |
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Tel: 608/262-7473 (AM-A-PIPE) Fax: 608/262-7473 E-mail: giacomin@wisc.edu |
REFEREED
JOURNAL PUBLICATIONS
(58) Lieg, K.L. and A.J. Giacomin, "Thermoforming Triangular Troughs," Polymer Engineering and Science (Accepted, May 16, 2008).
(57) Kolitawong, C. and A.J. Giacomin, "Shear Stress
Transduction," Review of Scientific Instruments (Accepted, April 22, 2008).
(56) Kershner, M.A. and A.J. Giacomin, "Thermoforming
Cones," Zeitschrift Kunststofftechnik (Journal of Plastics Technology), 3(3), 1-25 (2007).
(55) Jeyaseelan, R.S. and A.J. Giacomin, "Network Theory for Polymer Solutions In Large Amplitude Oscillatory Shear," Journal of Non-Newtonian Fluid Mechanics, 148, 24–32 (2008).
(54) Chen, Z.B., L.S. Turng and A.J. Giacomin, "Flash," Polymer Engineering and Science, 46(3), 241-247 (March, 2006).
(53) Ding, F. and A.J. Giacomin, "Die Lines in Plastics Extrusion: Film Blowing Experiments
and Numerical Simulation," Polymer Engineering and Science, 44(10), 1811-1827 (2004).
(52) Wang, Y.-C., S. Gunasekaran, and A.J. Giacomin, "The Lodge Rubberlike Liquid Behavior for Cheese in Large Amplitude Oscillatory Shear," Applied Rheology, 11(6), 312-319 (November/December, 2001).
(51) Kolitawong, C. and A.J. Giacomin, "Dynamic Response of a Shear Stress Transducer in the Sliding Plate Rheometer," Journal of Non-Newtonian Fluid Mechanics, 102, 71-96 (2002).
(50) Hade, A.J. and A.J. Giacomin, "Power Law Numerical Solution for Post-Die Extrusion of Plastic Pipe," Polymer-Plastics Technology and Engineering, 41(1), 1-17 (2002).
(49) Ding, F., A.J. Giacomin and J.C. Slattery, "Sheet Coating by Drawdown of Extruded Polymer," Journal of Coatings Technology, 73(921), 127-134 (October, 2001).
(48) Kolitawong, C. and A.J. Giacomin, "Axial Flow Between Eccentric Cylinders," Polymer-Plastics Technology and Engineering 40(3), 373-394 (2001).
(47) Ding, F., L. Zhao, A.J. Giacomin and J. D. Gander, "Flaring Dies to Suppress Die Drool," Polymer Engineering and Science, 40(10), 2113-2123 (October, 2000).
(46) Hade, A.J. and A.J. Giacomin, "Wire Coating Under Vacuum," Journal of Engineering Materials and Technology, 123(1), 100-105 (2001).
(45) Hade, A.J. and A.J. Giacomin, "Power Law Model for Tube Coating of Wire," Journal of Polymer Engineering, 20(4), 267-285 (July-August, 2000).
(44) Hade, A.J. and A.J. Giacomin, "Melt Tearing and Ovality in Wire Coating," Polymer Engineering and Science, 40(8), 1862-1869 (August, 2000 ).
(43) Hade, A.J., A.J. Giacomin, J.C. Slattery and D.N. Githuku, "Postdie Extrusion of Plastic Pipe," Polymer-Plastics Technology and Engineering, 39(1), 23-46 (2000).
(42) Ding, F. and A.J. Giacomin, "Die Lines in Plastics Extrusion," Journal of Polymer Engineering, 20(1), 1-39 (2000).
(41) Fan Ding, A.J. Giacomin and J.C. Slattery, "Angular Plane Curtain Coating By Drawdown of an Extruded Melt," Journal of Coatings Technology, 72(900), 63-68 (January, 2000).
(40) Clemons, C.M., A.J. Giacomin and D.F. Caulfield, "Dynamic Fracture Toughness of Cellulose-Fiber-Reinforced Polypropylene: Preliminary Investigation of Microstructural Effects," Journal of Elastomers and Plastics, 31(4), 367-378 (October, 1999).
(39) Ding, F., A.J. Giacomin and J.C. Slattery, "Angular Wire Coating by Drawdown of an Extruded Melt," Polymer-Plastics Technology and Engineering, 38(5), 869-881 (1999).
(38) Ding, F., A.J. Giacomin, R.B. Bird and C.-B. Kweon, "Viscous Dissipation with Fluid Inertia in Oscillatory Shear Flow," Journal of Non-Newtonian Fluid Mechanics, 86(3), 359-374 (September, 1999).
(37) Slattery, J.C., A.J. Giacomin and F. Ding, "Wire Coating by Drawdown of an Extruded Annular Melt," International Polymer Processing, XIV(2), 152-158 (June 1999).
(36) Tariq, S., A.J. Giacomin and S. Gunasekaran, "Nonlinear Viscoelasticity of Cheese," Biorheology, 35 (3), 171-191 (May-June, 1998).
(35) Lan, S.-K., A.J. Giacomin and Fan Ding, "Dynamic Slip and Nonlinear Viscoelasticity," Polymer Engineering and Science, 40(2), 507-524 (February 2000).
(34) Yosick, J.A., A.J. Giacomin, W.E. Stewart and Fan Ding, "Fluid Inertia in Large Amplitude Oscillatory Shear," Rheologica Acta, 37, 365-373 (1998).
(33) Oakley, J.G., J.A. Yosick and A.J. Giacomin, "Molecular Origins of Nonlinear Viscoelasticity," Mikrochimica Acta, 130, 1-28 (1998).
(32) Dhori, P.K., R.S. Jeyaseelan, A.J. Giacomin and J.C. Slattery, "Common Line Motion III: Implications in Polymer Extrusion," Journal of Non-Newtonian Fluid Mechanics, 71(3), 231-243 (August, 1997).
(31) Dhori, P.K., A.J. Giacomin and J.C. Slattery, "Common Line Motion II: Sliding plate rheometry," Journal of Non-Newtonian Fluid Mechanics, 71(3), 215-229 (August, 1997).
(30) Clemons, C.M., A.J. Giacomin and J.A. Koutsky, "Dynamic Fracture Toughness of Polypropylene Reinforced with Cellulose Fiber," Polymer Engineering and Science, 37(6), 1012-1018 (June, 1997).
(29) Yosick, J.A., A.J. Giacomin and P. Moldenaers, "A Kinetic Network Model for Nonlinear Flow Behavior of Molten Plastics in Both Shear and Extension," Journal of Non-Newtonian Fluid Mechanics, 70, 103-123 (1997).
(28) Gander, J.D. and A.J. Giacomin, "Review of Die Lip Buildup in Plastics Extrusion," Polymer Engineering and Science, 37(7), 1113-1126 (July, 1997).
(27) Yosick, J.A. and A.J. Giacomin, "Can Nonlinear Deformation Amplify Subtle Differences in Linear Viscoelasticity?," Journal of Non-Newtonian Fluid Mechanics, 66, 193-212 (1996).
(26) Jeyaseelan, R.S. and A.J. Giacomin, "Polymer Melt Anisotropy in Biaxial Shear," Journal of Rheology, 39(2), 267-283 (1995).
(25) Jeyaseelan, R.S. and A.J. Giacomin, "The Role of Temperature in the Entanglement Kinetics of a Polymer Melt," Journal of Applied Mechanics, 62(3), 794-801 (September, 1995).
(24) Thomas, V., A.J. Giacomin and A. Wolfenden, "Measuring the Viscoelastic Properties of an Ethylene-Tetrafluoroethylene Copolymer at Ultrasonic Frequencies," Polymer Engineering and Science, 35(12), 1053-1060 (June, 1995).
(23) Thomas, V., A.J. Giacomin and A. Wolfenden, "A Rheometer to Measure the Viscoelastic Properties of Polymer Melts at Ultrasonic Frequencies," Review of Scientific Instruments, 65(7), 2395-2401 (July, 1994).
(22) Jeyaseelan, R.S. and A.J. Giacomin, "Structural Network Theory for a Filled Polymer Melt in Large Amplitude Oscillatory Shear," Polymer Gels and Networks, 3, 117-133 (1995).
(21) Giacomin, A.J. and R.S. Jeyaseelan, "A Constitutive Theory for Polyolefins in Large Amplitude Oscillatory Shear," Polymer Engineering and Science, 35(9), 768-777 (Mid-May, 1995).
(20) Jeyaseelan, R.S. and A.J. Giacomin, "Predicting Polymer Melt Behavior Near the Inception of Wall Slip in Oscillatory Shear," Journal of Non-Newtonian Fluid Mechanics, 53, 99-111 (1994).
(19) Adrian, D.W. and A.J. Giacomin, "The Transition to Quasi-Periodicity for Molten Plastics in Large Amplitude Oscillatory Shear," Journal of Engineering Materials and Technology, 116, 446-450 (1994).
(18) Wolfenden, A., K.K. Chawla, J.E. Gill, R.U. Vaidya, V. Thomas, R. Venkatesh, A.J. Giacomin and L.S. Cook, "The Relation of Dynamic Elastic Moduli, Mechanical Damping and Mass Density to the Microstructure of Some Glass Matrix Composites," Journal of Materials Science, 29, 1670-1675 (1994).
(17) Giacomin, A.J. and J.G. Oakley, "Obtaining Fourier Series Graphically From Large Amplitude Oscillatory Shear Loops," Rheologica Acta, 32, 328-332 (1993).
(16) Jeyaseelan, R.S. and A.J. Giacomin, "How Affine is the Entanglement Network of Molten Low-Density Polyethylene in Large Amplitude Oscillatory Shear?," Journal of Engineering Materials and Technology, 116(1), 14-18 (January, 1994).
(15) Giacomin, A.J., R.S. Jeyaseelan and K.O. Stanfill, "Relating Blow Moldability to Large Amplitude Oscillatory Shear Behavior," Polymer Engineering and Science, 34(11), 888-893 (Mid-June, 1994).
(14) Giacomin, A.J., R.S. Jeyaseelan, T. Samurkas and J.M. Dealy, "Validity of Separable BKZ Model for Large Amplitude Oscillatory Shear," Journal of Rheology, 37(5), 811-826 (1993).
(13) Jeyaseelan, R.S. and A.J. Giacomin, "Best Fit for Differential Constitutive Model Parameters to Nonlinear Oscillation Data," Journal of Non-Newtonian Fluid Mechanics, 47, 267-280 (1993).
(12) Thomas, V., A.J. Giacomin and A. Wolfenden, "A Single Quartz Crystal to Measure Dynamic Young's Modulus at Several Ultrasonic Frequencies," Review of Scientific Instruments, 64(2), 492-494 (February, 1993).
(11) Weissenberger, M.M., A.J. Giacomin, J. Reuscher and C. Russell, "Real-Time Neutron Radiography of Injection Mold Filling," International Polymer Processing, VIII, 360-364 (December, 1993).
(10) Oakley, J.G. and A.J. Giacomin, "A Sliding Plate Normal Thrust Rheometer for Molten Plastics," Polymer Engineering and Science, 34(7), 580-584 (1994).
(9) Githuku, D.N. and A.J. Giacomin, "A Spectral Element Simulation of Gravitational Flow During Plastic Pipe Extrusion," Journal of Engineering Materials and Technology, 115(4), 433-439 (October, 1993).
(8) Giacomin, A.J., R.S. Jeyaseelan and J.G. Oakley-, "Structure Dependent Moduli in the Contravariant Derivative of Structural Network Theories for Melts," Journal of Rheology, 37(1), 127-132 (1993).
(7) Jeyaseelan, R.S., A.J. Giacomin and J.G. Oakley, "Simplification of Network Theory for Polymer Melts in Nonlinear Oscillatory Shear," AIChE Journal, 39(5), 846-854 (May, 1993).
(6) Giacomin, A.J. and J.G. Oakley, "Structural Network Models for Molten Plastics Evaluated in Large Amplitude Oscillatory Shear," Journal of Rheology, 36(8), 1529-1546 (1992).
(5) Adrian, D.W. and A.J. Giacomin, "The Quasi-Periodic Nature of a Polyurethane Melt in Oscillatory Shear," Journal of Rheology, 36(7), 1227-1243 (1992).
(4) Githuku, D.N. and A.J. Giacomin, "Elimination of Sag in Plastic Pipe Extrusion," International Polymer Processing, VII(2), 140-143 (June, 1992).
(3) Githuku, D.N. and A.J. Giacomin, "Simulation of Slump in Plastic Pipe Extrusion," Journal of Engineering Materials and Technology, 114(1), 81-83 (January, 1992).
(2) Tielking, J.T., R.R. Hanson and A.J. Giacomin, "Viscoelastic Properties of Aircraft Tire Materials," Tire Science and Technology, 18(4), 262-281 (October-December, 1990).
(1) Giacomin, A.J., T. Samurkas, and J.M. Dealy, "A Novel Sliding Plate Rheometer for Molten Plastics," Polymer Engineering and Science, 29(8), 499-504 (April, 1989).
BOOK
CHAPTERS
(4) Giacomin, A.J. and J.M. Dealy, "Using Large-Amplitude Oscillatory Shear," Chapter 11, Collyer, A.A. and D.W. Clegg, eds., Rheological Measurement, 2nd ed., Kluwer Academic Publishers, Dordrecht, Netherlands, pp. 327-356 (1998).
(3) Dealy, J.M. and A.J. Giacomin, "Sliding Plate and Sliding Cylinder Rheometers," Chapter 8, Collyer, A.A. and D.W. Clegg, eds., Rheological Measurement, 2nd ed., Kluwer Academic Publishers, Dordrecht, Netherlands, pp. 237-259 (1998).
(2) Giacomin, A.J. and J.M. Dealy, "Large-Amplitude Oscillatory Shear," Chapter 4, Collyer, A.A., ed., Techniques in Rheological Measurement, Chapman and Hall, London & New York, pp. 99-121 (1993); Kluwer Academic Publishers, Dordrecht, pp. 99-121 (1993).
(1) Dealy, J.M. and A.J. Giacomin, "Sliding Plate and Sliding Cylinder Rheometers," Chapter 12, Collyer, A.A. and D.W. Clegg, eds., Physical Principles of Rheological Measurement, Elsevier Applied Science Publishers, Ltd., New York, pp. 383-404 (1988).
PATENTS
Slattery, J.C. and A.J. Giacomin, "Method of Extruding Plastics," U.S. Patent No. 5,637,268 (June 10, 1997).
Professor Giacomin's group explores the role played by rheology in plastics processing. This group develops rheometers for measuring the rheological properties of molten plastics. His laboratory is equipped with a special instrument for measuring nonlinear viscoelastic properties: a sliding plate rheometer incorporating a shear stress transducer. With this equipment, Giacomin's group probes the kinetics of flow-induced disentanglement and re-entanglement in molten plastics. Thus, they explore the governing role played by rheology in plastics processing operations. Specific investigations include thermoforming, plastic-pipe extrusion, programmed-parison profiling in blow molding, and melt fracture in film blowing.
Thermoforming is the deformation of flat plastics sheeting into thin complex shapes such as clear rigid packaging. We develop analytical solutions to sheet forming, focusing especially on the rates of deformation, and the stresses in the deforming sheets. We employ a transport phenomena approach to the mechanics of thermoforming. We also employ computational viscoelastic analysis software (POLYFLOW) for advanced studies of thermoforming and other plastics manufacturing problems.
Giacomin's group also explores processing elastohydrodynamics, a class of manufacturing problems where fluids interact with deflecting structures. Our specialties include core deflection in injection molding, and roll coating (with deformable rolls).
Giacomin's group studies polymer hardness and durometry. Using indentation mechanics, we interpret the measured polymer hardness in terms of the Young's modulus. We apply the method to standardized indentation hardness measurements such as those conforming to ASTM D2240 and ASTM D2583.
The sliding plate rheometer is also used to explore wall slip in molten plastics, and its pivotal effect on processing. Specifically, Professor Giacomin's group is now exploring how wall slip affects extrusion flow instabilities. These matter because they govern the maximum throughput in extrusion.
Experimental and theoretical investigations on die-lip build-up (die drool) in extrusion and on die line formation are also underway. Here, Giacomin's group aims to explain the mysterious build-up of unwanted material on the open faces of extrusion dies. Die drool affects how often extrusion lines must be shut-down for die cleaning.
Giacomin's group has used real-time neutron radiography to visualize flow in injection molding. Neutron radiography allows the polymer to be viewed through the walls of metal molds and of processing equipment; a unique collaboration with nuclear engineering. This approach supersedes classical approaches to flow visualization by inserting glass windows in the process equipment, or by stopping the flow at intermediate points in the mold filling cycle (called short shots).
Plastic pipe solidifies slowly when extruded. The melt thus flows under its own weight. Called sag, this is why plastic tubes have imperfect shapes. These wall thickness variations cause material waste, usually exceeding 5%. Giacomin's group models pipe sag and other aspects of pipe extrusion. Giacomin is writing a book on plastic pipe.
Professor Giacomin and his students have published more than 50 journal articles on blow molding, pipe extrusion, wire coating, sheet coating, cellulose fiber filled materials, ultrasonic property measurement, sliding plate rheometry and on the nonlinear viscoelasticity of molten plastics and cheese. His research has attracted industrial support from 3M, Curwood (Bemis), Dow Chemical, DuPont, IBM, Kimberly-Clark, Phillips 66, Placon, Plastics Ingenuity and Shell Development. Professor Giacomin also serves as an expert witness in polymer and plastics patent litigation and in plastics product liability, and also as a consulting engineer to the polymer and plastics industries.
Professor Giacomin is registered as a Professional Engineer in Wisconsin. He has also been registered in Texas and Quebec. He now serves as faculty advisor to the student chapter of the Society of Plastics Engineers at the University of Wisconsin.
Professor Giacomin is Vice-President of The Society of Rheology. Giacomin also now serves as Associate Editor for Business of the Journal of Rheology, the archival journal of The Society of Rheology. In 1999, the RRC hosted the Annual Meeting of The Society of Rheology when Professor Giacomin chaired the Local Arrangements Committee. In 2009, Giacomin again chaired this committee, as the RRC welcomed The Society of Rheology back for another Annual Meeting. Both meetings set registration records, 367 registrants in 1999, and in 2009, 470.
Professor Giacomin chairs the Executive Committee of the Rheology Research Center.
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Copyright 2009 The Board of Regents of the University of Wisconsin System Date last modified: 22-Dec-2009 Content by: giacomin@wisc.edu Accessibility Web services |