Search Results - "Giacomin, A. Jeffrey"

Who conceived the “complex viscosity”? by Bird, R. Byron, Giacomin, A. Jeffrey

“…In small amplitude oscillatory shear flow, we now universally represent the response of a viscoelastic fluid as a complex quantity, which we call “complex…”
Get full text

Viscous dissipation in plastic pipe extrusion by Kolitawong, Chanyut, Giacomin, A. Jeffrey, Nontakaew, Udomkiat

“…We study the temperature distribution of a power‐law fluid in a pressure‐driven axial flow between eccentric cylinders in bipolar cylindrical coordinates. We…”
Get full text

Sheet temperature in thermoforming by Michaud, Ryan A, Giacomin, A Jeffrey

“…In thermoforming, flat plastic sheets are transformed into complex shapes by first softening by radiant heat transfer, and then by shaping. During the…”
Get full text

Large-amplitude oscillatory shear: comparing parallel-disk with cone-plate flow by Giacomin, A. Jeffrey, Gilbert, Peter H., Merger, Dimitri, Wilhelm, Manfred

“…We compare the ratio of the amplitudes of the third to the first harmonic of the torque , , measured in rotational parallel-disk flow, with the ratio of the…”
Get full text

Suppressing shrinkage/warpage of PBT injection molded parts with fillers by Xie, Zhouhao, Wu, Xianghong, Giacomin, A. Jeffrey, Zhao, Guoqun, Wang, Weihua

“…Polybutylene terephthalate (PBT) was chosen as the model polymer for studying the method of polymer modification in purpose of suppressing shrinkage and…”
Get full text

Elastomers in large-amplitude oscillatory uniaxial extension by Dessi, Claudia, Vlassopoulos, Dimitris, Giacomin, A. Jeffrey, Saengow, Chaimongkol

“…In this work, we subject elastomers to a fixed pre-stretch in uniaxial extension, ε p , upon which a large-amplitude, ε 0 , oscillatory uniaxial extensional…”
Get full text

Padé approximants for large-amplitude oscillatory shear flow by Giacomin, A. Jeffrey, Saengow, Chaimongkol, Guay, Martin, Kolitawong, Chanyut

“…Analytical solutions for either the shear stress or the normal stress differences in large-amplitude oscillatory shear flow, both for continuum or molecular…”
Get full text

Wall slip heating by Gilbert, Peter H., Giacomin, A. Jeffrey

“…When molten plastic is extruded, the upper limiting throughput is often dictated by fine irregular distortions of the extrudate surface. Called sharkskin melt…”
Get full text

Simple Scalar Model and Analysis for Large Amplitude Oscillatory Shear by Merger Dimitri, Abbasi Mahdi, Merger Juri, Giacomin A. Jeffrey, Saengow Chaimongkol, Wilhelm Manfred

“…This work presents a simple, scalar model for predicting a nonlinear shear stress response of a viscoelastic fluid in Large Amplitude Oscillatory Shear (LAOS)…”
Get full text

Review of die lip buildup in plastics extrusion by Gander, Jesse D., Giacomin, A. Jeffrey

“…Die lip buildup, also called plate‐out, die drrool, die drip, or die peel, refers to the unwanted material accumulation on the open faces of extrusion dies…”
Get full text

Network theory for polymer solutions in large amplitude oscillatory shear by Jeyaseelan, Ranjit S., Giacomin, A. Jeffrey

“…A framework based on molecular entanglement kinetics is used to interpret the large amplitude oscillatory shear (LAOS) behavior of polyacrylamide and…”
Get full text

Transient shear flow behavior of concentrated long glass fiber suspensions in a sliding plate rheometer by Ortman, Kevin C., Agarwal, Neeraj, Eberle, Aaron P.R., Baird, Donald G., Wapperom, Peter, Jeffrey Giacomin, A.

“…► We study the transient shear rheology of a long glass fiber melt. ► The sliding plate rheometer showed consistency with a cone-and-donut rheometer. ►…”
Get full text

Thermoforming triangular troughs by Lieg, Katie Lynn, Giacomin, A. Jeffrey

“…This analysis for thermoforming triangular troughs focuses on the manufacturing process speed and follows the method of Kershner and Giacomin for thermoforming…”
Get full text

Πάντα Ῥει̃: Everything Flows by Beris Antony N., Giacomin A. Jeffrey

“…This historical study deepens the rheologist’s understanding of the motto of The Society of Rheology, of its history, and of its many typographies. The motto…”
Get full text

Converging shear rheometer by Baek, Hyung M., Mix, Adam W., Giacomin, A. Jeffrey

“…For highly viscous fluids that slip in parallel sliding plate rheometers, we want to use a slightly converging flow to suppress this wall slip. In this work,…”
Get full text

Dynamic fracture toughness of polypropylene reinforced with cellulose fiber by Clemons, Craig M., Giacomin, A. Jeffrey, Koutsky, James A.

“…To better understand mechanisms of fracture under impact loading in cellulose‐reinforced polypropylene, dynamic fracture analysis was performed based on linear…”
Get full text

Die lines in plastics extrusion: Film blowing experiments and numerical simulation by Ding, Fan, Giacomin, A. Jeffrey

“…Die lines are annoying surface striations that can destroy extrudate aesthetics and compromise product properties. The available literature on die lines has…”
Get full text

Die Drool and Polymer Degradation by Hoy, Geoffrey S., Giacomin, A. Jeffrey, Gilbert, Peter H.

“…Die drool is an operational problem associated with polymer extrusion. The extrudate collects outside of the die, necessitating periodic disruptions for…”
Get full text

Dynamic response of a shear stress transducer in the sliding plate rheometer by Kolitawong, Chanyut, Jeffrey Giacomin, A.

“…The damping caused by polymer melt, which commonly gets into the housing of a shear stress transducer, is determined analytically. The analysis employs bipolar…”
Get full text

Flaring dies to suppress die drool by Ding, Fan, Zhao, Lian, Giacomin, A. Jeffrey, Gander, Jesse D.

“…Die lip build‐up is the unwanted material accumulation on extrusion die lips. Here, flared dies are shown experimentally to suppress die lip build‐up. A…”
Get full text