106 Papers
1K Citations
John R. Collier is an academic researcher from Florida A&M University – Florida State University College of Engineering. The author has contributed to research in topics: Laser & Rheology. The author has an hindex of 24, co-authored 106 publications. Previous affiliations of John R. Collier include Ohio University & Louisiana State University.
Chat about Author
Papers
Drape Prediction by Means of Finite-element Analysis
TL;DR: In this paper, the draping behavior of fabric treated as an orthotropic shell membrane is predicted by using a geometric non-linear finite-element method, and the results are compared with actual behaviour.
179
Injection molding of polymeric LIGA HARMs
TL;DR: Madou et al. as mentioned in this paper developed the three-step LIGA process to inexpensively manufacture high aspect ratio microstructures (HARMs), where the first two steps of the process (lithography and electroplating) produce a metallic mold insert that can be used as a template for molding microstructure.
118
Elongational rheology of polymer melts and solutions
TL;DR: In this article, the effect of body forces related to developing orientation in the fluid during converging extensional flow are measured using non-lubricated flow characteristics through a semihyperbolic converging die, eliminating the need for lubrication to achieve an essentially pure elongational flow.
63
Unsteady‐state heat transfer in a crystallizing polymer
TL;DR: In this paper, the authors present the results of a mathematical modeling study of the unsteady state temperatures inside a crystallizing polymer during quenching, which is applicable to a wide variety of problems in polymer processing, particularly for those polymers which exhibit crystallization.
60
A numerical study of the measurement of elongational viscosity of polymeric fluids in a semihyperbolically converging die
TL;DR: In this article, a method for measuring the elongational viscosity of polymer melts and solutions has been generalized and evaluated by means of numerical simulations, which involves passing a material through a cylindrical, converging die whose semihyperbolic shape mandates a shear-free, or nearly shear free, flow within the die, assuming wall slip.
60