iTunes Lectures CM4650
Polymer RheologyDr. F. A. Morrison
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Introduction
to Rheology |
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Math review:
vectors and tensors, Einstein notation |
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| Blizzard day
off 2007 |
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Material functions: predictions of Newtonian model in elongation; predictions of modified Newtonian model; begin Experimental observations, effect of MW on viscosity | ||
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Experimental Observations: effect of MW and architecture on viscosity |
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| Spring Break |
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Experimental
Observations: SAOS, damping function in large-amplitude step strain |
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Review
Experimental observations, introduction to GNF |
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GNF: problem solving: pressure driven flow in a tube with PL GNF | ||
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GNF:
problem solving: drag flow of a PL GNF |
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LVE: GNF doesn't have memory; try simple memory model | ||
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LVE: Maxwell model; integral Maxwell model; predict step-strain material functions with Maxwell model | ||
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Exam 2
review/prep |
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LVE:
generalized Maxwell model; generalized linear-viscoelastic model |
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LVE: GLVE in
SAOS; discuss turntable example (no details covered, see handout on web) |
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LVE:
What's wrong with GLVE? What is the strain measure? |
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Advanced: what is infinitesimal strain tensor in rigid rotation? predicts angle dependene of stress (wrong); derive F, Finv | ||
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Advanced: polar decomposition, C, Cinv; Lodge model; Lodge model in turntable example; upper convected time derivative | ||
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Advanced:
other advanced constitutive models, Jeffreys, Oldroyd, White-Metzner,
Rivllin-Sawyers; intro to molecular modeling |
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Rheometry:
Beginning of Rheometry, capillary flow, stress and shear rate in
capillary flow (Newtonian, Power-law), Rabinowitz correction |
2007 |
18 April 2008 |
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Rheometry:
Corrections to capillary flow; cone and plate, parallel plate; compare
geometries |
2007 |
21 April 2008 |
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Rheometry:
Elongational flows; HW help: calculate start-up function for
Lodge model |
2007 |
23 April 2008 |