ECOTECT - Rheology · Note: Graphic reflects both technology and company acquisitions, ownership of...
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Transcript of ECOTECT - Rheology · Note: Graphic reflects both technology and company acquisitions, ownership of...
Note: Graphic reflects both technology and company acquisitions, ownership of parent company is not implied
ECOTECT
$500M+
Simulation
Investment
230+ Direct
Development
Staff
Mobile
Embedded Desktop
Cloud
FEA
Structural / Code Checking
CFD
Manufacturing
Test and Validation
Simulate the flow of melted plastic to help optimize part and mold
designs, reduce potential part defects, and improve the molding
process
Viscosity v s She ar R ate at 0M Pa
10
100
1000
10000
10 100 1000 10000 100000
S he a r Ra te [1/s]
Vis
co
sit
y [
Pa
.s]
290 310 330
Viscosity v s She ar R ate at 290oC
10
100
1000
10000
10 100 1000 10000 100000
S he a r Ra te [1/s]
Vis
co
sit
y [
Pa
.s]
0 M P a 50 M P a 100 M P a
Arburg 35 ton Arburg 160 ton
Arburg 35 ton
Battenfeld 150 ton
2 * Krauss Maffei 160 ton
Melbourne, Australia
Ithaca, NY, USA
1:8
43
4
ADdE
lFF
ff
im
criti
Tension Zero Zero Compression
Dinh & Armstrong Model / Critical Buckling Force
Cb: Strain Rate Coefficient Parameter
: Dimensionless Drag Coefficient (Dg)
S: Distribution Parameter
Number of fibers of length li which exist at time t
Midplane Near Center
3D Cutting Plane
Shear Rate
Courtesy: Ticona
Core
Shear Layer
Skin
A5 A1 A3
Flow Length
Thickness
Fiber Length in shearing layer
Midplane 3D
PP, 20% talc filled Sumitomo, Noblen BZE62F5B
0
2000
4000
6000
8000
10000
12000
0.9
0.95
1
1.05
1.1
1.15
1.2
1.25
0 100 200 300
Sp
ecif
ic H
eat
[J/k
g-C
]
Sp
ecif
ic V
olu
me [
cm
^3/g
]
Temperature (deg.C)
Specific Volume
Specific Heat
25
van der Beek et. al. Inter. Polymer Processing, 20, 111-120, (2005).
26
van der Beek et. al. Inter. Polymer Processing, 20, 111-120, (2005).
Image: IME Technologies
27
G(T) N(T, Ff)
T
TTfTT
TTT
Kf
TTR
UGTG
m
g
m
g
2 ,30
,exp*
exp)(
0
00
),(1
)(ln0
0
0
TFfNN
bTTaN
NNN
ff
N
f
NmN
f
)(exp1
)()(
)()(3
4
2
0
3
0
0
dsduuGsL
dsduuGsN
t
s
t
total
t
s
t
(Growth
Rate)
(Nuclei number
density)
Hadinata et al.
PPS 23
aN, bN, T0m, G0 & Kg
Are determined from
DSC Experiments for
each material grade
28
Viscosity
Specific Heat
Thermal Conductivity
Density
Temperature
E11
E11
E22
30
Mechanical Strains
Thermal Strains
Stiffness tensor
Residual Stress
Uncorrected (no CRIMS) shrinkage in the flow direction for an Amorphous non-fiber material. (HIPS) Perpendicular Shrinkage shows a similar trend.
Often observe imbalance in symmetric part Due to shear heating - convection pattern
Often observe imbalance in symmetric part Due to shear heating - convection pattern
*Plastics, Rubber and Composites Processing and Applications Vol 20 (3), 1993. pp137-149
40% GF
50% GF
