ECOTECT - Rheology · Note: Graphic reflects both technology and company acquisitions, ownership of parent company is not implied ECOTECT $500M+ Simulation Investment

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