Recent Topics
Oils for old engines
by puma4440 - 02/25/20 08:18 PM
Do you still use liquid and paste sealants
by WhyMe - 02/25/20 08:16 PM
VW dealer hilarity - window tinted the wrong car.
by pezzy669 - 02/25/20 07:53 PM
New style Goodyear Duratrac
by NHRATA - 02/25/20 07:44 PM
Need oil additive advise for replacement engine.
by 13Track38 - 02/25/20 07:18 PM
New member with UOA to share
by JamesGames - 02/25/20 07:10 PM
When do you do DIY?
by BMWTurboDzl - 02/25/20 06:47 PM
by hunter29 - 02/25/20 06:41 PM
Ever buy a stranger lunch ?
by Mr Nice - 02/25/20 06:18 PM
36 bucks for balancing two tires....
by Vern_in_IL - 02/25/20 05:20 PM
project farm like test for Maxlife vs toyota WS
by danez_yoda - 02/25/20 05:09 PM
Audi Q5 Transmission oil?
by John344 - 02/25/20 04:35 PM
Valvoline Modern engine
by Villalobos - 02/25/20 04:35 PM
Rust bubbles
by WA1DH - 02/25/20 04:27 PM
Which of these sub $4 filters
by jayjr1105 - 02/25/20 04:05 PM
Flaring tool
by P10crew - 02/25/20 01:52 PM
Hazet 600LG/8 Wrench set - $160
by drtyler - 02/25/20 01:34 PM
Newest Members
akarip, BJD2020, ToyTaco2002, EarlT500, Newbie111
70801 Registered Users
Who's Online Now
34 registered members (Artem, bbhero, BlakeB, blufeb95, car54, Brian553, 3 invisible), 1,419 guests, and 14 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Most Online4,538
Jan 20th, 2020
Donate to BITOG
Print Thread
Hop To
Shear Thickening Fluids (Dilatant), for hydraulics #5156943 07/10/19 04:14 PM
Joined: Nov 2012
Posts: 10
solocraftvs Offline OP
OP Offline
Joined: Nov 2012
Posts: 10
I've often heard that Audi had a shear thickening fluid in their AWD systems. But, I've never been able to substantiate that. But, what I'm really just looking for is to see if there is a dilatant fluid that is NOT a colloidal suspension. It seems there are a variety of shear thickening fluids (dragon skin and similar bullet proof materials). But, All of those are made up of little tiny micro-particles. While I could be wrong, it seems as though filling a hydraulic system with particles is a bad idea. Any thoughts are appreciated.

Wiki on Dilatants

Re: Shear Thickening Fluids (Dilatant), for hydraulics [Re: solocraftvs] #5156964 07/10/19 04:38 PM
Joined: Apr 2018
Posts: 1,604
Imp4 Offline
Joined: Apr 2018
Posts: 1,604
Well, you link states:

The parameters that control shear thickening behavior are: particle size and particle size distribution, particle volume fraction, particle shape, particle-particle interaction, continuous phase viscosity, and the type, rate, and time of deformation. In addition to these parameters, all shear thickening fluids are stabilized suspensions and have a volume fraction of solid that is relatively high.

So your reference seems to think that a colloidal suspension is certainly the most widely observed instance of this condition.

2001 Mitsubishi Galant 2.4 - 165k+
Grandma's creampuff...
Re: Shear Thickening Fluids (Dilatant), for hydraulics [Re: solocraftvs] #5156965 07/10/19 04:38 PM
Joined: Aug 2003
Posts: 14,481
Rand Offline
Joined: Aug 2003
Posts: 14,481
cant you just use a thicker oil?

2019 Jeep Cherokee Trailhawk 2.0T
2020 Hyundai Elantra "Value Edition"
Re: Shear Thickening Fluids (Dilatant), for hydraulics [Re: solocraftvs] #5158509 07/12/19 08:39 AM
Joined: Jun 2002
Posts: 20,913
MolaKule Offline
Global Moderator
Global Moderator
Joined: Jun 2002
Posts: 20,913
Here is a background paper on STF's:


I'm a Student Pilot. Frightening, isn't it?
Previous Thread
Next Thread

BOB IS THE OIL GUY® Powered by UBB.threads™