BT Brace Better handling - Page 7 - Toyota Prius Forum : Prius Online Toyota Forums
User Tag List

Reply
 
LinkBack Thread Tools
post #61 of 63 (permalink) Old 09-01-2006, 07:34 PM
Member
 
Join Date: Aug 2005
Posts: 39
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Default

Hi Cardiome,

I am not sure what you mean by "socalled" in regards to the FEM results. Its just what BTTEK said it is. From you other comments regarding having students in MEM (Micro Electro Mechanical) one would think that would be apparent to you. You may not know that Brian did not do the analysis. It was done well after the plate had been on the market by a customer of his.

You might also wish to review the concept of "tensegrity". Maybe not, though. How exactly is sandwiching two plates going to change the prius into a tensegrity structure?

Here is a link to a site with pictures of various tensegrity structures: http://www.tensegrity.com/ .
donee is offline  
Sponsored Links
Advertisement
 
post #62 of 63 (permalink) Old 09-03-2006, 06:56 PM
Junior Member
 
Join Date: Aug 2006
Location: PA
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Default

Quote:
Originally Posted by donee
Hi Cardiome,

I am not sure what you mean by "socalled" in regards to the FEM results. Its just what BTTEK said it is. From you other comments regarding having students in MEM (Micro Electro Mechanical) one would think that would be apparent to you. You may not know that Brian did not do the analysis. It was done well after the plate had been on the market by a customer of his.

You might also wish to review the concept of "tensegrity". Maybe not, though. How exactly is sandwiching two plates going to change the prius into a tensegrity structure?

Here is a link to a site with pictures of various tensegrity structures: http://www.tensegrity.com/ .
It seems that I need to break the code on the cryptic writing (portmanteau) and acronyms I used.

MEM = Mechanical Engineering and Mechanics
Tensegrity (Tensional integrity): the integrity of certain structures can be maintained by balancing tension (wire-continuous) and compression (strut-discourteous) of the interconnected components (e.g. Geodesic Domes, Suspension Bridge)

I evoked the concept of Tensegrity mostly to entertain and emphasize how easy it might be to exaggerate the relevance of the Plate’. Indeed, the scaffold (Plate Sandwich) that I plan to experiment with has precious little to do with tensional integrity of the Prius. Actually, I (and many of my students) played with mechanical (wire and stick) models that are rooted in this intriguing concept (principle) as a way to explain how biological cells maintain their architectural (cytoskeleton) integrity.

The rest is merely ‘tongue and cheek’ (mostly cheek). In particular, the “so-called” FEA used to help understand (and/or convince) that one Plate is better (stiffer) than the other has little to offer when explaining (modeling) how the body-frame of our p-car will behave if you exchange one for the other.

Noteworthy is the remarkably thin frame (and weak attachment points) where this newly found node of mechanical (ins)stability was discovered...

Sorry, I’m just another “Jack comes lately” who is not helping extinguish a topic that seems to be getting so much play without the science at hand to support it all.

J.
cardiome is offline  
post #63 of 63 (permalink) Old 09-05-2006, 07:25 PM
Member
 
Join Date: Aug 2005
Posts: 39
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Default

Hi Cardiome,

Yes, I think I agree with your last paragraph. Which is why I made my comments. Not the "Johny-come-lately" stuff, just the too little science part. The application of biological/medical sciences design of experiments discussions in what is a mechanical engineering issue, I find totally without merrit. The Prius is not a complicated microscopic chemical system, and can readily be measured, given the resources.

If we spent the time mounting deflection guages crossed (front left to rear right and visa versa) between the mounting points of the plate, instead of this inane attack on anecdotes, we would be allot further along.

Would you have the resources to perform such testing? How about accelerometers in the front, rear and on the CG ? Do you have a source of predictable highly changable cross-winds? And the multi-channel DAQ to record the dynmical events? Maybe mouting the deflection gauges inside of the rear of the car, crossed, so that any deflection of one side of the car (crabing in the horizontal, twisting along the lengthwise axis, or crabing in the vertical plane) with respect to the other can be detected?
donee is offline  
Reply

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



  Similar Threads
Thread Thread Starter Forum Replies Last Post
Stop and Go traffic handling? melgish Toyota Prius - Technical Chat 14 08-03-2004 12:37 PM
2004: Handling, Seats and Nav/Stereo Vandalay Toyota Prius General Discussion 2 04-26-2004 01:21 PM
ice/snow handling moocatdog Toyota Prius General Discussion 5 01-28-2004 10:33 PM
Delivery Handling and Processing Fee TBangs Toyota Prius General Discussion 2 11-25-2003 04:11 PM
Handling in Bad Weather Toyota Prius General Discussion 3 03-13-2002 02:32 PM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome