Lee;
You wrote: " I agree with Kevin in that FEA may be of great use in the
future.
Lee Murphy"
I completely agree. But, I also said as an entire foot model, it is too
complex at this time. A model of the function of the STJ does not a foot
model make, done by FEM or not.
Sincerely;
Bruce
----- Original Message -----
From: "Lee M" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, December 16, 2004 4:04 AM
Subject: Re: EVA vs Plastic/Carbon Fibre FFO's: Discuss
Bruce,
I'm not so sure on your point where you say -
"This is why I FEM is too advanced for most
computers at this time. There is not enough computer power to calculate the
changes at the AJ, and each segment of teh MTJ, and the position of the STJ,
let alon the forces caused by the metatarsals, and fibula and tibia!"
From what I have read, and from the previously mentioned studies/websites)
the technology is in place, but my main problem with the current FEA foot
models is the amount of assumptions on material properties of individual
structures of the foot. Simon mentioned a couple of interesting websites,
one showed the FEA model based on CT scans. Each of the bones of the foot
was built by surface mapping and applying predetermined (assumed) material
properties to the structure. The plantar soft tissues were grouped together
and assigned assumed material properties. Another interesting reference is -
Gefen A. Stress analysis of the standing foot following surgical plantar
fascia release. J Biomech. 2002 May;35(5):629-37.
Although FEA models may provide some insight, a great deal of development is
needed in individual stress testing of foot structures in order to decrease
these assumptions. I agree with Kevin in that FEA may be of great use in the
future.
Lee Murphy
--
___________________________________________________________
Sign-up for Ads Free at Mail.com
http://promo.mail.com/adsfreejump.htm
-----------------------------------------------------------------
This message was distributed by the Podiatry JISCmail list server
All opinions and assertions contained in this message are those of
the original author. The listowner(s) and the JISCmail service take
no responsibility for the content.
to leave the Podiatry email list send a message containing the text
leave podiatry
to [log in to unmask]
Please visit http://www.jiscmail.ac.uk for any further information
-----------------------------------------------------------------
-----------------------------------------------------------------
This message was distributed by the Podiatry JISCmail list server
All opinions and assertions contained in this message are those of
the original author. The listowner(s) and the JISCmail service take
no responsibility for the content.
to leave the Podiatry email list send a message containing the text
leave podiatry
to [log in to unmask]
Please visit http://www.jiscmail.ac.uk for any further information
-----------------------------------------------------------------
|