Re: Socket Lamination
Chris Johnson, CPI Engineering Director
Description
Collection
Title:
Re: Socket Lamination
Creator:
Chris Johnson, CPI Engineering Director
Date:
11/11/1998
Text:
My apologies, I sent this unfinished and not edited e-mail (spaeling mis
stakes!) prematurely, and I am still looking for that lay-up sequence!
Chris (CJ) Johnson, Engineering Director
College Park Industries, Inc. ( <URL Redacted>)
On Tue, 10 Nov 1998 08:32:59 -0500 <Email Address Redacted> (Chris L Johnson)
writes:
>There was a question on the list as to exactly why sockets are
>supposed to be laminated in a certain way. Having at one time worked
>in advanced composite materials in aerospace, and having also made my
>own sockets, and also having listened to a great many opinions on the
>issue, I have a few brief comments.
>
>There are the purists, who will say, for example, that one must use a
>carbon fiber reinforced lamination, as this fiber reinforcement
>affords the greatest strength with repect to volume. I have found
>this to be overkill and a bit more expensive than need be. There are
>also those who will make sockets really, really thick just to be sure.
> I have had some of these and while perhaps bullet proof, they
>certainly are heavy!
>
>For what it's worth, I have settled for the time on acrylic
>laminations that are mostly glass reinforce with a bit of carbon tape
>in high stress areas. I am a very active BK. My last two sockets are
>thin enough to see light through the acrylic matric and open weave
>carbon glass lamination.
>
>Finish this with layup sequence
stakes!) prematurely, and I am still looking for that lay-up sequence!
Chris (CJ) Johnson, Engineering Director
College Park Industries, Inc. ( <URL Redacted>)
On Tue, 10 Nov 1998 08:32:59 -0500 <Email Address Redacted> (Chris L Johnson)
writes:
>There was a question on the list as to exactly why sockets are
>supposed to be laminated in a certain way. Having at one time worked
>in advanced composite materials in aerospace, and having also made my
>own sockets, and also having listened to a great many opinions on the
>issue, I have a few brief comments.
>
>There are the purists, who will say, for example, that one must use a
>carbon fiber reinforced lamination, as this fiber reinforcement
>affords the greatest strength with repect to volume. I have found
>this to be overkill and a bit more expensive than need be. There are
>also those who will make sockets really, really thick just to be sure.
> I have had some of these and while perhaps bullet proof, they
>certainly are heavy!
>
>For what it's worth, I have settled for the time on acrylic
>laminations that are mostly glass reinforce with a bit of carbon tape
>in high stress areas. I am a very active BK. My last two sockets are
>thin enough to see light through the acrylic matric and open weave
>carbon glass lamination.
>
>Finish this with layup sequence
Citation
Chris Johnson, CPI Engineering Director, “Re: Socket Lamination,” Digital Resource Foundation for Orthotics and Prosthetics, accessed November 18, 2024, https://library.drfop.org/items/show/211089.
