🚀 go-pugleaf

In article <1992Nov1.185944.13726@hubcap.clemson.edu> tdtyl@hubcap.clemson.edu (theodore d taylor) writes:
>billn@hpcvaac.cv.hp.com (bill nelson) writes:
>
>>jeff@mama.minmet.uq.oz (Jeff Gates) writes:
>
>>: >how window glass was made when these buildings were built.  The

[...lots of stuff deleted...]

>
>I have studied glass all of my professional life (~30 yrs).  I have
>never seen any authority take this notion of glass flowing seriously.  I
>have seen a picture of glass rods strongly bent and held in that
>position for 26 years.  When one of the rods was eventually released, it
>became perfectly straight within 24 to 48 hrs.  You would think that
>permanent deformation of some type would have been evident after so long
>a time.
>
>	T. D. Taylor
>	Dept. of Ceramic Engineering
>	Clemson University
>	Clemson, SC USA


I have seen fiberglass fishing rods develop a permanent bend from being
hung on nails with the end not supported for years.  I guess that this
could be due to flow in the polymer, or the fibers slipping through
the polymer, but I thought it was due to the glass slowly flowing.

John
snyder@henry.ece.cmu.edu