[Shotimes] windshield crack

[MonsieurBoo@aol.com]

I'm no materials engineer, just squawkin' back what I learnt at my daddy's  
knee.  That woulda been right around the time they made safety glass a  
standard item ;-)
 
Glass is an interesting critter.  It does "creep" over the course of  years, 
so a tall window in an old mansion will be thicker at the bottom  than at the 
top.  Thus it undeniably demonstrates its "non-solid"  character.  But in the 
short term it's hard to tell it's anything but  solid.  I, too, am wondering 
if glu-lamming it in a tempered sandwich  causes it to act more like a solid.  
On the other hand, I'm inclined  to think laminated glass propagates the crack 
slower, but it sure doesn't stop  it though!
 
Cheers
Mark LaBarre
94 atx 130k
_______________________

I would have to believe that windshield tempered glass behaves like a  solid 
in this case.  in fact really everything about glass acts like a  solid even 
though "technically" it is not.
 
Z


On 9/15/05, Kevin &  Cheryl Airth <_clubairth@peoplepc.com_ 
(mailto:clubairth@peoplepc.com) >  wrote:  
Mark:
This  brings up an interesting question. For a solid you are correct that  a
round hole at the end of a crack will cut the stress riser factor down  to 
almost nothing. But glass is a super cooled liquid and is not really  a
solid. Maybe the same idea works on a super cooled liquid or maybe  tempered
safety glass is more solid like than regular  glass?