Friday, November 14, 2008

Re: STRESS AND FORCE

Hi, Joe,
 
I had to look it up, sounded both delicious and entertaining, like this Mama Sake sushi place in Squaw Valley right under the slopes...
Anyway, you point is hard to argue with.
Happy Friday,
 
V. Steve Gordin, SE
Irvine CA
 
----- Original Message -----
Sent: Friday, November 14, 2008 14:58
Subject: Re: STRESS AND FORCE

Steve
 
It may be time for brewski......
 
Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA
 
In a message dated 11/14/2008 12:35:34 P.M. Pacific Standard Time, sgordin@sgeconsulting.com writes:
Ouch.
----- Original Message -----
Sent: Friday, November 14, 2008 11:05
Subject: Re: STRESS AND FORCE


On Nov 14, 2008, at 12:46 PM, Acharya, Suresh wrote:

> Question arises which stress you want to use a indicator? Principal 
> stresses, Von Mises stress, or stresses based on several other 
> hypothesis?

Not to beat this topic to death, but that question was answered in 
sophomore strength of materials--the chapter on failure theories. von 
Mises or maximum shear for ductile materials, maximum principle 
stress for materials like cast iron or for crack propagation. Every 
criterion depending on plastic flow has to be related to yield stress.

Christopher Wright P.E. |"They couldn't hit an elephant at
chrisw@skypoint.com   | this distance" (last words of Gen.
.......................................| John Sedgwick, Spotsylvania 
1864)
http://www.skypoint.com/members/chrisw/



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