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JDMather
Posts: 27,586
Registered: ‎04-20-2006
Message 1 of 12 (408 Views)
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Engineering Question - You know you are gettting old....

408 Views, 11 Replies
11-05-2013 10:31 AM

....I opened a book (on Statics) and found a scrap of paper where I had scribbled out the equation

 

E/2G=1+V

and then re-arranged to solve for E or V.

 

E=2G(1+V)

V=(E-2G)/2G

 

...the problem is I can't remember what the formula was for (remember a Statics book) and I went forwards and backwards through the book and can't find the reference.

 

Anyone have an idea?

 

H.W. Morrow, Statics and Strength of Materials, 7th Ed.

 

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The first thing that came to mind was Stress/Strain relationships

 

E - Modulus of Elasticity

 

G - Shear Modulus of Elasticity / Modulus of Rigidity

 

V - Poisson's Ratio

 

 

Valued Mentor
GSE_Dan_A
Posts: 306
Registered: ‎10-06-2011
Message 2 of 12 (397 Views)

Re: Engineering Question - You know you are gettting old....

11-05-2013 10:40 AM in reply to: JDMather

Looks like Stress and Strain equations...

GSE Consultants Inc.
Windsor, ON. Canada
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mcgyvr
Posts: 7,102
Registered: ‎12-01-2004
Message 3 of 12 (396 Views)

Re: Engineering Question - You know you are gettting old....

11-05-2013 10:41 AM in reply to: JDMather

Whats a book?

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conklinjm
Posts: 62
Registered: ‎02-23-2009
Message 4 of 12 (396 Views)

Re: Engineering Question - You know you are gettting old....

11-05-2013 10:43 AM in reply to: JDMather

The first thing that came to mind was Stress/Strain relationships

 

E - Modulus of Elasticity

 

G - Shear Modulus of Elasticity / Modulus of Rigidity

 

V - Poisson's Ratio

 

 

Valued Mentor
GSE_Dan_A
Posts: 306
Registered: ‎10-06-2011
Message 5 of 12 (385 Views)

Re: Engineering Question - You know you are gettting old....

11-05-2013 10:44 AM in reply to: mcgyvr

Mac Book?

GSE Consultants Inc.
Windsor, ON. Canada
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JDMather
Posts: 27,586
Registered: ‎04-20-2006
Message 6 of 12 (385 Views)

Re: Engineering Question - You know you are gettting old....

11-05-2013 10:45 AM in reply to: mcgyvr

mcgyvr wrote:

Whats a book?


An artifact found in a dusty old building referred to as "The Library".  Most of my students have never been in this building.  :smileyindifferent:

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*Expert Elite*
JDMather
Posts: 27,586
Registered: ‎04-20-2006
Message 7 of 12 (381 Views)

Re: Engineering Question - You know you are gettting old....

11-05-2013 10:51 AM in reply to: conklinjm

conklinjm wrote:

The first thing that came to mind was Stress/Strain relationships

 

E - Modulus of Elasticity

 

G - Shear Modulus of Elasticity / Modulus of Rigidity

 

V - Poisson's Ratio

 

 


Thanks, I found it with your tip

Hook's Law for Shear.

G=E/(2(1+v))

The relationship between elastic constants.

 

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cbenner
Posts: 3,329
Registered: ‎04-06-2010
Message 8 of 12 (361 Views)

Re: Engineering Question - You know you are gettting old....

11-05-2013 11:06 AM in reply to: JDMather

You're all going to be banned with language like that!  :smileywink:

ChrisB

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mcgyvr
Posts: 7,102
Registered: ‎12-01-2004
Message 9 of 12 (353 Views)

Re: Engineering Question - You know you are gettting old....

11-05-2013 11:21 AM in reply to: JDMather

JDMather wrote:

mcgyvr wrote:

Whats a book?


An artifact found in a dusty old building referred to as "The Library".  Most of my students have never been in this building.  :smileyindifferent:


oooohhh. So its like real world "cloud" storage.. I get it now.. .     gee why would you ever need one of those places. Have old people never heard of google before? :smileywink:

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Valued Mentor
GSE_Dan_A
Posts: 306
Registered: ‎10-06-2011
Message 10 of 12 (328 Views)

Re: Engineering Question - You know you are gettting old....

11-05-2013 12:12 PM in reply to: mcgyvr

Google or Wiki...because EVERYTHING on the internet is true or factual!

GSE Consultants Inc.
Windsor, ON. Canada
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