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

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Message 1 of 12
JDMather
666 Views, 11 Replies

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

....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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11 REPLIES 11
Message 2 of 12
GSE_Dan_A
in reply to: JDMather

Looks like Stress and Strain equations...

GSE Consultants Inc.
Windsor, ON. Canada
Message 3 of 12
mcgyvr
in reply to: JDMather

Whats a book?



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Inventor 2023 - Dell Precision 5570

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Message 4 of 12
conklinjm
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

 

 

Message 5 of 12
GSE_Dan_A
in reply to: mcgyvr

Mac Book?

GSE Consultants Inc.
Windsor, ON. Canada
Message 6 of 12
JDMather
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.  Smiley Indifferent


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Certified SolidWorks Professional


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Message 7 of 12
JDMather
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.

 


-----------------------------------------------------------------------------------------
Autodesk Inventor 2019 Certified Professional
Autodesk AutoCAD 2013 Certified Professional
Certified SolidWorks Professional


The CADWhisperer YouTube Channel


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Message 9 of 12
mcgyvr
in reply to: JDMather


@Anonymous 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.  Smiley Indifferent


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? 😉



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Inventor 2023 - Dell Precision 5570

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Maybe buy me a beer through Venmo @mcgyvr1269
Message 10 of 12
GSE_Dan_A
in reply to: mcgyvr

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

GSE Consultants Inc.
Windsor, ON. Canada
Message 11 of 12
graemev
in reply to: mcgyvr


@mcgyvr wrote:

Whats a book?


It's a non-volatile storage medium, usually cellulose-based.  We suffered the "upgrade" from clay and stone tablets years ago.  Some of us "old guys" still have a fondness for earilier technologies.  {sigh}

Message 12 of 12
dgorsman
in reply to: graemev

Ahhh, verbal history.  Forced the young-uns to pay attention.  Mind you, the mallets from the stoneworking tools came in handy when they didn't.

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