# Shear Modulus

1. Apr 11, 2010

### RCulling

I was wondering if anyone could please point me in the direction of some background info on who (and why) someone defined the equations definition of the shear modulus, I've searched in google and wiki and havnt found anything useful. Just a link or something would be great

2. Apr 11, 2010

### rock.freak667

It is similarly defined as the modulus of elasticity

Modulus of Rigidity = Shear force/ Shear strain

It is also related to the modulus of elasticity E by

$$G=\frac{E}{2(1+\nu)}$$ where v is the Poisson's ratio.

3. Apr 11, 2010

### RCulling

thanks :) but I was more wanting the person that defined it, I've to write a report on it, and need some background info... Which I can't seem to find

4. Apr 11, 2010

### rock.freak667

In that case, I do not know as well. Sorry.

5. Apr 11, 2010

### RCulling

All good :) thanks