Shear modulus encyclopedia topics

Related Searches

on Ask.com

equation for shear modulus

young's modulus and shear modulus

shear modulus steel

table of values of shear modulus

shear modulus formula

shear modulus of mild steel

shear modulus of aluminum

calculate shear modulus

tell e about shear modulus

derive shear modulus

shear modulus an introduction

shear modulus of copper

Shear modulus

2 reference results for: Shear modulus

Wikipedia

In materials science, shear modulus or modulus of rigidity, denoted by G, or sometimes S or μ, is defined as the ratio of shear stress to the shear strain:

G  stackrel{mathrm{def}}{=}   frac {sigma_{xy}} {epsilon_{xy}} =  frac{F/A}{Delta x/h} = frac{F h}{Delta x A}

where

sigma_{xy} = F/A ,

= shear stress;

F

is the force which acts

A

is the area on which the force acts

epsilon_{xy} = Delta x/h = tan theta ,

= shear strain;

Delta x

is the transverse displacement

h

is the initial length (labelled

I

in the diagram opposite)

Shear modulus is usually measured in GPa (gigapascals) or ksi (thousands of pounds per square inch).

Material	Typical values for shear modulus (G Pa) (at room temperature)
Diamond	478.
Steel	79.3
Copper	44.7
Titanium	41.4
Glass	26.2
Aluminium	25.5
Polyethylene	0.117
Rubber	0.0006

Explanation

The shear modulus is one of several quantities for measuring the strength of materials. All of them arise in the generalized Hooke's law:

Young's modulus describes the material's response to linear strain (like pulling on the ends of a wire),
the bulk modulus describes the material's response to uniform pressure, and
the shear modulus describes the material's response to shearing strains.

The shear modulus is concerned with the deformation of a solid when it experiences a force parallel to one of its surfaces while its opposite face experiences an opposing force (such as friction). In the case of an object that's shaped like a rectangular prism, it will deform into a parallelepiped. Anisotropic materials such as wood and paper exhibit differing material response to stress or strain when tested in different directions. In this case, when the deformation is small enough so that the deformation is linear, the elastic moduli, including the shear modulus, will then be a tensor, rather than a single scalar value.

Waves

In homogeneous and isotropic solids, there are two kinds of waves, pressure waves and shear waves. The velocity of a shear wave,

(v_s)

is controlled by the shear modulus,

v_s = sqrt{frac {G} {rho} }

where

G is the shear modulus

rho

is the solid's density.

References

Wikipedia, the free encyclopedia © 2001-2006 Wikipedia contributors (Disclaimer)
This article is licensed under the GNU Free Documentation License.
Last updated on Saturday July 19, 2008 at 14:15:32 PDT (GMT -0700)
View this article at Wikipedia.org - Edit this article at Wikipedia.org - Donate to the Wikimedia Foundation

CITE THIS SOURCE|PRINT

Wikipedia

In materials science, shear modulus or modulus of rigidity, denoted by G, or sometimes S or μ, is defined as the ratio of shear stress to the shear strain:

G  stackrel{mathrm{def}}{=}   frac {sigma_{xy}} {epsilon_{xy}} =  frac{F/A}{Delta x/h} = frac{F h}{Delta x A}

where

sigma_{xy} = F/A ,

= shear stress;

F

is the force which acts

A

is the area on which the force acts

epsilon_{xy} = Delta x/h = tan theta ,

= shear strain;

Delta x

is the transverse displacement

h

is the initial length (labelled

I

in the diagram opposite)

Shear modulus is usually measured in GPa (gigapascals) or ksi (thousands of pounds per square inch).

Material	Typical values for shear modulus (G Pa) (at room temperature)
Diamond	478.
Steel	79.3
Copper	44.7
Titanium	41.4
Glass	26.2
Aluminium	25.5
Polyethylene	0.117
Rubber	0.0006

Explanation

The shear modulus is one of several quantities for measuring the strength of materials. All of them arise in the generalized Hooke's law:

Young's modulus describes the material's response to linear strain (like pulling on the ends of a wire),
the bulk modulus describes the material's response to uniform pressure, and
the shear modulus describes the material's response to shearing strains.