## Elastic modulus

An elastic **modulus** , or **modulus** of **elasticity** , is the mathematical description of an object or substance's tendency to be deformed elastically (i.e., non-permanently) when a force is applied to it. The elastic **modulus** of an object is defined as the slope of its stress-strain curve in

**wikipedia.org**| 2011/5/15 0:27:43

## Young's modulus

Young's **modulus** is a measure of the stiffness of an elastic material and is a quantity used to characterize materials. It is defined as the ratio of the uniaxial stress over the uniaxial strain in the range of stress in which Hooke's Law holds. [ 1 ] In solid mechanics , the slope of

**wikipedia.org**| 2011/8/18 14:08:14

## Solid mechanics

Solid mechanics The study of the physics of continuous materials with a defined rest shape. **Elasticity** Describes materials that return to their rest shape after an applied stress . Plasticity Describes materials that permanently deform after a sufficient applied stress. Rheology

**wikipedia.org**| 2010/10/2 1:36:58

## Acoustic rheometer

It is well known that properties of viscoelastic fluid are characterised in shear rheology with a shear **modulus** G , which links shear stress T ij and shear strain S ij There is similar linear relationship in extensional rheology between extensional stress P , extensional strain

**wikipedia.org**| 2010/9/25 22:23:36

## Linear elasticity

components with respect to a rectangular Cartesian coordinate system, the governing equations of linear **elasticity** are: Equation of motion : where the subscript is a shorthand for and indicates . Engineering notation These are 3 independent equations with 6 independent

**wikipedia.org**| 2011/5/4 19:06:21

## Strength of materials

ultimate) strength. For example failure in buckling is dependent on material stiffness (Young's **Modulus** ). Contents 1 Types of loadings 2 Definitions 2.1 Stress terms 2.2 Strength terms 2.3 Strain (deformation) terms 3 Stress-strain relations 4 Design terms 4.1 Failure

**wikipedia.org**| 2011/8/19 7:26:53

## Yield (engineering)

, so the stress-strain graph is a straight line, and the gradient will be equal to the elastic **modulus** of the material. Elastic limit (yield strength) Beyond the elastic limit, permanent deformation will occur. The lowest stress at which permanent deformation can be measured. This requires

**wikipedia.org**| 2011/9/2 7:00:31