What is the elasticity of bitumen?

The elastic recovery of a bitumen is expressed as a percentage of the distance between the ends of the half-threads, which has developed 30 min after the division relative to the elongation length of 200 mm.

What is an Elasto plastic material?

Definition of elastoplastic (Entry 1 of 2) : a substance having both elastic and plastic properties : a rubberlike plastic.

What are the factors affecting permanent deformation of bitumen?

The severity of creep deformation is based on three key factors: temperature, stress (intrinsic, applied, or thermal) and time.

What is an elastic pavement?

Elastic paving material is a flooring material which is made by mixing elastic chips (Urethane, EPDM Chips, Recycled rubber chips, Waste tire chips) and urethane binders, and curing and curing them to give excellent elasticity.

What is stress and strain?

Stress and Strain are the two terms in Physics that describe the forces causing the deformation of the objects. Deformation is known as the change of the shape of an object by applications of force. Very small forces can also cause deformation.

What is elastic plastic deformation?

When energy goes into changing the shape of some material and it stays changed, that is said to be plastic deformation. When the material goes back to its original form, that’s elastic deformation. If more force or pressure is applied, then they have plastic deformation.

What is permanent plastic deformation?

Plastic deformation is the permanent distortion that occurs when a material is subjected to tensile, compressive, bending, or torsion stresses that exceed its yield strength and cause it to elongate, compress, buckle, bend, or twist.

Do plastic materials have stress/strain curve diagrams?

-All Stress/Strain Curve Diagrams utilized in this Instructable are typical of most metal materials. Plastic materials, however, can have varying types of curves. For simplicity, plastic materials will be neglected in this Instructable. -Image references came from various engineering websites, listed here:

What is the stress-strain relationship for a material?

The stress-strain relationship for a material is given by that material’s stress-strain curve. Under different loads, the stress and corresponding strain values are plotted. An example of a stress-strain curve is given below.

What happens to the engineering stress-strain curve after the ultimate strength?

The engineering stress-strain curve drops after the ultimate strength is reached because the force that can be supported by the material drops as it begins to neck down. However, the stress value in the true stress-strain curve always increases as the strain increases.

How does strain hardening affect the strength of a material?

Once the material yields, it begins to strain harden which increases the strength of the material. In the stress-strain curves below, the strength of the material can be seen to increase between the yield point Y and the ultimate strength at point U. This increase in strength is the result of strain hardening.