What is stress-strain curve for rubber?

What is stress-strain curve for rubber?

The stress-strain curve for rubber is distinctly different from that of a metallic wire. Firstly, there is no region of proportionality. Secondly, when the deforming force is gradually reduced, the original curve is not retraced, although the sample finally acquires its natural length.

How do you calculate stress deformation?

stress = (elastic modulus) × strain. stress = (elastic modulus) × strain. As we can see from dimensional analysis of this relation, the elastic modulus has the same physical unit as stress because strain is dimensionless.

What is stress-strain curve for cast iron?

limit of brittle material (gray cast iron) is the point on stress strain curve which shows the highest stress at which Stress and Strain are linearly proportional to each other where the proportionality constant is E known as modulus of elasticity. Above this point, stress is no longer linearly proportional to strain.

What is a stress diagram?

Definition of stress diagram : a diagram that results from the graphical analysis of the stresses in a framed structure.

How do you calculate deformation?

Deformation of a body is expressed in the form x = F(X) where X is the reference position of material points of the body.

What stress causes elastic deformation?

Tensile (or compressive) stress causes elongation (or shortening) of the object or medium and is due to an external forces acting along only one direction perpendicular to the cross-section. Bulk strain is the response of an object or medium to bulk stress. Here, the elastic modulus is called the bulk modulus.

How are stress and deformation related?

When you apply stress to an object, it deforms. Think of a rubber band: you pull on it, and it gets longer – it stretches. Deformation is a measure of how much an object is stretched, and strain is the ratio between the deformation and the original length.

What is the Young’s modulus of rubber?

Young’s modulus of rubber is 104N/m2 and area of cross section is 2 cm−2. If force of 2×105 dyn is applied along its length, then its initial l becomes.

What is stress strain curve for mild steel?

If tensile force is applied to a steel bar, it will have some elongation. If the force is small enough, the ratio of the stress and strain will remain proportional. This can be seen in the graph as a straight line between zero and point A – also called the limit of proportionality.

How do you convert stress to load?

To convert the load to stress, you divide the load by the area of the specimen tested. (i.e. N/mm2). Use the conversion factors to change this stress (N/mm2) to the units of your interest. For instance, converting the units to Pa, you can multiply the N/mm2 by a square of (1000mm/1m) which will give you N/m2.