Quick Answer: What Is Elastic Fatigue?

How do you find elastic limit?

In equation form, Hooke’s law is given by F=kΔL F = k Δ L , where ΔL is the change in length.

Elasticity is a measure of how difficult it is to stretch an object.

In other words it is a measure of how small k is.

Very elastic materials like rubber have small k and thus will stretch a lot with only a small force..

Why is the elastic Behaviour used?

Below the elastic limit, we say that the spring is showing “elastic behaviour”: the extension is proportional to the force, and it’ll go back to it’s original length when we remove the force. … This means that when a force is applied to deform the shape, it stays deformed when the force is removed.

What are elastomers Class 11?

Elastomers. The materials for which strain produced is much larger than the stress applied, with in the limit of elasticity are called elastomers, e.g., rubber, the elastic tissue of aorta, the large vessel carrying blood from heart. etc. Elastomers have no plastic range.

Why bridges are declared after long use?

When a bridge is used for long times. It lises its elastic strength. Therefore, the amount of strain in the bridge for a given stress will become large and ultimately, the bridge may collapse. That is why the bridge are declared unsafe after long use.

Which material has maximum elastic limit?

rubberIt is the highest limit of the material before the plastic deformation of the material can occur. Once the stress or force is removed from the material, the material comes back to its original shape. Elastomers like rubber have the highest elastic limit. The behavior can be explained by Hooke’s law.

What is elastic fatigue explain with example?

The temporary loss of elastic properties because of the action of repeated alternating deforming force is called elastic fatigue. Due to elastic fatigue: (i) Bridges are declared unsafe after a long time of their use. (ii) Spring balances show wrong readings after they have been used for a long time.

What is elastic limit?

Elastic limit, maximum stress or force per unit area within a solid material that can arise before the onset of permanent deformation. When stresses up to the elastic limit are removed, the material resumes its original size and shape. Stresses beyond the elastic limit cause a material to yield or flow.

What is elastic lag write its uses?

Elastic lag can be used for ensuring that the ingest process is not taking too long, and for detecting if remote timestamps are set incorrectly.

What are the 4 types of elasticity?

Four types of elasticity are demand elasticity, income elasticity, cross elasticity, and price elasticity.

Which substance is more elastic?

rubberElasticity is the ability of a material to regain its own original shape after being stretched according to which, rubber is the most elastic substance. But when we define elasticity in physics it is the ratio of stress to strain. It means that the shape which has more resistance to change is more elastic.

Which is more elastic water or air?

Water is more elastic than the air because we know that the bulk modulus of elasticity is reciprocal of compressibility. So the answer is water is more elastic than air because it is less compressible than the air.

What is elastic fatigue why bridges are declared unsafe after the long use?

When continuous restoring and deforming force is applied, a body loses its strength and body is said to undergo elastic fatigueness. Bridges are regularly and continuously used. Hence, they are under alternate stress which causes elastic fatiguenes in steel. Therefore, bridges are declared unsafe for prologed use.

What is the importance of elastic fatigue?

When a comparatively large force even within the elastic limit acts upon a body for a long time, the body does not return to its original state when the deforming force is removed. The body is then said to be in a state of elastic fatigue.

What do you mean by elastic after effect?

When a elastic body is stretched and applied deforming force is removed then the body is expected to return to its original configuration instantaneously. … This temporary delay in achieving its original configuration is termed as elastic after effect.

What is elastic behavior?

Elastic Behaviour Of Materials. … Elasticity is the ability of a body to resist any permanent change to it when stress is applied. When stress application ceases, the body regains its original shape and size.

Which is more elastic steel or rubber?

If the same amount of force is applied to a steel wire and to a wire made of rubber of same length and cross-sectional area, the extension of rubber wire is easier than the extension of the steel wire. … Therefore, with the help of Young’s modulus, it can be concluded that steel has greater elasticity than rubber.

What do you mean by elastic after effect and elastic fatigue?

Elastic after effect = The delay of certain substances in regaining their original shape after being deformed within their elastic limits. Elastic fatigue= The temporary loss of elastic properties because of the action of repeated alternating deforming force is called elastic fatigue.

What happens to rocks when their elastic limit is reached?

Rocks can bend and stretch up to a point. But once a rock’s elastic limit is passed, the rock breaks. When rocks break in this way, they move along surfaces, or faults. A fault is the surface along which rocks move when they pass their elastic limit and break.