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# What is the formula of stress and strain?

## What is the formula of stress and strain?

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 the formula for strain in physics?

Strain occurs when force is applied to an object. Strain deals mostly with the change in length of the object. Strain = Δ L L = Change in Length Original Length .

How do you calculate stress in physics?

Stress

1. Stress is defined as the force per unit area of a material.
2. i.e. Stress = force / cross sectional area:
3. Strain is defined as extension per unit length.
4. Strain = extension / original length.
5. Strain has no units because it is a ratio of lengths.

What is stress and strain physics?

Stress is a measure of the force put on the object over the area. Strain is the change in length divided by the original length of the object. Experiments have shown that the change in length (ΔL) depends on only a few variables.

## What is stress formula?

The stress formula is the divided product of the force by the cross-section area. Stress = \frac{Force}{Area}

### What is SI unit of stress?

Stress is the force per unit area on a body that tends to cause it to change shape. In SI units, force is measured in newtons and area in square metres. This means stress is newtons per square meter, or N/m2. However, stress has its own SI unit, called the pascal. 1 pascal (symbol Pa) is equal to 1 N/m2.

What is SI unit of yield strength?

As yield strength is related to deformation which is a result of applied stress, the SI unit of yield strength is N.m-2. In CGS system, the yield strength is g.cm-2.

What is the equation for stress and strain?

Stress Equation. Stress (sigma) is related to strain (epsilon) through the equation: sigma = E x epsilon. This relationship is only valid in regions where Hooke’s Law is valid.

## What is the relationship between stress and strain?

Stress is variable, while strain can be invariable. Stress measures the deforming force on an object, while strain is the change in length triggered by the deforming force. Stress is internally generated but caused by external pressure, while strain is usually generated by the amount of force or stress applied.

### What is the equation for strain?

Strain Analysis. The general mathematical equation for strain is: Strain = dimensional change / original dimension, or ε = Δ R/R o. Where R is a dimension such as length, width, angular displacement, etc., R o is the original dimension, and Δ R is the difference between the deformed dimension and the original dimension.

What is the SI unit for stress?

Units of stress. Since the unit of load is N and the unit of cross section area is m2. or cm2 or mm2. So the SI unit of stress is N/m2. or N/cm2 or N/mm2.