Stress is force per unit area - strain is the deformation of a solid due to stress. tensile stress - stress that tends to stretch or lengthen the material - acts normal to the stressed area. compressive stress - stress that tends to compress or shorten the material - acts normal to the stressed area. Demonstrates how to calculate engineering stress and strain. Made by faculty at the University of Colorado. This is identical to the formula for pressure. On a stress strain graph beyond the yield point (or elastic limit) the material will no longer return to its original.

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The material will now 'give' and extend more under less force. At point 3, the material has been fractured and so no further measurements can stress and strain calculations taken. The ratio of lateral unit stress and strain calculations to longitudinal unit strain under the condition of uniform and uniaxial longitudinal stress within the proportional limit.

To further simplify the calculation, the nonlinear portion of the stress-strain curve is approximated by a series of straight lines as shown to the left.

In the example to the left, the modulus of toughness is determined by summing the areas A1 through A4.

### A-level Physics (Advancing Physics)/Stress, Strain & Young's Modulus

Also known as the Modulus of Elasticity, is a measure of material resistance to axial deformation. Its value is obtained by measuring the slope of the axial stress-strain curve in the elastic region. It is named after the English scientist Thomas Young.

Since in some materials Young's modulus in tension is different from that in compression, subscript c or t is used to simplify the distinction. Tangent modulus is defined as the slope of a line tangent to the stress-strain curve at a point stress and strain calculations interest.

Tangent modulus can have different values depending on the point at which it is determined.

For example, tangent modulus stress and strain calculations equal to the Young's Modulus when the point of tangency falls within the linear range of the stress-strain curve.

Rather than converting to metres the measurements can be left in millimetres and the result will be in megapascals.

## How to Find Stress, Strain & Young's Modulus | Example | Engineering Intro

It measures the amount of force being applied over a given area. The weight of the bridge presses down on the pier and the ground pushes up.

As above, since there is no movement, the forces are equal and opposite.

In pin-jointed structural framework some members will be in Compression and some in Tension depending upon the loads through the joints at the ends of stress and strain calculations member. If a member is in motion the loading may be cause partly or in whole by dynamic or inertia forces.

## How to Find Stress, Strain & Young's Modulus | Example | Engineering Intro

For instance the connecting rod of a reciprocating engine is subjected to inertia forces due to piston acceleration and due to its own acceleration as well as gas pressures on the piston and gravity effects.

Pressure is stress and strain calculations effect which occurs when a force is applied on a surface. Pressure is the amount of force acting on a unit area. The symbol of pressure is.

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• How to Find Stress, Strain & Young’s Modulus
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