## Which of the following is the graphical representation of the stress at a point?

Mohr circle is a graphical representation of plane stress which helps in determining the relationships between normal and shear stresses acting on an inclined plane at a point in a stressed body.

## How do you find principal stress direction?

In 2-D, the principal stress orientation, θP , can be computed by setting τ′xy=0 τ ′ x y = 0 in the above shear equation and solving for θ to get θP , the principal stress angle. Inserting this value for θP back into the equations for the normal stresses gives the principal values.

## Which curve gives the maximum safe stress points?

The stress-strain curve also shown the region where necking occurs. Its starting-point also gives us the ultimate tensile strength of a material. Ultimate tensile strength shows the maximum amount of stress a material can handle.

## Can engineering be negative stress?

In physics and engineering, tensile stress is considered positive, and compressive stress negative.

## What does negative stress mean engineering?

Compressive stress has stress units (force per unit area), usually with negative values to indicate the compaction. Compressive stress is defined in the same way as the tensile stress but it has negative values so as to express the compression since dL has the opposite direction. ( L is the length of the object.)

## What is tensile and compressive stress?

Tensile stress is the normal force per area (σ = F/A) that causes an object to increase in length. Compressive stress is the normal force per area (σ = F/A) that causes an object to decrease in length.

## What is the difference between tensile and compressive load?

In other words, compressive strength resists being pushed together, whereas tensile strength resists tension (being pulled apart). Some materials fracture at their compressive strength limit; others deform irreversibly, so a given amount of deformation may be considered as the limit for compressive load.

## What units is the tensile strength test measured in?

Tensile strengths have dimensions of force per unit area and in the English system of measurement are commonly expressed in units of pounds per square inch, often abbreviated to psi.

## How do you test the tensile strength of steel?

Tension test is performed on mild steel, tor steel and high tensile steel to determine the properties like Young’s modulus, ultimate strength, and the percentage elongation. In the tension test, a steel rod is subjected to tension load by the means of a Universal testing machine(UTM).