# Stress-Strain Graph:Why Plot Strain~Stress?

• haraigcar
In summary, a stress-strain graph is a graphical representation of the relationship between stress and strain for a material, with strain on the x-axis and stress on the y-axis. It is used to visualize how a material responds to external forces and determine its mechanical properties. The yield point is determined by drawing a parallel line to the initial linear portion and finding the intersection point. The graph provides information about a material's stiffness, strength, and ability to withstand stress. The slope of the linear portion, or modulus of elasticity, is an important measure of a material's stiffness and can be used for comparison.
haraigcar
I have a very fundamental doubt regarding the stress strain graph for many materials..Normally we plot strain ~stress in the graph..but it seems that stress is the independent variable and strain is the dependent variable..but still why nowhere i have found the curve as stress~strain..can anybody please tell me the reason?

## 1. What is a stress-strain graph?

A stress-strain graph is a graphical representation of the relationship between stress and strain for a particular material. It shows how a material responds to external forces, such as tension or compression, and how much it can be deformed before breaking.

## 2. Why is strain plotted on the x-axis and stress on the y-axis?

In a stress-strain graph, the x-axis represents strain, which is a measure of how much a material is deformed in response to stress. The y-axis represents stress, which is a measure of the amount of force applied to a material. Plotting strain on the x-axis and stress on the y-axis allows for a clear visualization of the relationship between the two variables.

## 3. How is the yield point determined on a stress-strain graph?

The yield point on a stress-strain graph is the point at which a material starts to deform plastically, meaning it does not return to its original shape when the stress is removed. It is determined by drawing a line parallel to the initial linear portion of the graph and finding the intersection point with the curve.

## 4. What information can be obtained from a stress-strain graph?

A stress-strain graph provides information about the mechanical properties of a material, such as its stiffness, strength, and ductility. It can also help determine the material's ability to withstand different types of stress, such as tension or compression.

## 5. Why is the slope of the linear portion of the stress-strain graph important?

The slope of the linear portion of the stress-strain graph, also known as the modulus of elasticity, is an important measure of a material's stiffness. It represents the material's resistance to deformation under stress and can be used to compare the properties of different materials.

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