I have initial and final gauge length and diameter and also have max load. Now i have to draw stress strain diagram. I know how to draw that graph but i a not provided with failure load or yield load so i am not sure how to graph. Appreciate any help. Thanx in advance
To graph, you need a series of stress and strain data points. Was there an experiment that you performed, or were supposed to perform?
Yielding occurs when the stress-strain relationship is no longer linear; a "permanent set" then often occurs.
The failure load is, of course, the load at which the sample breaks. It is often referred to as the ultimate stress.
I don't know what you nmean by "gauge length"
hey we performed experiment and lecturer mailed the results which doesnt have any series of results just one result. And gauge length is length of the specimen used.
To draw a stress-strain diagram, you typically need data on the relationship between stress (force per unit area) and strain (deformation per unit length) for a given material. In your case, it seems like you have limited information, but we can work with what you have.
To get an approximation of the stress-strain relationship, you can use the initial and final gauge length and diameter, along with the maximum load.
1. Calculate the cross-sectional area (A):
- Use the final gauge diameter to find the cross-sectional area of the material, A = π(d/2)^2, where d is the final gauge diameter.
2. Calculate the extension or deformation (ΔL):
- Use the initial and final gauge lengths to find the extension or deformation, ΔL = Lf - Li, where Lf is the final gauge length and Li is the initial gauge length.
3. Calculate the strain (ε):
- Strain is defined as the deformation per unit length, so strain (ε) = ΔL / Li.
4. Calculate the stress (σ):
- Stress is the force per unit area, so stress (σ) = max load / A.
Now that you have the stress and strain values, you can plot them on a graph to create the stress-strain diagram. The stress values will be plotted on the y-axis, and the strain values will be plotted on the x-axis.
Note that without information about the failure load or yield load, you won't be able to determine the exact yield point or ultimate tensile strength on the diagram. However, you may still observe the general behavior of the material up to the point where you have data.
Remember, this is an approximation, and for a more accurate stress-strain diagram, you would need complete test data, including the yield and failure points.