Confused About Results I Obtained

Without data or clearly identified methodology, we cannot tell you why, too. I can make some Wild A$$ Guesses. Somewhere in your calculations, you have improperly mixed units. That would make for consistently different numbers generated than expected. Another possibility is your method for obtaining experimental data is flawed itself. Often this error will induce a randomization factor between anticipated and actual calculation results.

Calculate the errors between anticipated and measured results. The errors themselves may identify the flaw in the experiment.

Good Luck

normal stress vertical axis , in M/Nm^2 i got 140x10^6

Normal Strain horizontal axis , mirco strain i got 20x10^-3

the calulations i got was fine. i got 7x10^9, meant to be aroun 100 - 120

was thinking it maybe the normal stress axis UTS got 340 what was in range

do u think axis i used may be wrong

calulated a 94% difference between what i should get and got

We clearly have a failure to communicate.

Stress (σ) is in the units of force divided by area. M is the Chemistry standard unit symbol for Molarity or Molar concentration. N is SI standard unit symbol for a force. m is the standard unit symbol for the length of a meter. Your units don't make sense. You also do not show any of your calculations, only the results that don't make sense.

Engineering is a precise, technical field. If you are not precise and technical it will never make sense.

Assuming you meant MN/m^2 (= MPa = N/mm^2), your 140x10^6 is much too high. It would be reasonable in N/m^2.

Fig.1: Stress–strain curve showing typical yield behavior for nonferrous alloys. Stress ({\displaystyle \sigma }) is shown as a function of strain ({\displaystyle \epsilon })
1: Elastic (proportionality) limit
2: Offset yield strength (0.2% proof strength)

https://en.wikipedia.org/wiki/Stress%E2%80%93strain_curve

Hi

may i ask

if one axis produce correct for UTS point

other may not be, if it doesnt produce correct elastic limit

other axis produces correct UTS

It sounds like your heat treatment is incorrect....

https://www.engineersedge.com/material_science/heat_treatment.htm

It is easy to get the values since it is a material deformation due to a force. Most of the times errs are due to units. It maybe, we can check your results if you post the testing data. Regards

Usually TENSILE STRESS should be in the Y-AXE and TENSILE STRAIN in the X-AXE.

Please, represent Tensile Strain as in the source below. Fimally, determine the ELESTIC MODULUS (Young's Modulus) according to equation below:

E = tensile stress/tensile strain = (FL) / (A * change in L),

where F is the applied force, L is the initial length, A is the square area, and E is Young’s modulus in Pascals (Pa)

Or. in psi as in the cited source.

https://mechanicalc.com/calculators/material-stress-strain-curve/

It is easy to get the values since it is a material deformation due to a force. Most of the times errs are due to units. It maybe, we can check your results if you post the testing data. Regards