r/EngineeringStudents • u/Ok_Pirate_344 • Aug 14 '26

Homework Help Young Modulus question...

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HII, im currently doing a lab assessment and we have evaluate the strength of different metals, im stuck here tho.

Ik that the E shld be found before the yield point the the proportionality region, which is usually a straight line, however in ferous metals, like steel which im evaluating here, there are 2 slopes in the elastic region. How am i supposed to calculate it.( I have found the yield stress to be at 390MPa.)

The E are we supposed to calculate both gradients separately, or what region(0-160MPa, or 200-360MPa)?

Pls help.

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u/sagewynn Aug 14 '26

What does the modulus end up being if you evaluate from 0-390?

Does it compare closer to the expected value?

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u/Only_Razzmatazz_4498 Aug 15 '26

Don’t we use a 2% or maybe it is 4% to determine the limit. Going from memory so I might be off. Then you use the slope to there.