Question

strss strain curve for iron meterial
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Answer 1

Answer:

Now the reason why the stress-strain curves are like this can be explained by their mechanical behaviour (even though stress-strain curves were obtained by experiments and from the results the mechanical properties of the material were told). Mild steel in mechanical language is one of the toughest material since it can absorb high energy before fracturing while cast iron curve ends with a near straight line since it is brittle and as soon as the elastic limit is exceeded, it tends to tear apart.

As for aluminium, the stress-strain curve is somewhere in between the other two materials. This can attributed to its moderate capacity to resist against fracture in the plastic deformation zone.

Hope this is sufficient to understand the stress-strain curve.