The stress-strain curves are plotted for two different materials $A$ and $B$. It is observed that th

Question

The stress-strain curves are plotted for two different materials $A$ and $B$. It is observed that the ultimate strength point and the fracture point are far apart for material $A$, but they are very close to each other for material $B$. We can conclude that materials $A$ and $B$ are likely to be (respectively)

Professor PC Thomas Classes · Answer

(a) : For ductile materials, there is a large plastic deformation region between the ultimate strength point and the fracture point, meaning these two points are far apart on the stress-strain curve (Material A). For brittle materials, the material breaks shortly after its elastic limit, meaning the ultimate strength point and fracture point are very close to each other (Material B).