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  4. The stress-strain graphs for materials A and B are shown in Figs. (i) and (ii) (given, θ< α ). <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/physics/770a8cd1960d9be00e44b32be5c259f4-.png /> The graphs are drawn to the same scale. Which of the two is the stronger material?

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Q. The stress-strain graphs for materials $A$ and $B$ are shown in Figs. (i) and (ii) (given, $\theta< \alpha$ ).
image
The graphs are drawn to the same scale. Which of the two is the stronger material?

Mechanical Properties of Solids

Solution:

From the given figure, we can say that, the slope of the linear portion of the stress-strain curve is greater for material $B$.
Hence, Young's modulus of $B$ is greater than that of material $A$. Material $B$ can withstand more load without breaking.
So, it is stronger than material $A$ and its ulimate stress is higher.