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Strength of Materials

Tensile Test of Mild Steel

What is the s...

Question

What is the stress at the section $x - x$ for the bar $A B C D$ with uniform cross-section $1000 m m^{2}$ ?

A

20 N / m m^{2}

(Tensile)

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B

30 N / m m^{2}

(Compresssive)

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C

80 N / m m^{2}

(Tensile)

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D

50 N / m m^{2}

(Compressive)

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Solution

The correct option is A $20 N / m m^{2}$ (Tensile)
Force at section $x - x$
$= 60 + 20 = 80 k N (T)$
$∴$ Stress at section $x - x$
$= \frac{F}{A} = \frac{80 \times 10^{3} N}{1000 m m^{2}} (T) = 80 N / m m^{2} (T)$

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